ScienceTechnologyNatural Sciences

Air Quality Matters

Simon Jones

Air Quality Matters inside our buildings and out.

This Podcast is about Indoor Air Quality, Outdoor Air Quality, Ventilation, and Health in our homes, workplaces, and education settings.

And we already have many of the tools we need to make a difference.

The conversations we have and how we share this knowledge is the key to our success.

We speak with the leaders at the heart of this sector about them and their work, innovation and where this is all going.

Air quality is the single most significant environmental risk we face to our health and wellbeing, and its impacts on us, our friends, our families, and society are profound.

From housing to the workplace, education to healthcare, the quality of the air we breathe matters.

Air Quality Matters

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Yesterday · 1 hr 40 min
From Lab to Building: How Cell Biologists Are Rethinking Indoor Air Protection
This week, we sit down with Brian Renda, Programme Director for the Built Environment, and Victoria Slaughter, PPE Director at Blueprint Biosecurity, to explore a question that fundamentally challenges how we think about pandemic preparedness: What if the single biggest barrier to preventing the next pandemic isn't our lack of scientific knowledge or technology—but our complete failure to recognise that preparing for respiratory pandemics requires pathogen agnostic infrastructure deployed before emergencies strike, high quality respirators accessible to everyone who needs them, and a fundamental shift from accepting pandemics as inevitable to building systems where outbreaks are contained before they spiral into global catastrophe? Key Topics Discussed: Post COVID Reality and the Challenge of Sustained Preparedness: It is incredibly hard to plan and respond to threats that are not immediately in front of you. During the pandemic, the risk was visible and destructive. Now that attention has shifted, it is difficult to maintain focus on the next pandemic when we do not know if it will happen in one year, ten years, or a hundred years. Blueprint's role is to advance our overall state of readiness so that while we may not be able to stop outbreaks from happening, we can stop them from progressing into pandemics. History has shown we cannot predict when the next large event will be. We must be in preparation mode, but we cannot assume we have infinite time. The earlier preparations are done, the better protected we are. The Mask Versus Respirator Problem: So much of the confusion and misinformation during COVID stemmed from a lack of access to high quality products. There is an enormous difference between a mask and a respirator. A respirator filters the air a user breathes to a regulatory standard such as N95 or FFP3. A surgical mask or cloth mask does not. Surgical masks are designed to catch large particles and spit from a wearer's mouth in sterile environments. They are not designed to filter aerosols or airborne particles. The lack of any standard for cloth masks meant protection was wildly variable. Some offered almost no protection at all. When people are given high quality respirators with known efficacy, they do not have to wonder if something is protecting them. That changes everything. Stockpiling Strategy and the Lessons from COVID Waste: Respirators do expire, but the standards are extraordinarily high because these products are a person's last line of defense. Most respirators last longer than their expiration date, but manufacturers want to ensure even the final 0.1 percent that may no longer be good does not reach a person. Some respirators have shelf lives upwards of 20 years. That is very different from products that expire every three years. Smart stockpiling means filling warehouses with products that are ideal for long term storage and allowing for product rotation. Post COVID, many stockpiles are starting to disappear simply because products are expiring. The Built Environment Programme and Pathogen Agnostic Technologies: Blueprint focuses on interventions that are pathogen agnostic, work in occupied spaces, have promising safety and efficacy profiles, integrate into current operations without major disruption, and have the potential to be cost effective. Their formal programmes include Far UVC at 222 nanometers, which has much higher exposure limits than conventional 254 nanometer UVC because of its shorter penetration depth. Conventional upper room GUV, which has been studied since the 1930s yet is still barely used. And glycol vapors such as propylene glycol and triethylene glycol, which have been shown to deactivate aerosolized pathogens and are already mass manufactured for industrial processes. These could be deployed during emergencies with emitters in homes or businesses to add air treatment capacity with relatively little cost or infrastructure. Brian Renda https://www.linkedin.com/in/brian-renda-4264132/ Victoria Slaughter https://www.linkedin.com/in/victoriaslaughter/ Blueprint Biosecurity https://blueprintbiosecurity.org/ The Air Quality Matters Podcast in Partnership with Mann + Hummel https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Charity Partner - https://www.saferairproject.org/
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Thursday · 10 min
Why Teachers Can't Be Human HVAC Controllers: Lessons from Madrid Classrooms
This week, we dive into a study published in Atmospheric Pollution Research titled Effects of Classroom Ventilation Management and User Activities on Indoor Air Quality in Madrid Primary Schools: A Two Year Field Study, to explore a question that fundamentally challenges how we think about school environments and indoor air quality: What if the single biggest barrier to delivering healthy classroom air isn't our lack of scientific knowledge or technology—but our complete failure to recognise that asking teachers to be human HVAC controllers, manually managing windows while teaching 30 active children in densely packed spaces, is a fragile, unstable and fundamentally unsustainable way to manage a building? Key Topics Discussed: The Research Design: A Two Year Behavioral Intervention Study: This Madrid study wanted to see if we could solve this problem through behavioral management alone. They set up a two year field study monitoring nine classrooms across four primary schools. During the first year, they just watched. They recorded business as usual, teachers and students opening and closing windows and doors completely freely based on whether they felt hot, cold or stuffy. Then in the second year, they intervened. They implemented a structured seasonal adapted manual ventilation protocol in one classroom per school, using the other classrooms as controls. This protocol was highly detailed. It scheduled specific window and door openings, such as five minutes at the start of the classroom, during every recess and during lunch breaks. And it adapted the width of the window opening based on whether it was freezing winter, mid season or a warm spring afternoon. The Human Factor: When Compliance Breaks Down: The biggest weakness of all is the human factor. A manual ventilation protocol is only as good as the people executing it. Compliance was highly erratic. In the dead of winter, teachers simply refused to open the windows because the cold drafts were unbearable. During exams or quiet study periods, windows stayed closed because the outdoor street noise was too distracting. If a teacher was in the middle of a complex, engaging lesson, they forgot about the protocol entirely. We are essentially asking teachers to be human HVAC controllers, managing drafts, noise, security and air quality, all while trying to teach 30 young children. It is a fragile, unstable and unsustainable way to manage a building. The Carbon Dioxide Results: Alarming Spikes and Protocol Limits: During lessons with closed windows, CO2 built up at an alarming rate, frequently soaring well past 1500 parts per million and even 2000 parts per million within 30 minutes. When the scheduled breaks arrived and the windows were opened, levels dropped rapidly. Did the structured protocol help? Yes, it did. The intervention classrooms had generally lower average CO2 levels than the business as usual classrooms. But even with strict compliance, they still recorded major CO2 spikes during long, densely occupied teaching blocks. It proved that in high density classrooms, manual natural ventilation simply cannot keep up. Passive window opening has physical limits, especially when wind speeds are low The Air Quality Matters Podcast in Partnership with Mann + Hummel https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Charity Partner - https://www.saferairproject.org/
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#131
September 28 · 1 hr 38 min
Healthy Housing: Connecting Research, Policy, and Communities
This week, we sit down with Amanda Reddy, Executive Director at the National Centre for Healthy Housing, to explore a question that fundamentally challenges how we think about housing quality and public health: What if the single biggest barrier to transforming housing quality isn't our lack of scientific knowledge or technology—but our complete failure to recognise that the places where we spend 70 percent of our lives, our homes, are either actively supporting or systematically undermining our health, and that fixing housing for the most vulnerable fixes it for everyone? Key Topics Discussed: Lead Is Not a Solved Problem: Half a million children in the United States are still exposed to lead levels that threaten their ability to learn and thrive every year. Lead affects neurodevelopment, lowers IQ, impairs executive function and increases the risk of conduct disorders. But it also affects adults. A World Bank study estimated that lead exposure causes five and a half million deaths globally each year, more than AIDS, malaria and road traffic deaths combined. The amount of lead required to poison a child is invisible. Imagine a sugar packet of lead contaminated dust spread evenly over an American football field. That is still enough to be hazardous. You cannot clean your way out of this problem. You have to eliminate the source. The Three Pillar Strategy: The National Centre for Healthy Housing operates through research, policy advocacy and community capacity building. They identify what works through rigorous evidence, advance those solutions through federal, state and local policy changes, and then support communities to implement those solutions on the ground. But they do not arrive with predetermined answers. Communities own the bus. They decide where they are going, how fast and what route to take. The Centre brings expertise, tools and evidence to help navigate barriers, but the solutions are shaped by the people who live the experience every day. Climate, Housing and Health Collide: Extreme heat now affects 70 percent of Americans. Housing is central to how communities weather climate events, whether heat, cold, hurricanes or wildfires. But much of the existing housing stock was not built for the climate we are experiencing today, let alone the climate we will face in 2050. Seventy percent of the homes that will exist in 2050 are already built. Energy efficiency retrofits that sealed homes to save energy are now trapping heat. Communities are calling for a right to cooled air as part of habitability, just as heating became a requirement a century ago. But air conditioning every home is not the answer. Refuge spaces, community cooling centres, heat island mitigation and building design all have a role. The challenge is ensuring climate solutions do not fall disproportionately on low income residents who contributed least to the problem. Military Housing and Cultural Barriers: Over the past decade, military families have raised serious concerns about housing conditions. Mould, water damage, lead and poor maintenance are widespread. Military families face unique cultural pressures that make it difficult to report problems or advocate for repairs. Fear of repercussions for service members creates a chilling effect. Yet the cost of inaction is profound. A service member worried about their family's safety at home is a readiness issue. GUEST: Amanda Reddy Executive Director, National Centre for Healthy Housing https://nchh.org/ The Air Quality Matters Podcast in Partnership with Mann + Hummel https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Charity Partner - https://www.saferairproject.org/
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September 25 · 6 min
Energy Retrofits Don't Have to Ruin Your Air: What Irish Schools Teach Us
This week, we dive into a study published in Building and Environment titled The Impact of Energy Retrofit on Indoor Air Quality in Classrooms and Offices, to explore a question that fundamentally challenges how we think about building performance and climate action: What if the single biggest barrier to decarbonising our building stock isn't our lack of technology or ambition—but our complete failure to recognise that when we tighten buildings to save energy, we risk sealing in pollutants, moisture and carbon dioxide, turning our classrooms and offices into actively harmful environments unless we treat mechanical ventilation as an absolute physical necessity, not an optional luxury? Buildings in Europe are responsible for about 40 percent of our total energy consumption. If we are going to meet our climate and decarbonisation goals, we have to retrofit our existing building stock. There is no way around it. But there is a massive fear in our industry, and we have seen it happen time and time again, that when we tighten up these buildings to stop heat loss, we end up destroying indoor air quality. This Irish study is important because it did a rigorous pre and post retrofit evaluation of over 50 classrooms and offices, measuring CO2, fine particulate matter, nitrogen dioxide, temperature, humidity and a whole suite of volatile organic compounds. Key Topics Discussed: The One Week Snapshot Problem: The biggest methodological limitation is that the monitoring campaigns are only one week long per phase. A week is just a snapshot in time. It does not capture seasonal variations. If the pre retrofit monitoring happened during a mild windy week in autumn when the windows were open and the post retrofit monitoring happened during a freezing calm winter day with everything shut down tight, the weather and teacher behaviour would heavily skew the results. A classroom environment is highly dynamic. The number of students, the specific lessons being taught, and even the type of cleaning products being used can vary wildly from one week to the next. This is a critical limitation that must be acknowledged when interpreting the results. The VOC Wildcard: The study noted that while ventilation improved overall, the response of volatile organic compounds was highly variable across different buildings. Why? Because energy retrofits introduce new synthetic materials into the built environment. New insulation, new sealants, new paints and sometimes new carpets and furniture. These materials off gas chemical compounds leading to short term spikes in total VOCs, even when the overall ventilation rate is technically higher. This is a critical warning to our industry. We cannot just focus on the ventilation rate. We must also practice strict source control by selecting low emitting natural materials during retrofits where we can or perhaps increase ventilation rates in the early stages of habitation of these spaces. The Carbon Dioxide Victory: Carbon dioxide concentrations in the retrofitted classrooms actually reduced by an average of 28 percent. That is a massive improvement. And why did this happen? It happened because the retrofits did not just focus on insulation and air tightness. They actively integrated mechanical ventilation with heat recovery. The Particulate Matter Win: PM2.5 levels decreased by 27 to 30 percent in both classrooms and offices. Before the retrofits, the buildings exceeded the WHO daily average guidelines for PM2.5 on 48 percent of the monitored days. After the retrofit, that number dropped to 26 percent. This is a huge public health victory, likely driven by the high efficiency filtration systems in the new mechanical ventilation units and tighter building envelopes keeping outdoor traffic pollution from leaking in. The Impact of Energy Retrofit on Indoor Air Quality in Classrooms and Offices 10.1016/j.buildenv.2026.114963 (https://doi.org/10.1016/j.buildenv.2026.114963) The Air Quality Matters Podcast in Partnership with Mann + Hummel https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Charity Partner - https://www.saferairproject.org/
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#130
September 21 · 1 hr 16 min
Behind the Minister's Desk: What Politicians Actually Need from Scientists
This week, we sit down with Dennis Naughton, former Member of Parliament and Minister for Communications, Energy and Natural Resources in Ireland, to explore a question that fundamentally challenges how we think about science, policy and political decision making: What if the biggest barrier to transforming our built environment isn't our lack of scientific knowledge or technology—but our complete failure to recognise that the people who make policy decisions operate in a completely different world from researchers, and unless we learn to speak their language, translate evidence into clear actionable asks, and understand the brutal political realities they face, even the most overwhelming evidence will never make it through the door? Dennis brings a rare and fascinating perspective. He comes from science, having worked in food microbiology research, before spending over 28 years in Parliament. As a former Minister, he worked at the point where evidence, politics, public policy and implementation meet. Key Topics Discussed: The Three Audiences Problem: As a scientist, you are trained to communicate evidence to peers so they can repeat your study. As a politician, you have three completely different audiences. First, you have to convince your cabinet colleagues that this is a good idea, because if you don't have a majority, your proposal is dead. Second, you have to convince the finance ministry, because most policy changes have a financial cost. Third, you have to convince the public that this is worth doing. Researchers often present to policymakers as if they are speaking to technical experts. The evidence goes way over their heads. The facts don't change, but how you frame them must. The Blank Page Reality: One of the hardest decisions any minister can make is a decision with a blank page in front of you, with no evidence and no base whatsoever. Even partial evidence, even evidence with caveats, is infinitely better than nothing. When politicians work off a blank page, they go back to ideology. If the research community can provide even incomplete evidence, it gives policymakers a framework to start. But here's the reality. Politicians don't make evidence-based decisions. They make evidence-informed decisions. There are economic, social, cultural and political factors that must be weighed. Evidence is critical, but it's not the only input. The Six Question Framework: Every researcher needs to be able to answer six questions if they want policy impact. What is the problem you are trying to solve? Why is it a problem? How are you proposing to solve it? What is the policy ask? What is the difference if that policy ask is delivered? What is the barrier to implementing that policy? If you can answer those six questions and frame them in the context of the three C's, clarity, context and connection to people, you will have something powerful that resonates with both policymakers and decision makers. Political Capital is Finite: Politics is a rough business. You only have a certain amount of political capital. If you use it up on the wrong proposals, you are not heard. Worse, if you push something through cabinet and it fails in Parliament, or if it passes Parliament but the public revolts, you have burned capital and damaged your reputation. Every proposal a minister brings forward, they are putting their name, their reputation and their career on the line. That is why timing, framing and understanding the political landscape is everything. Ministers only bring proposals to cabinet when they know they will get approval. The skill is in reading the room, building the coalitions and presenting the case in a way that lands with peers, with finance and with the public. GUEST: Dennis Naughten https://www.linkedin.com/in/denis-naughten-77231112/ The Air Quality Matters Podcast in Partnership with Mann + Hummel https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (
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September 17 · 8 min
27 Member States, One Deadline: The Race to Transform European Buildings
This week, we dive into a landmark policy paper published in Building and Environment titled Integrating Health and Indoor Air Quality into European Building Policy: A Landmark Policy Shift, to explore a question that fundamentally challenges how we think about building performance and public health: What if the single biggest barrier to transforming our built environment isn't our lack of scientific knowledge or technology—but our complete failure to recognise that the very directive designed to decarbonise European buildings has, for decades, systematically ignored the health of the people breathing the air inside them, until now? Key Topics Discussed: The Directive Versus Regulation Problem: The biggest weakness of the EPBD recast is that it is a directive, not a regulation. The European Union cannot dictate exact binding indoor air quality numbers or ventilation rates. It is up to each of the 27 member states to write these requirements into their own national laws and building codes by May 2026. This is where the real danger lies. We are at risk of a heavily fragmented European market. Some progressive countries might adopt strict health-based limits, while others, concerned about short-term compliance costs for developers, might do the absolute bare minimum. A race to the bottom. The Paper Compliance Risk: There is a major risk of paper compliance, where buildings are designed and certified to meet high indoor environmental quality standards on paper, but in reality, the ventilation systems are turned off, uncommissioned, or poorly maintained once the occupants move in. Many member states simply do not have the technical infrastructure, the trained inspectors, or the enforcement mechanisms to monitor indoor environmental quality on an ongoing basis. Without strict enforcement and penalties, these new laws risk becoming toothless tigers. The RHEVA Model: To combat fragmentation, the authors make a strong call to action for member states to adopt a harmonised, health-based framework. They point to the REVA model, Indoor Environmental Quality Regulation, as the gold standard, ready-to-adopt framework. REVA recommends continuous monitoring of two key parameters: PM2.5 and CO2. PM2.5 is a direct measure of exposure to fine particulate matter, which has devastating long-term health consequences. CO2 serves as a real-time proxy for overall ventilation adequacy and airborne infection risk. Countries Leading the Way: Belgium has a history of air quality legislation dating back to 1946. In 2022, they passed a comprehensive law that treats indoor air quality in public spaces as a right-to-know issue, requiring monitoring, certification and public labelling. France is also leading by requiring indoor air quality monitoring in schools and nurseries to protect sensitive populations. These examples prove that robust, enforceable indoor air quality legislation is not only possible, but already happening. Integrating health and indoor air quality into European building policy: A landmark policy shift Building and Environment https://doi.org/10.1016/j.buildenv.2026.114508 The Air Quality Matters Podcast in Partnership with Mann + Hummel https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (
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#129
September 14 · 2 hr 2 min
Risk, Accessibility, and the Right to Safe Air: A Conversation with Plum Stone
This week, we sit down with Plum Stone, founder and CEO of the Safer Air Project, to explore a question that fundamentally challenges how we think about indoor air quality and accessibility: What if the single biggest barrier to transforming indoor air quality isn't our lack of scientific knowledge or technology—but our complete failure to recognise that millions of people living with chronic health conditions face invisible barriers to accessing public spaces every single day, and that fixing air quality for the most vulnerable fixes it for everyone Key Topics Discussed: The Lived Experience of Poor Air Quality: For people living with chronic health conditions, poor air quality is not an abstract future risk. It is a daily, immediate barrier to participation in public life. For someone with a compromised immune system, an underventilated classroom or meeting room can mean a week of illness, hospitalisation, or worse. For their families, it means constant vigilance, isolation, and the burden of protecting themselves when policymakers and building operators fail to act. This is not just a health issue. It is an accessibility issue. And yet, unlike wheelchair ramps or hearing loops, air quality remains invisible, unregulated, and largely ignored. Prevention as the Biggest Lever: Whilst the Safer Air Project started by advocating for people with existing chronic health conditions, Plum has come to see air quality as the single biggest lever we have to prevent chronic disease in the first place. Cardiovascular disease, stroke, dementia, asthma, and long term respiratory conditions are all driven by exposure to poor air quality. If we can push down on air pollution and airborne infection transmission, we give ourselves a real head start on prevention. This is not just about protecting the vulnerable. It is about reducing the growing burden of chronic disease on society and freeing up resources to invest in health, not just treat illness. Making the Invisible Visible: The first step to solving any problem is measuring it. The Safer Air Project is running a global campaign called Making the Invisible Visible, asking organisations to monitor air quality in public spaces and display that information transparently. If you are not measuring it, you are not managing it. And if you are not making it visible, people cannot make informed decisions about their safety. The campaign is simple. Monitor your air quality. Display your air quality. Commit to transparency. This is not just about CO2 numbers. It is about giving people the information they need to assess risk in real time, whether that is a vulnerable person deciding whether to enter a space, or a facilities manager realising their ventilation system is not performing as it should. The Role of Unions and Workplace Safety: Unions have been at the forefront of workplace safety for centuries, yet they have been almost entirely absent from the air quality conversation. That is starting to change. The Australian Council of Trade Unions has been a strong advocate, recognising that air quality is a workplace health and safety issue. Employers have a responsibility to provide safe working environments. That includes the air employees breathe. The new Model Code of Practice for the Control of Biological Hazards in the Workplace recognises biological hazards that transmit through the air. This is a huge step forward. But enforcement and implementation remain the challenge. Unions have the power to demand safe air for workers. And when you fix air quality for workers, you fix it for students, patients, and the public. GUEST: Plum Stone Founder and CEO, Safer Air Project https://www.saferairproject.org/ The Air Quality Matters Podcast in Partnership with Mann + Hummel https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Charity Partner - https://www.saferairproject.org/
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September 11 · 11 min
Not All Faults Are Equal: A Data-Driven Guide to Prioritizing Building Maintenance for Better Air
This week, we dive into a study published in Building and Environment titled A Scalable Framework for Impact Analysis of Faults on Indoor CO2 in Buildings, to explore a question that fundamentally challenges how we think about building maintenance and indoor air quality: What if the single biggest barrier to delivering healthy indoor environments isn't our lack of technology or standards—but our complete failure to recognise that the faults we routinely ignore in HVAC systems are actively degrading the air we breathe, and we've had no systematic way to prioritise which faults actually matter until now? Key Topics Discussed: The Correlation Versus Causation Problem: In a building, everything is connected. If you just look at raw data, you might see counterintuitive things. For example, when the outdoor air damper is wide open, CO2 levels might actually be higher. A simple correlation analysis might conclude that opening the damper causes CO2 to rise, which makes no physical sense. What's actually happening is demand controlled ventilation. The system opens the damper because CO2 is rising. High CO2 is causing the damper to open, not the other way around. It's a classic feedback loop. To get around this simultaneity bias, the researchers used a clever approach called double machine learning. They stripped away all the noise and confounding variables like building ID, time of day, weather and current CO2 baseline, so they could isolate the true causal impact of a specific fault on CO2 levels. The Worst Faults for Air Quality: The absolute worst fault for indoor air quality is an AHU discharge fan failure. When the fan isn't generating the static pressure needed to move air, supply airflow drops off a cliff and return air CO2 spikes. The next worst is a poorly tuned system where the outside air damper is oscillating wildly, constantly cycling back to its closed position, severely reducing the overall volume of fresh air entering the building. Then there are valve leaks. A leaking cooling valve causes the supply air temperature to drop too low. The control system opens the heating valve and closes the outside air damper to keep warm air in. Because of a leaking cooling valve, your fresh air intake gets choked off and indoor CO2 shoots up. A leaking heating valve does the opposite. It opens the outside air damper to take advantage of free cooling, which actually dilutes indoor CO2 and improves air quality, but at a massive energy penalty. Zone Level Faults: At the zone level, the worst fault is terminal unit airflow set point unreachable low. This is when the VAV box damper is stuck or there's a ductwork issue, and the actual airflow to the room is consistently lower than what the thermostat is asking for. You get localised underventilation and zone CO2 spikes dramatically because fresh air is simply not getting into the space. The Prioritisation Framework: In facility management, we are constantly bombarded with fault alerts. In a large building, you might have hundreds of alerts a day, and maintenance teams are almost always stretched thin. Without a way to prioritise those faults, you end up ignoring them or focusing only on the ones that trigger immediate comfort complaints. This paper provides an evidence-based, data-driven ranking that lets facilities teams prioritise maintenance actions based on their actual impact on both energy and indoor air quality. A scalable framework for impact analysis of faults on indoor CO2 in buildings https://doi.org/10.1016/j.buildenv.2026.114443 The Air Quality Matters Podcast Mann + Hummel https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon.
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#128
September 7 · 1 hr 56 min
Building Roadmaps for Healthy Schools: The Funding Gap and What We Can Do About It
This week, we sit down with Lisa Greenfield, Regional Programme Manager for the Midwest at the Centre for Green Schools at the US Green Building Council, to explore a question that fundamentally challenges how we think about educational environments: What if the single biggest barrier to transforming school air quality isn't our lack of scientific knowledge or technology—but our complete failure to recognise that schools need practical roadmaps, peer networks, and trusted voices who've walked the path before to turn good intentions into real world action? Coming from a family of educators and having spent almost 20 years in the classroom herself, Lisa brings a deeply personal perspective to this work. After developing allergic asthma from mold exposure in her own classroom, and later experiencing long COVID that kept her out of teaching for three months, she left the profession to make a bigger impact. Now she's building the infrastructure to help hundreds of school districts across the United States navigate the complex journey toward healthier indoor environments. Key Topics Discussed: The Fellowship Network: The Centre for Green Schools is launching its largest cohort yet, bringing on 53 fellows from public school districts across the country. These aren't consultants or outside experts. They're facilities managers, finance directors, operations staff, and district leaders who will learn together, implement the Energy Efficiency Indoor Air Quality Toolkit, and become mentors for the next wave. The goal is simple. Build a peer network where schools that have already navigated this journey can guide those just starting out. Because nobody wants to reinvent the wheel. They just need someone to hold their hand and show them what good looks like. The Stakeholder Ecosystem: Improving school air quality requires buy in from decision makers like superintendents and school boards, implementers like facilities managers, the teachers and staff who work in those buildings every day, the students who spend up to 10 hours breathing that air, and the parents who can become powerful advocates. Each group sees the problem through a different lens. But when you frame it properly, fiscal savings from reduced absenteeism, lower health insurance premiums, improved test scores, better teacher retention, the case becomes compelling across every stakeholder group. Schools as Workplaces: We often talk about children in schools, but teachers spend entire careers in these buildings. One in 13 students has asthma. But teachers are the ones who may develop COPD, allergic asthma, or long term respiratory illness from decades of exposure. Lisa's story is not uncommon. Too many educators have gotten sick from mold, poor ventilation, or chronic pathogen exposure. These are workplaces. Employers have a responsibility to provide safe environments. Yet air quality is rarely treated with the same urgency as fire safety, water quality, or food standards. The Funding Reality: American schools face a $90 billion annual funding gap. They are the second largest infrastructure in the nation after roads and highways. Most school funding comes from local real estate taxes, which creates massive inequity. Title I schools, rural districts, and tribal schools often lack the resources for preventative maintenance, let alone major HVAC upgrades. But here's the thing. You don't need to overhaul an entire system on day one. Start with ventilation and filtration. Measure what's happening. Make small changes. Be transparent. Show progress. The roadmap exists. The toolkit is free. The support network is being built. Funding often follows when expectations are set and schools demonstrate genuine effort. GUEST: Lisa Greenfield Regional Programme Manager, Centre for Green Schools, US Green Building Council https://centerforgreenschools.org/ The Air Quality Matters Podcast in Partnership with Mann + Hummel https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon.
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#127
August 31 · 1 hr 59 min
Green Buildings: Solar Panels on the Titanic - David Gottfried
This week, we sit down with David Gottfried, co-founder of the US Green Building Council and founder of the World Green Building Council, a movement now spanning 85 countries that has ignited a trillion-dollar green building economy. What if the single biggest barrier to transforming the built environment isn't our lack of scientific knowledge or technology—but our complete failure to recognise that green building, while extraordinarily successful, is still just putting solar panels on the Titanic unless we fundamentally rewire how civilisation values life itself? Key Topics Discussed: • The Unlikely Origins of a Movement: It's easy now with hindsight to forget just how unlikely the green building effort was back then. The idea that buildings could be designed, constructed and operated in ways that meaningfully reduced environmental impact was not a given. David walked into rooms as an early green building consultant and faced the same three developer questions every time. Will it slow my project down? Will it cost more? Will it even work? The movement spent years fighting that perception, proving that green buildings could be more profitable, lower risk, and deliver better performance. • From Green to Regenerative: Green building has become a multi-trillion dollar global movement. We have rating systems in 181 countries. We've saved monstrous amounts of energy. But the slope of climate change is still steep. CO2 is at 430 ppm when scientists say don't go past 350. Global population is 8.2 billion headed to 10. A billion people still have no electricity, no fresh water. Countries are dropping bombs. AI is consuming electricity at an exponential rate. Green building is flattening the curve, but it's not reversing it. We need to move beyond sustainability, which is neutral, and embrace regeneration. If you're 500 pounds overweight and you change your diet to be neutral, you're going to be 500 pounds till you die. We need to lose weight. We need to regenerate. • The Architecture of Love and the Codes for Life: David's new book, Regen360, synthesises decades of experience, 200 conversations with AI, 2,600 pages of transcripts, and a lifetime of reflection into 15 fundamental codes for regenerative civilisation. Each code is distilled into a simple equation. If it destroys life, then it is false. Truth equals oxygen. Love equals regeneration. Wealth equals health on planet Earth. These aren't abstract philosophies. They're operational frameworks for rewiring capitalism, governance, technology and human behaviour. The book is David's last lecture, his modern elder contribution, interwoven with personal stories, memoir, and a call to action for the next generation. • The Role of AI and the Next Generation: David used AI, specifically ChatGPT and Claude, as thought partners to synthesise his ideas, challenge his assumptions, and structure the book. AI can be the differentiator of governance, helping us move from the hot amygdala survival wiring to the smart prefrontal cortex. But AI also consumes electricity and CO2. The tool is phenomenal, but it creates externalities. The book is written for everyone, but especially for college students, the next generation who will inherit this mess. David is teaching sustainable finance at Stanford next spring, but he'll be talking to the soul in the student. He's sorry for the world his generation is handing over, but he's here to help, with tools, maps, compasses, and Regen Circles to create base camps for the change agents climbing the mountain of Earth. GUEST: David Gottfried https://regen360.net/ Author, Regen360: An Operating System for Regenerative Earth The Air Quality Matters Podcast in Partnership with MANN +HUMMEL https://www.mann-hummel.com/en.html Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website.
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August 20 · 5 min
Packed in Metal Tubes: How Smart Exhaust Systems Could Transform Air Quality on Trains
This week, we dive into a fascinating study published in Railway Engineering Science titled Study on Air Quality Improvements in Train Compartments by Coordinating Exhaust of Multiple Air Outlets, to explore a question that fundamentally challenges how we think about ventilation in mass transit: What if the single biggest barrier to protecting passengers on high speed trains isn't our lack of technology—but our complete failure to recognise that static, one size fits all ventilation systems can never deliver both thermal comfort and effective infection control across changing seasons? Key Topics Discussed: The Physics of Human Thermal Plumes: Most modern trains pump fresh conditioned air in from vents in the ceiling. But where does that stale air go? Usually it's exhausted through vents down near the floor. This study used CFD modelling to look at what happens if we rethink that. What if we coordinate exhaust at both the top and the bottom of the carriage? Human bodies create thermal plumes. We are basically 100-watt heaters and warm air naturally rises off us, carrying our exhaled breath upwards. In the summer, when the air conditioning is trying to cool the cabin, if you exhaust the air entirely from the top of the carriage, like near the luggage racks, you are working with that natural thermal plume. The hot, polluted air rises off the passengers and gets sucked right out of the top vents. The study found this significantly improves the cooling efficacy and efficiency. You aren't forcing hot air down past passengers to reach the floor vents. It also clears out pollutants near the passengers' breathing zones much faster. The Winter Problem: In the winter, the scenario flips. You're trying to heat the cabin. If you pull all the air out from the top vents, you are just sucking all that nice buoyant warm air straight out of the roof before it reaches the passengers, leaving their feet freezing. It creates massive temperature stratification and makes people incredibly uncomfortable. The study found that in winter, a 50 50 split using both the top and the bottom exhaust provides the best balance. The bottom exhaust pulls the warm air down to feet level, maintaining thermal comfort, while the top exhaust still helps capture the rising respiratory pollutants. The End of Static Ventilation Design: This proves that static one size fits all vent designs is dead. You cannot have a ventilation system that operates the exact same way in January as it does in July and expect optimal results for both comfort and importantly infection control. We need dynamic systems. If you want to truly manage the risk of airborne transmission in mass transit, while simultaneously hitting our net zero energy efficiency targets, train manufacturers and frankly designers of any large, densely occupied space, need to implement variable exhaust systems that adapt to the season, the thermal load and the occupancy. The Future of Mass Transit Ventilation: It's a brilliant example of how nuanced, targeted and responsive our ventilation strategies need to become to protect public health in the built environment, especially technical ones like trains. You can imagine the exact same thinking being applied to buses, to aeroplanes and so on. This is the frontier of mass transit air quality management. https://link.springer.com/article/10.1007/s40534-025-00398-0 The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon.
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#126
August 10 · 18 min
Is Peer Review Built on Sand? Why the 'Gold Standard' May Be Failing Air Quality Science
This week, I step back from the interviews to share a personal reflection on a question that has been nagging at me for some time, sparked by recent encounters with dubious manufacturer claims, the fallout from a prominent Cambridge professor scandal, and my own complicity in wielding peer review as a weapon against innovation: What if the single biggest barrier to progress in air quality and the built environment isn't a lack of good ideas or new technology—but our complete failure to recognise that the gold standard we use to validate truth, peer review itself, is fundamentally broken and built on sand? Key Topics Discussed: The Ideal Versus the Reality: In theory, peer review is the guardian of rigorous science. Experts with time and resources deeply interrogate methodology, check references, and provide robust feedback. Papers that genuinely move the field forward are accepted. But the mechanical reality of 2026 is very different. Manuscript submissions have exponentially outpaced the pool of available reviewers. Academics are trapped in a publish or perish hamster wheel. Peer review is unpaid, unrecognised, and unrewarded. Studies suggest just 10% of reviewers handle almost 50% of the global peer review workload. When you have a small pool of incredibly time poor reviewers who are fundamentally overwhelmed, corners get cut. The Business Model Problem: Over the last decade, there has been a massive shift towards open access and article processing charges. Publishers now make money based on volume, not subscription exclusivity. When authors or institutions pay upwards of two to four thousand pounds to publish a single paper, the publisher is financially incentivised to publish more, not publish better. This environment has given rise to paper mills, highly sophisticated profit driven organisations that manufacture fake or desperately low quality research and sell authorships to desperate academics who need to meet publication quotas. The AI Closed Loop: Paper mills are using generative AI at industrial scale to produce convincing fake papers that slip past exhausted human reviewers. In response to burnout, an increasing number of time poor scholars are using AI to read papers and write their peer reviews. We are rapidly approaching a closed loop where an AI writes a substandard paper to meet a human's academic quota, submits it to a profit driven journal, and another AI reviews and accepts it on behalf of a burned out human reviewer. The fundamental human element, the actual peer in peer review, is being automated out of existence. The Consequences for Our Field: In air quality, health and the built environment, bad data passing as peer reviewed science or misleading claims backed up by pseudoscientific marketing has real world consequences. It leads to bad public policy, misallocation of millions of pounds of funding, inadequate ventilation standards, poor building performance and ultimately public harm. We cannot afford a foundation built on sand. We need to rethink the metrics of academic success, recognise peer review as core scholarly labour that needs compensation, and create alternative pathways for validating independent innovation. If we know the traditional peer review monopoly is struggling, we cannot lazily dismiss independent lab data simply because it doesn't carry a specific journal's logo. The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon.
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August 7 · 5 min
Smart Cars, Cleaner Streets: How Hybrid Vehicles Could Read and React to Pollution Hotspots
This week, we dive into a comprehensive review published in the Science of the Total Environment titled Integration of Air Quality Monitoring Systems with Hybrid Electric Vehicles for Emissions Control in Smart Cities, to explore a question that fundamentally challenges how we think about urban air pollution: What if the single biggest opportunity to tackle air quality in our cities isn't just making vehicles cleaner—but transforming them into intelligent, mobile monitoring networks that actively adapt their behavior based on real-time pollution data Key Topics Discussed: Adaptive Green Zones: Currently, hybrid cars are incredibly smart internally. They switch between internal combustion engine and battery based on efficiency, charge levels, and acceleration. But they are completely blind to environmental conditions outside the windshield. Imagine integrating a miniaturised air quality monitoring system into the car using IoT sensors and vehicle to everything communication. If a smart vehicle drives into a heavily polluted urban zone, say outside a school at drop off time or a congested city centre, the onboard AI reads the local air quality data and automatically forces the car to switch entirely to battery power. It shuts off the combustion engine. It stops contributing to the local pollution hotspot instantly. AI Driven Eco Routing: By linking up with smart city infrastructure and using machine learning, these vehicles can use AI driven eco routing. Your GPS wouldn't just find the faster route. It could find a route that minimises your exposure to highly polluted areas, spreading the traffic load and protecting the occupants inside the cabin. It turns the vehicle from a passive polluter into an active dynamic participant in urban air quality management. The Technical Hurdles: It's not as simple as strapping a sensor to a bumper. We need incredibly robust, low cost sensors that don't lose their calibration every time a car goes over a pothole or experiences a shift in humidity. There's a massive communication challenge. Do we use 5G or DSRC? The latency has to be milliseconds for cars to communicate effectively. And then there's data privacy. Tracking a car's location, speed, and the air it's driven through raises questions. We need standardised, highly secure cryptographic protocols so that data can be shared with city infrastructure without compromising driver privacy. The Future of Urban Air Quality Management: This is the frontier. The future of clean air isn't just about sticking static expensive reference sensors on a few lampposts around the city. It's about leveraging the millions of vehicles already on the road, turning them into dynamic moving networks of data that physically alter how our cities operate in real time. It's a huge technical challenge, but the payoff for urban health could be transformative. A comprehensive review on the integration of air quality monitoring systems with hybrid electric vehicles for emission control in smart cities https://doi.org/10.1016/j.scitotenv.2025.180022 The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon.
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July 30 · 6 min
When Windows Become Hazards: How Heat Waves and Ozone Are Changing Indoor Air - #OT53
This week, we dive into a modelling study published in Environmental Science, Processes and Impacts titled Long-Term Prediction of Climate Change Impacts on Indoor Particulate Pollution, a case study of residential buildings, to explore a question that fundamentally challenges how we think about natural ventilation and climate adaptation: What if the single biggest barrier to maintaining healthy indoor air quality in the coming decades isn't just outdoor pollution—but our complete failure to recognise that rising temperatures are transforming our homes into chemical reactors that generate dangerous ultrafine particles right where we breathe? Key Topics Discussed: The Chemistry Problem: Initially, there is some good news. Because of tightening air pollution legislation globally, the baseline outdoor particulate matter, things like PM2.5 and PM10 from traffic and industry, is actually projected to decrease in Europe over the next century. But the chemistry of our indoor spaces is changing. As outdoor temperatures rise, outdoor ozone levels also rise. And as our homes get warmer, the emission rate of volatile organic compounds or VOCs from indoor furnishings increase. When ozone and limonene meet in your living room, they react, and they produce something called secondary organic aerosols, or SOAs, including particulate matter and things like formaldehyde. So while the overall mass of large particles coming in from traffic might drop, the chemistry happening right inside our homes is going to create a whole new soup of ultrafine particles. Extreme Weather Events: The study didn't just look at average days. It looked at extreme weather events, which we know are becoming more normal. They simulate a Saharan dust storm and an extreme heat wave accompanied by an ozone episode. During the simulated heat wave, they looked at typical human behaviour. We keep the windows closed during the day, and in the evening when it cools down, we throw the windows wide open to purge the heat. But during an ozone episode, when you open those windows in the evening, you are absolutely flooding your home with ozone. The simulation showed indoor ozone levels spiking dramatically, which then reacts with limonene to create massive spikes in secondary organic aerosols. The End of Natural Ventilation as We Know It: This fundamentally challenges our reliance on natural ventilation in the face of climate change. If opening a window to cool down means inviting in extreme heat, extreme ozone or a massive spike in particulate matter from a dust storm, we simply can't rely on that primary strategy anymore. The paper makes an incredibly compelling case that proper strategies of high efficiency filtration, decent ventilation systems and potentially even scrubbers for gases is going to transition from being a luxury in high end office buildings to perhaps an absolute public health necessity in even our residential homes. Our building envelopes may have to act as an environmental shield against increasingly hostile outdoor atmospheres. Long-term prediction of climate change impacts on indoor particle pollution– case study of a residential building in Germany https://doi.org/10.1039/d4em00663a The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon.
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#125
July 27 · 47 min
Ten Lessons from Indoor Air 2026 and a summer of conversation.
This week, I step back from the interviews to share a personal reflection on the conversations, themes and patterns that have emerged over the last few weeks, both on this podcast and in the halls and sessions of Indoor Air 2026 in Singapore. What if the single biggest barrier to transforming the built environment isn't our lack of scientific knowledge or technology—but our complete failure to recognise the deeply interconnected systemic, linguistic, economic and human forces that keep us locked in the same destructive cycles? Key Topics Discussed: The Linguistic Firewall: During the pandemic, we saw in real time how a single word could paralyse global action. The term airborne became a structural firewall. To an engineer, if a particle is suspended in the air and moves with the air currents, it's airborne. But to the medical community, airborne carries a very specific, high-consequence historical definition. Because of that deeply entrenched medical definition, the engineering and building science communities were effectively locked out of the operational response for months. The Tyranny of Efficiency: For the better part of the last 40 or 50 years, the dominant almost tyrannical metric in our industry has been efficiency. We chased energy performance relentlessly. Energy is a hard measurable cost. You get a utility bill every 30 days. It is incredibly difficult to put a hard financial number on human health. So we optimize for what we can measure. The Myth of the Average Person: We design multi million dollar HVAC systems to hold a massive commercial floor plate to a highly precise 21 degrees Celsius. The glaring problem is that the average person is a statistical ghost. When you design for the mathematical average, you are effectively designing for nobody. Instead of viewing human comfort and health as a single fragile optimal point on a graph, we need to view it as a geographical landscape. The Looming Energy Crisis: The IEA warns of the greatest energy security threat in history. When the grid is constrained, society panics. And when society panics about energy, the built environment is always the first casualty. We know exactly what this looks like because we've been here before. In the wake of the 1973 oil embargo, we sealed our buildings up, slashed ventilation standards and triggered an era of sick building syndrome. The temptation to repeat the mistakes of the 1970s is sitting right in front of us. This is an inflection point. The challenge for all of us is to hold our nerve and fiercely defend the invisible air that sustains us, ensuring that as the world changes around us and as the energy grid strains, we never again compromise the indoor environment. The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon. Chapters 00:00:00 Introduction: Reflections from Indoor Air 2026 and the Power of Conversation 00:01:30 The Crisis Cycle: Why We Design for Emergencies but Operate for Peacetime 00:04:07 The Airborne Language Barrier: When Medical Definitions Paralyze Engineering Action 00:07:11 The Tyranny of Energy Efficiency: How We Optimized Buildings for Spreadsheets Not Humans 00:11:49 The Myth of the Average Person: Why Designing for Statistical Ghosts Fails Everyone 00:16:44 The Comfort Paradox: Is Thermal Perfection Making Us Biologically Fragile? 00:21:46 The Invisibility Problem: Why Data Doesn't Move Hearts and How to Tell Better Stories 00:24:38 Proxies and Noise: The Double-Edged Sword of CO2 Sensors and Simple Solutions 00:27:47 The Accountability Gap: From Run-to-Failure to Mandatory Building Performance Checks 00:32:11 The Global South Crossroads: A Fleeting Window to Leapfrog Western Mistakes 00:35:33 The AI Energy Arms Race: When Data Centers Compete with Humans for Cooling Capacity 00:37:19 The AMR Connection: How Poor Ventilation Fuels the Antimicrobial Resistance Crisis 00:40:10 The Skilled Trades Bottleneck: Why the Workforce Crisis Is Our Greatest Limiting Factor 00:43:09 The 1970s Déjà Vu: Navigating the Energy Crisis Without Sacrificing Human Health Again
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July 23 · 6 min
From Vikings to Cowboys: How a Simple Story Made Kids 12x More Likely to Cool Down - #OT52
This week, we dive into a fascinating study from the University of Southampton and Hampshire County Council titled Preliminary Findings of Storytelling in Schools as a Pre-Heatwave Intervention to Enhance Children's Behaviour to Improve Thermal Comfort, to explore a question that fundamentally challenges how we think about overheating in schools: What if the single biggest barrier to protecting children from dangerous heat exposure in classrooms isn't just our aging building stock—but our complete failure to recognize that empowering children themselves to take simple adaptive actions could be the most immediate, scalable solution we have right now? Let's face it, our school building stock, especially in the UK, is ageing and frankly poorly equipped for the reality of modern summers. A massive portion of schools, about 40% in the UK like Hampshire, are scholar system buildings thrown up in the 1960s and 70s. They were lightweight with huge amounts of single-glazed windows and very low thermal mass. They were designed to keep kids warm in winter with absolutely no thought given for handling the 30 to 35 degree heat waves we are increasingly seeing. Key Topics Discussed: The Temperature Preference Gap: Children actually have a preference for lower temperatures than adults. Studies have shown their comfort temperatures are usually two to three degrees cooler than ours. But who controls the environment in a classroom? Who controls the windows, the blinds, the thermostats? The teachers. So you have adults with a higher thermal threshold making the environmental decisions for children who are already feeling the heat. Younger children, especially those in key stage one aged five to seven, just don't have the agency or confidence to change their environment. They aren't going to stand up in the middle of a lesson and say, Miss, I'm boiling, can I open that window? They just sit there. They overheat. Their cognitive performance drops off a cliff and they become exhausted. The Storybook Intervention: The researchers designed a low cost, incredibly creative intervention. They wrote a storybook called The Hottest Day at School. It's a simple, engaging story where different characters through history- a Viking in the North Sea, a gladiator in the Coliseum, and a cowboy in the Wild West- use different strategies to keep cool. The story focused on five key actions: using a fan, removing a layer of clothing, moving to the shade, opening a window, and finding a drink of water. The researchers set up a controlled study right before a yellow heatwave alert was issued by the UK Health Security Agency. The Results Were Fantastic: The children in the intervention groups, particularly the younger key stage one kids, were significantly more likely to take or want to take action to improve their thermal comfort. The kids who heard the story were nearly five times more likely to say they wanted to stay in the shade. They were almost eight times more likely to recognise they should drink cold water. And they were almost 12 times more likely to want to use a fan compared to the control group. They actively remembered and understood the behaviours modelled in the story Preliminary Findings of Storytelling in Schools as a Pre-Heatwave Intervention to Enhance Children's Behaviour to Improve Thermal Comfort https://doi.org/10.1016/j.buildenv.2024.112337 The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon. Chapters 00:00:00 Introduction: The One Take Format and the Overheating Schools Crisis 00:01:06 The Building Problem: Why UK Schools Weren't Built for Modern Summers 00:01:46 The Agency Gap: When Adults Control Environments Designed for Children 00:02:47 The Intervention: Teaching Thermal Comfort Through Story 00:03:13 The Study Design: Controlled Testing Before a Yellow Heatwave Alert 00:03:58 The Results: Five to Twelve Times More Likely to Take Action 00:04:44 The Bigger Picture: Why We Can't Wait for Billions in Retrofits 00:05:14 Behavioral Adaptation: The Overlooked Tool in Indoor Environmental Quality 00:06:11 From Passive Victims to Active Agents: Lessons for Air Quality
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#124
July 20 · 1 hr 58 min
From Aristotle to AI: Rethinking What 'Optimal' Really Means in Buildings - Ardeshir Mahdavi
This week, we sit down with Professor Ardeshir Mahdavi, an internationally recognised expert in building science, affiliated with Graz University of Technology and the Vienna University of Economics and Business, to explore a question that fundamentally challenges how we think about indoor environmental quality: What if the single biggest barrier to creating healthy, comfortable buildings isn't our lack of scientific models—but our failure to recognise that the search for optimal indoor conditions may be philosophically flawed from the start? Inspired by his thought provoking keynote at Indoor Air 2026 in Singapore, this conversation unpacks what happens when we bring philosophy, art and science together to critically revisit the prevailing paradigm in indoor environmental quality research. Drawing on insights from Aristotle, Leonardo da Vinci and Werner Heisenberg, Ardeshir challenges us to reconsider how we define adequate indoor environmental conditions, how we develop models to predict human comfort and health, and whether our obsession with precision is actually preventing us from understanding what truly matters. Key Topics Discussed: The Illusion of Sharp Lines: Standards and regulations draw precise thresholds for temperature, humidity, CO2, sound and light. But human requirements are not fixed. They vary by individual, by age, by health status, by time of day, by culture. We all agree people are different, yet we expect models to deliver universal answers. This cognitive dissonance shapes everything from thermal comfort research to building commissioning. Leonardo da Vinci's sfumato technique offers a metaphor: nature doesn't have sharp lines, and neither do human needs. Plateau and Escarpment, Not Bell Curves: The traditional view of human response to indoor conditions assumes a bell curve with an optimal peak. But research in lighting and other domains suggests a more accurate model is the plateau and escarpment. Over a wide range of conditions, performance remains stable. Health Versus Comfort, and the Ethics of Manipulation: Some argue that comfort is not necessarily healthy. That we should design buildings to challenge occupants thermally, to exercise their metabolic and immune systems. But who decides what is good for people? Designing stairs to be more attractive than lifts, separating buildings to force movement, installing acoustic masking systems without informing occupants. The Heisenberg Metaphor and Model Uncertainty: Heisenberg's uncertainty principle states that you cannot simultaneously measure the position and momentum of a particle with unlimited precision. The more precisely you know one, the less precisely you know the other. This offers a powerful metaphor for indoor environmental quality models. e60PBxooziVGttOyDIeN GUEST: Professor Ardeshir Mahdavi Graz University of Technology | Vienna University of Economics and Business Indoor Air 2026 The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon. Chapters 00:00:00 Introduction: Meeting Ardeshir Mahdavi and the Philosophy of Indoor Environmental Quality 00:02:35 The Risk of Narrow Focus: Why Building Science Needs Philosophical Thinking 00:15:55 Da Vinci's Sfumato: Sharp Lines Versus the Reality of Human Experience 00:22:45 The Problem with Precision: Standards, Negotiation and Boundary Conditions 00:36:16 Aristotle's Wisdom: Matching Methods to the Nature of the Inquiry 00:41:45 Models and Constructs: The Difference Between Weight and Comfort 00:50:01 The Plateau and Escarpment Model: Rethinking Distribution Curves 00:59:09 Physiology and Compensation: Why Humans Aren't Precise Instruments 01:03:17 Health Versus Comfort: The Ethical Question of What Buildings Should Provide 01:07:16 Manipulation and Agency: Staircases, Sound Masking and Cultural Differences 01:33:32 The Global South Challenge: Beyond Smart Buildings to Urban Systems 01:47:04 Heisenberg's Uncertainty: Precision Limits in Human-Centric Models 01:54:22 AI and Understanding: Tools Versus Delegation of Thinking
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July 16 · 10 min
When Heat Waves Meet Ozone: Why 1+1=3 for Stroke Mortality - #OT51
This week, we dive into a study published in the Journal of Environmental Research titled Summer Heat Wave, Ozone Pollution and Ischemic Stroke Mortality: An Individual Level Case Crossover Study, to explore a question that fundamentally challenges how we think about climate, air quality, and public health: What if the single biggest barrier to protecting vulnerable populations isn't our lack of understanding about heat waves or air pollution individually—but our complete failure to recognize that when they occur together, they create a deadly synergy that multiplies stroke mortality risk? Key Topics Discussed: The Perfect Storm for Clotting: When you are exposed to a heat wave, your body kicks into thermoregulation mode. You sweat, you lose water. And if you aren't replacing that water, your blood viscosity goes up. Your blood literally gets thicker, which promotes the formation of clots. At the same time, short term exposure to ozone enhances the blood coagulation process. It triggers systemic inflammation and oxidative stress. You have the heat making your blood thicker and the ozone promoting a chemical pathway for clotting. Put them together in a human body and you have the perfect storm for a cerebrovascular event. The Synergistic Effect: When you have a heatwave and high ozone levels at the same time, the effects don't just add together, they multiply. It's not 1 plus 1 equals 2, it's 1 plus 1 equals 3. The paper estimates that up to 4.19% of ischemic stroke deaths in their study could be attributed to these joint exposures, and the majority of those exposure attributed deaths were due to co exposure of extreme heat and high level ozone. The study tracked over 59,000 ischemic stroke deaths across four years in Jiangsu province, China. The Elderly Are Most Vulnerable: The study broke the data down by age and sex. While gender didn't make a huge difference, age absolutely did. The elderly, specifically those aged 85 and older, were at significantly higher vulnerability to these co exposure events. As we age, our thermoregulatory capacity declines. We don't sweat as much, our skin blood flow is reduced, so our bodies struggle to cool down. Older adults are much more likely to have pre existing conditions like hypertension or atherosclerosis. Add social isolation or limited mobility into the mix, meaning they can't easily leave a sweltering apartment or get to a cooling centre, and the risk profile skyrockets. The Ventilation Paradox: If we are relying on natural ventilation, opening windows to deal with summer overheating, what happens on the day when there is a heat wave and an ozone spike? You open up the window to let the heat out and you let the ozone in, or you keep the window closed to keep the ozone out and the building overheats. It reinforces the need for mechanical ventilation strategies with proper filtration and thermal conditioning in our homes, particularly in social housing and care facilities where the most vulnerable populations live. We cannot rely on building envelopes alone when the outside air is effectively dangerous on multiple fronts. Summer Heat Wave, Ozone Pollution and Ischemic Stroke Mortality: An Individual Level Case Crossover Study https://doi.org/10.1016/j.envres.2025.120818 The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon. Chapters 00:00:00 Introduction: The One Take Format and Compound Environmental Risks 00:00:35 The Study: Summer Heat Waves, Ozone and Stroke Mortality 00:00:53 Beyond Buildings: The Broader Public Health Question 00:01:20 Understanding Ischemic Stroke: The Second Leading Killer Globally 00:02:32 The Research Setting: 59,000 Deaths in Jiangsu Province 00:03:13 The Methodology: Comparing John to Himself, Not to Dave 00:04:08 The Findings: When 1 Plus 1 Equals 3 00:05:33 The Biology: Blood Thickening Meets Clot Promotion 00:06:29 Who's Most Vulnerable: The Elderly in the Eye of the Storm 00:07:24 The Built Environment Challenge: Windows Open or Closed? 00:09:03 The Future: Creating Safe Harbours From Deadly Outdoor Conditions
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#123
July 13 · 1 hr 32 min
From Infection Control to Indoor Air: The Global South Can't Wait Another Decade
This week, we sit down with Dr. Ranga Reddy Burri, a physician from Hyderabad, India, President of the Infection Control Academy of India, and Honorary Professor at the University of Hyderabad, to explore a question that fundamentally challenges how we think about public health in rapidly developing economies: What if the single biggest barrier to improving health outcomes in the Global South isn't a lack of scientific knowledge Key Topics Discussed: India's Demographic Window: India has a two to three decade window to get things right before the demographic dividend disappears. The fertility rate is declining. The young population bulge is shrinking. The population over 50 is growing. Within decades, India will have an inverted population pyramid with fewer productive workers supporting a graying population. Antimicrobial Resistance: The Silent Pandemic: Antimicrobial resistance is officially recognized by WHO as one of the top 10 global health threats. In some Southeast Asian countries, every second antibiotic prescription is now failing. Pathogens that once responded to antibiotics are now resistant, spreading through hospitals, communities, agriculture, food systems, and the environment. Without effective antibiotics, cancer treatments fail, transplants become impossible, and simple surgeries like cesarean sections or appendix removals turn deadly. The Convergence Between AMR and Indoor Air Quality: Indoor air quality and antimicrobial resistance are deeply interconnected. Poor ventilation accelerates infectious disease transmission, increasing antibiotic use and driving resistance. Without source control through improved indoor air quality, hand hygiene and antibiotic stewardship alone will never solve healthcare associated infections. GUEST: Dr. Ranga Reddy Burri https://www.linkedin.com/in/rangareddy/ Indoor Air 2026 https://www.indoorair2026.org/ The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon. Chapters 00:00:00 Introduction: Meeting Dr. Ranga Reddy Burry and the Global South Challenge 00:04:27 Breaking Down Silos: Why Indoor Air and Healthcare Must Converge 00:06:15 The Scale of the Crisis: Two Billion People and Competing Priorities 00:09:12 The Equity Problem: When Clean Air Is a Luxury Not a Right 00:11:06 India's Paradox: Economic Powerhouse Meets Public Health Crossroads 00:13:50 Growth at What Cost: Measuring Success Beyond GDP 00:16:39 Singapore as Model: Balancing Prosperity and Well-Being 00:18:30 Quick Wins and Big Impacts: The LPG Revolution and Sanitation Success 00:22:32 The Demographic Time Bomb: India's Two to Three Decade Window 00:26:17 Trading One Risk for Another: From Infectious Disease to Chronic Illness 00:30:47 India as Diabetes Capital: 600 Million People and Dropping Ages 00:32:55 The Westernization Trap: Finding India's Own Modern Future 00:34:13 Antimicrobial Resistance Explained: The Silent Pandemic Killing 10 Million Annually 00:37:53 The Magic Bullets That Stopped Working: Every Second Prescription Failing 00:49:54 The Quadripartite Approach: Human Health, Animal Health, Agriculture, and Environment 00:55:49 Superbugs Everywhere: From ICU Rails to Doctor's Hands 01:08:54 The AMR and Climate Change Parallel: Multi-System Crises Requiring Everything Everywhere All at Once 01:10:18 The Venn Diagram Overlap: Where Indoor Air and Infection Control Converge 01:12:08 Source Control: Why Air Quality Is Essential to Solving AMR 01:14:19 Making the Invisible Visible: Communication Strategies for Abstract Threats 01:20:08 Beyond Doomsday: Positive Communication About Misery Not Extinction 01:22:21 The Modern Medicine Reversal: What Happens When Antibiotics Fail 01:26:16 Risk Reimagined: When Simple Surgery Means Losing Your Leg 00:39:57 The Next Generation: Young Indians Choosing Quality Over Accumulation 00:47:50 Reverse Migration: When Young People Choose Rural Over Urban 01:29:24 From Science to Action: Converting Evidence Into Concrete Interventions 01:30:12 The Universal Desire: Healthy, Long, Productive Lives for All
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July 10 · 10 min
Beyond Asthma: Why Damp Homes Are a Mental Health Crisis We Can Measure - #OT50
This week, we dive into a groundbreaking longitudinal study published in the American Journal of Epidemiology titled Damp Housing Conditions as a Determinant of Psychological Distress: A Longitudinal Analysis of the British Household Panel Survey, to explore a question that fundamentally challenges how we think about housing and mental health: What if the single biggest barrier to addressing dampness and mould in homes isn't just the physical remediation—but our complete failure to recognise that damp housing is actively destroying people's mental health, day by day, window by window, condensation droplet by condensation droplet? Key Topics Discussed: The 9% Increase: Transitioning into a damp home is associated with a 9% increase in the odds of psychological distress. That's after adjusting for age, income, employment status, housing tenure, and whether the household lacked adequate heating. When you break it down by type, condensation is the single strongest predictor, carrying a 9% increase on its own. Damp walls and floors showed a 7% increase. Rotting windows or floors showed a 6% increase. A leaky roof showed no statistically significant effect on psychological distress. Why Condensation Hits Hardest: Condensation is highly visible. It's on your windows every morning. It's a daily, unavoidable visual reminder that something is wrong with your living environment. A leaky roof might be hidden away in the attic. But condensation is right there in your face, day in, day out. It's a constant stressor. The researchers found a clear dose response relationship. With each additional dampness indicator reported, the odds of psychological distress increased by an additional 4%. The strongest association was for a combination of condensation and rot in windows and floors, which shot the odds of psychological distress up by a staggering 25%. The Vicious Cycle: The researchers tested for bidirectionality and found it. Psychological distress was also associated with a higher likelihood of reporting damp housing down the line. Poor housing degrades your mental health, and degraded mental health makes it harder to cope, maintain your home, or fight for repairs, which leads to worse housing conditions. It's a complex, vicious cycle. Damp housing conditions as a determinant of psychological distress: a longitudinal analysis of the British Household Panel Survey https://doi.org/10.1093/aje/kwaf263 American Journal of Epidemiology The Air Quality Matters Podcast in Partnership with Particles Plus https://particlesplus.com/ Eurovent (https://www.eurovent.eu/) - Aico (https://www.aico.co.uk/) - Lindab (https://www.lindab.ie/) - S&P UK (https://www.solerpalau.com/en-uk/) The One Take Podcast in Partnership with SafeTraces (https://www.safetraces.com/) - Inbiot (https://www.inbiot.es/?utm_campaign=simon&utm_source=airqualitymatters&utm_medium=podcast) - Farmwood (https://farmwood.co.uk/) - iE Electronics (https://www.eielectronics.ie/) and iAir Group (https://iair-group.com/) Zehnder https://www.zehndergroup.com/en Do check them out in the links and on the Air Quality Matters Website. (https://www.airqualitymatters.net/podcast) If you haven't checked out the YouTube channel its here (https://www.youtube.com/@airqualitymatters-SimonJones). Do subscribe if you can, lots more content is coming soon. Chapters 00:00:00 Introduction: The One Take Format and the Mind-Housing Connection 00:01:14 The Study: 12 Years and 186,000 Person-Years of Data 00:02:18 The Fixed Effects Model: Tracking Housing Transitions 00:03:10 The Headline Finding: 9% Increase in Psychological Distress 00:03:32 Breaking Down Dampness: Four Distinct Indicators 00:04:19 Why Condensation Hits Hardest: The Visibility Factor 00:04:47 The Dose-Response Relationship: When Dampness Indicators Combine 00:05:43 Robust Science: Negative Controls and Bidirectional Testing 00:06:27 Real World Implications: Reframing Housing as Mental Health Infrastructure 00:07:47 Beyond Band-Aids: The Case for Performance-Based Solutions 00:08:41 The Risk Lens: Measuring and Validating Ventilation Solutions 00:09:14 A Call to Action: Environmental Determinants in Clinical Practice 00:09:40 Closing Thoughts: Safeguarding Dignity Through the Built Environment
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