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.

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

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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.

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.

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.

• 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

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.

• 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

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.

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GUEST:

Professor Ardeshir Mahdavi

Graz University of Technology | Vienna University of Economics and Business

Indoor Air 2026

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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.

• 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

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.

• 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

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.

• 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

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.

• 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

This week, we sit down with Bill McQuade, outgoing President of ASHRAE, to explore a question that fundamentally challenges how we think about progress in the built environment: What if the single biggest barrier to transforming buildings isn't our lack of technical knowledge—but our failure to put human health and wellbeing at the centre of every design, maintenance, and policy decision we make?

So a reflective conversation in many respects. A look at the year gone, but also a forward looking one full of optimism with a good dose of reality. He's put some big ideas forward this year. So a great opportunity to chat about these and what's next.

Key Topics Discussed:

• Designing for Life: The IEQ Mandate: Post pandemic, manufacturers had already developed air cleaning and IEQ products, but there was no demand for them. We reverted back to bad behaviors almost immediately. Bill wanted to codify those lessons learned and make sure indoor environmental quality doesn't get buried again in economic calculations. We build buildings for people, not for pretty plaques on the wall. We've done a great job on energy efficiency and carbon emission reductions. But we haven't focused on making buildings excellent from an indoor environmental quality standpoint. That's about the people in the building, not the building itself.
• The Five Pillars of IEQ: Air quality, thermal comfort, acoustics, lighting, and water quality. Water quality doesn't get enough attention. We assume the water coming into our buildings is safe and clean. It's not. The incidence of waterborne disease has continued to increase almost exponentially. Aging infrastructure, changes from chlorine to chloramines, and reduced water use in buildings without downsizing piping means water stays in pipes longer. Water age has been shown to be tied to increased incidence of waterborne disease because water spends more time in contact with biofilms. Without performance testing, these issues would never be found.
• The Center of Excellence for Indoor Environmental Quality: One of the first projects is developing a comprehensive IEQ standard that could be referenced in code or regulation.
• Existing Buildings Are the Real Challenge: New buildings are easy. We have the tools and approaches. Existing buildings are the challenge. There are very basic things we can do from an operational and maintenance standpoint that can make a big difference without infrastructure upgrades. But there's a real lack of knowledge by building operators and maintainers.
• Performance, Validation, and Accountability: AI is going to take building controls to a whole new level where buildings can adapt to changes in occupancy, notice when it's off its baseline, and alert you. Fault detection has been talked about for years, but AI will identify failures before they become faults. Low cost sensors for CO2, VOCs, water quality, acoustics, and lighting paired with AI will give accountability. If you're made aware things aren't right and you don't do anything, that's on you.

GUEST:

Bill McQuade

Outgoing President, ASHRAE | Global Vice President of Government Affairs and Sustainability, Baltimore Air Coil Company

https://www.linkedin.com/in/william-mcquade-a54b749/

ASHRAE https://www.ashrae.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.

• 00:00:00 Introduction: Meeting ASHRAE's Outgoing President Bill McQuade
• 00:02:19 Data Centers: The Energy and Infrastructure Challenge
• 00:13:23 Designing for Life: The Indoor Environmental Quality Mission
• 00:16:43 The Five Pillars: Air Quality, Thermal Comfort, Acoustics, Lighting, and Water
• 00:24:40 The Center of Excellence for Indoor Environmental Quality
• 00:27:19 The Scale of Complexity: From Science to Practical Implementation
• 00:36:08 Beyond Capital Investment: Health Outcomes and Societal Costs
• 00:40:40 Measuring Success: Feedback Loops and Performance Validation
• 01:02:14 Global Perspectives: Lessons from Traveling the World
• 01:23:22 The Future: AI, Innovation, and the Workforce Challenge