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Imagine a technology that could silently work in the background, destroying harmful microbes in the air we breathe without harming us. That's the promise of Far-UVC light at 222 nanometers, and groundbreaking room-scale research just brought this closer to reality.

Hospital-acquired infections alone cost the NHS £2.7 billion annually and affect hundreds of thousands of patients. While proper ventilation remains our first defense against airborne pathogens like TB, influenza, and COVID-19, the harsh truth is that many buildings struggle to meet modern ventilation standards. Retrofitting these structures often proves prohibitively expensive or physically impossible, creating an urgent need for complementary solutions.

Far-UVC technology stands out because, unlike traditional ultraviolet light, current evidence suggests it doesn't harm human skin or eyes when used properly. This means it could potentially operate in occupied rooms—a massive advantage over conventional UV systems. The University of Leeds study demonstrated remarkable results in a hospital room-sized chamber, with bacterial reductions of up to 97.8% using five Far-UVC lamps. Most impressively, the technology showed greatest benefit in poorly ventilated spaces, exactly where alternative solutions are most needed.

The research tested various scenarios, changing ventilation rates and airflow patterns while continuously introducing aerosolized bacteria to simulate a person shedding pathogens. Even at low ventilation rates of 1.5 air changes per hour, bacteria levels dropped to barely detectable amounts with five lamps. While further research is needed to test effectiveness against viruses in real-world settings, these results paint a promising picture of Far-UVC as a powerful new tool in our infection control arsenal. Could this technology transform how we protect vulnerable spaces like hospitals, schools, and nursing homes? The evidence suggests the future looks bright—or should we say, ultraviolet.

https://www.sciencedirect.com/science/article/abs/pii/S0360132325002161

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What happens when a pediatrician who codes and a psychologist studying technology acceptance walk into a built environment conference? Sometimes the most illuminating perspectives come from the margins.

In this episode, I sit down with Dr. Olivia Swan, a pediatric infectious disease consultant and data scientist, and Dan Bowers, head of Psychology at the University of South Wales, to explore the fascinating intersection of human behaviour, health, and our built spaces.

Livvy shares how her frustration with seeing the same children repeatedly hospitalised with respiratory issues from cold, damp homes drove her to harness data science to find solutions. "Preschool children are like canaries in the coal mine," she explains, with their rapid breathing rates making them particularly vulnerable to poor indoor air quality. These early exposures can set children up for lifelong respiratory problems, yet medical training rarely focuses on housing as a critical health factor.

Meanwhile, Dan reveals fascinating insights from his research on technology acceptance in social housing. What happens when new ventilation or heating systems are installed without adequate tenant engagement? The psychological dynamics of adoption become crucial, especially when residents lack agency in the decision-making process. "It's not just what the technology does," Bowers explains, "but what your neighbours and community think about it that drives acceptance."

The conversation tackles a perplexing question: why doesn't indoor air quality receive the same attention as other comparable health risks like smoking, despite causing similar harm? The invisible nature of air pollution creates a psychological blind spot, especially when many sources of indoor pollutants (cooking, candles, cleaning products) are associated with positive experiences.

This episode illuminates how truly interdisciplinary approaches might finally move the needle on these complex challenges. Whether you're a healthcare professional, work in housing, or simply care about creating healthier living environments, this conversation offers fresh perspectives on putting humans at the centre of the built environment.

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We explore a paper examining the future of residential air quality and its environmental justice implications. This research highlights how poor indoor air quality disproportionately affects disadvantaged communities, creating a "triple jeopardy" of higher exposure, greater health burdens, and limited resources to address the problem.

• Indoor air can be more polluted than outdoor air, with pollutants coming from building materials, cleaning products, cooking, and outdoor air infiltration
• We spend 90% of our time indoors, with 70% in our homes, making residential air quality crucial to our overall health
• The environmental justice framework examines who is exposed to pollution and why through five dimensions: distributive, procedural, recognition, capabilities, and epistemic justice
• Social inequalities lead to uneven exposure to poor indoor air quality, with lower socioeconomic groups often facing greater health risks
• Climate change will worsen indoor air quality through higher temperatures, humidity, and changing outdoor pollution patterns
• Net zero policies create tensions between energy efficiency and adequate ventilation for healthy indoor environments
• New technologies like air purifiers may create further inequalities if not accessible to all communities

Clean indoor air for everyone is both a technical and social challenge that requires bringing together researchers, policymakers, and communities to develop equitable solutions. See you next week.

Paper

Lead Author - D Booker

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Have you ever wondered what's really happening in the air around us? In this captivating conversation with Professor John Wenger of University College Cork, we dive into the hidden chemistry that shapes our atmosphere and affects our health in ways most of us never consider.

At the heart of our discussion is the fascinating world of hydroxyl radicals – nature's invisible cleaning crew that exists at just one part per trillion in our air yet drives fundamental atmospheric reactions. These tiny, highly reactive molecules transform pollutants, create ozone, and even influence cloud formation that affects our climate. Professor Wenger shares insights from the groundbreaking EU-funded Radical Project, which developed innovative sensors to detect these previously unmeasurable atmospheric components.

The conversation shifts to real-world air pollution challenges across Ireland, where Professor Wenger's research identified how solid fuel burning creates dangerous particulate pollution spikes during winter evenings. We explore how valleys like Enniscorthy can experience pollution levels rivaling those in heavily polluted global cities, though these spikes typically last just a few hours each evening. The good news? Low-cost sensor networks are revolutionizing our ability to identify these pollution patterns and empower communities with information.

Perhaps most compelling is our discussion about the pandemic's lessons regarding indoor air quality and the ethical questions it raises. Professor Wenger reflects on how vulnerable populations continue to face accessibility challenges in public spaces due to air quality concerns, drawing parallels to other accessibility rights issues. The episode highlights how understanding air chemistry isn't just academic – it directly impacts public health policy, building design, and even questions of social justice.

Whether you're interested in environmental science, public health, or simply curious about what's in the air you breathe, this conversation offers accessible insights into complex chemistry that affects us all. Subscribe to Air Quality Matters for more discussions that bridge scientific understanding with practical solutions for healthier environments.

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Radical Project 

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What drives someone to spend two decades studying the air we breathe indoors? In this conversation, I sit down with Asit Kumar Mishra, a research fellow at University College Cork, to explore the fascinating world behind the research that shapes our built environments.

Asit takes us on a journey from his early days as a mechanical engineering student in India to becoming an internationally recognized researcher in building ventilation, thermal comfort, and indoor air quality. Rather than focusing solely on research outcomes, this conversation delves into the process itself – the challenges, motivations, and profound satisfaction that comes from answering questions that directly impact people's health and wellbeing.

"Most of the days, probably 60-80% of the days will not end up as you expected," Asit reveals, highlighting the persistence required in scientific inquiry. Yet it's the human connection that keeps him coming back – whether explaining to worried parents how to protect vulnerable family members during a pandemic or discovering through conversations with schoolchildren that unexplained sensor readings were caused by dancing in the classroom.

The discussion shifts between practical research methods and philosophical reflections on knowledge communication. Asit, who describes himself as naturally introverted, finds unexpected joy in public engagement: "If I cannot explain it to an eight-year-old, then maybe I don't understand it well enough myself." This commitment to clarity resonates throughout his work, especially in his current project, developing classroom designs that can adapt to public health challenges without requiring school closures.

For anyone curious about how research shapes the spaces we inhabit, this episode offers rare insights into both the scientific process and the passionate individuals driving it forward. Tune in to gain a deeper appreciation for the intersection of engineering, public health, and the built environment that affects us all every day.

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The curious mind can transform an industry—and that's exactly what Rosie Wills has accomplished at Mid Devon Housing. Her journey from accidental investigator to sector-recognized expert offers a masterclass in how systematic curiosity can revolutionize approaches to persistent housing problems.

Starting with a simple desire to reduce tenant wait times for technical inspections, Rosie uncovered that damp and mold constituted the largest category of these inspections. Rather than accepting conventional wisdom, she developed data-driven systems that transformed response times from six weeks to just two. But she didn't stop there—she kept pulling threads, analyzing patterns, and challenging assumptions about how housing providers should approach these issues.

What emerges in this conversation is a refreshingly honest look at housing maintenance that puts tenants at the center while embracing technological innovation. Rosie shares how environmental monitoring sensors revealed hidden patterns in homes, allowing for targeted interventions rather than generic advice. She explains the value of keeping cases open for 12-18 months through full seasonal cycles, prioritizing actual resolution over administrative neatness. Most importantly, she demonstrates how technical expertise and human connection must work in tandem—spending an hour with a tenant during inspection might seem inefficient initially, but pays dividends in long-term success.

As the sector prepares for the implementation of Awaab's Law following a tragic death from housing conditions, Rosie's perspective on balancing compliance with genuine care couldn't be more timely. Her willingness to share her journey openly has created ripples throughout the housing community, demonstrating that expertise often grows not from formal qualifications but from persistent curiosity and a willingness to learn publicly.

Whether you work in housing, property management, or simply care about improving living conditions, this episode offers invaluable insights on using data to solve complex problems while never losing sight of the humans at the heart of it all. Subscribe now and join our growing community of curious professionals dedicated to making built environments healthier for everyone.

Rosie Wills - LinkedIn

Awaabs Law

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Carl Zimmer, columnist for the New York Times and acclaimed science writer, discusses his new book "Airborne" which explores the fascinating yet troubling history of how we understand disease transmission through air.

• Pandemic debates about COVID transmission revealed historical patterns of resistance to airborne disease theories
• William and Mildred Wells discovered in the 1930s-40s that diseases float in air droplets for hours but were largely forgotten by history
• The Wellses demonstrated UV light could effectively disinfect air and prevent disease transmission in classrooms
• Fred Meyer, who coined "aerobiology," pioneered research collecting microbes from airplanes and stratospheric balloons in the 1930s
• After WWII, much aerobiology research was classified and redirected into biological weapons programs
• Despite COVID raising awareness, momentum for improving indoor air quality standards is already fading
• Historical documents of scientific work are increasingly vulnerable as government webpages disappear or change
• Psychological barriers may explain our reluctance to accept that air can transmit disease

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Carl Zimmer 

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What happens when 46 research institutes from 21 countries join forces to tackle one of our most pressing indoor environmental challenges? A groundbreaking framework that's already changing how we approach air quality in our homes.

The Annex 86 project represents a fascinating convergence of engineering, chemistry, and public health expertise focused on creating energy-efficient indoor air quality management strategies for residential buildings. Over five years, this international team has developed innovative approaches to understanding, measuring, and improving the air we breathe at home without compromising energy efficiency.

During our conversation with project leader Jelle Laverge and task leaders Gaëlle Guyot and Marc Abadie, we explore how this collaborative effort has evolved from theoretical research into practical applications. The team shares insights on their development of comprehensive air quality metrics that are already being adopted by ASHRAE standards, the creation of the Pandora database cataloging thousands of indoor pollution sources, and the promising frontier of smart materials like Metal Organic Frameworks that can selectively absorb harmful pollutants such as formaldehyde.

Perhaps most intriguing is their concept of a "rating ecology" rather than just a rating system – acknowledging that effective indoor air quality management requires a complex, interconnected framework of tools and approaches. This ecological perspective allows for meaningful comparison between different technologies and strategies, from smart ventilation systems to advanced materials, helping designers and policymakers make informed decisions about improving our indoor environments.

Whether you're a building professional, policy maker, or simply someone concerned about the quality of air in your home, this episode offers valuable insights into how international collaboration is driving innovation at the intersection of health, comfort, and sustainability. Check out our sponsors in the show notes and join us in exploring how we can create healthier indoor environments for everyone.

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Gaelle Guyote

Marc Abadie

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The quality of air we breathe in our homes directly impacts our health, yet the ventilation systems responsible for delivering that air are failing at alarming rates. In this eye-opening conversation with Barry Cope, Group Managing Director of ATMA and SITMA, we delve into the troubling disconnect between air tightness testing (which has improved dramatically) and ventilation commissioning (which remains woefully inadequate).

Barry reveals the shocking truth that ventilation systems fail to meet even minimum performance standards, creating serious health risks for occupants. We explore the technical differences between testing methodologies and why accurate measurement matters—you wouldn't guess at electrical amperage or concrete composition, so why accept guesswork with something as vital as ventilation?

What makes this conversation particularly valuable is Barry's data-driven perspective. His organisation has collected over a billion data points on building performance, creating unprecedented insights into real-world system operation. This data revolution mirrors what's happening with environmental sensors being deployed in homes, leading us toward a future where ventilation systems automatically adjust based on air quality measurements rather than arbitrary timers.

The parallels to automotive safety standards are striking—just as we wouldn't accept cars with failing brakes, we shouldn't tolerate ventilation systems that don't deliver clean air. This isn't just about comfort; it's about preventing serious health conditions, including respiratory disease, cardiovascular problems, and even cognitive decline.

If you're building, renovating, or simply concerned about the air you breathe, this episode offers crucial knowledge about what's going wrong and how we can fix it. Listen now to understand why proper ventilation testing could literally save lives, and what changes are needed in regulations and industry practices to protect our health.

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The quality of air we breathe in our homes directly impacts our health, yet the ventilation systems responsible for delivering that air are failing at alarming rates. In this eye-opening conversation with Barry Cope, Group Managing Director of ATMA and SITMA, we delve into the troubling disconnect between air tightness testing (which has improved dramatically) and ventilation commissioning (which remains woefully inadequate).

Barry reveals the shocking truth that ventilation systems fail to meet even minimum performance standards, creating serious health risks for occupants. We explore the technical differences between testing methodologies and why accurate measurement matters—you wouldn't guess at electrical amperage or concrete composition, so why accept guesswork with something as vital as ventilation?

What makes this conversation particularly valuable is Barry's data-driven perspective. His organisation has collected over a billion data points on building performance, creating unprecedented insights into real-world system operation. This data revolution mirrors what's happening with environmental sensors being deployed in homes, leading us toward a future where ventilation systems automatically adjust based on air quality measurements rather than arbitrary timers.

The parallels to automotive safety standards are striking—just as we wouldn't accept cars with failing brakes, we shouldn't tolerate ventilation systems that don't deliver clean air. This isn't just about comfort; it's about preventing serious health conditions, including respiratory disease, cardiovascular problems, and even cognitive decline.

If you're building, renovating, or simply concerned about the air you breathe, this episode offers crucial knowledge about what's going wrong and how we can fix it. Listen now to understand why proper ventilation testing could literally save lives, and what changes are needed in regulations and industry practices to protect our health.

Barry Cope - LinkedIn 

BCTA

ATTMA

The Building Performance Hub

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Check out the Air Quality Matters website for more information, updates and more. And the YouTube Channel

The Air Quality Matters Podcast is brought to you in partnership with.

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SafeTraces & InBiot

All great companies that share the podcast's passion for better air quality in the built environment. Supporting them helps support the show.