The global built environment stands at a critical juncture in biosecurity, caught in a chronic cycle of post-crisis complacency where political will and capital investment evaporate precisely when proactive defense systems should be codified. In this episode of Air Quality Matters, I sit down with Brian Renda , Programme Director for the Built Environment, and Victoria Slaughter PPE Director, both representing Blueprint Biosecurity . Operating as an independent, philanthropically funded nonprofit, Blueprint Biosecurity approaches biological risks without the quarterly financial constraints of commercial enterprise or the political inertia of state agencies.

With human beings spending roughly 70% of their lives in residential environments—amounting to approximately 55 years of an 80-year lifespan—the domestic built environment represents the primary vector of chronic environmental exposure. On this episode of Air Quality Matters, Amanda Reddy, Executive Director of the National Center for Healthy Housing (NCHH) , brings an epidemiological perspective to the intersection of housing conditions, building science, and public health policy.

Scientific evidence alone does not enact public policy; rather, policy operates within a complex matrix of statutory processes, financial negotiation, and political risk management. In this episode of Air Quality Matters, I sit down with Denis Naughten , former Irish Minister for Communications, Energy, and Natural Resources and a 28-year parliamentary veteran with a foundational background in food microbiology research. Drawing from his dual perspective at the boundary between laboratory benchwork and Cabinet decision-making, Naughten deconstructs the institutional friction that prevents high-grade building physics, indoor air quality (IAQ), and epidemiological data from translating into legislative mandates.

In the latest episode of the Air Quality Matters Podcast, I sit down with Plum (Victoria) Stone , a seasoned policy professional and the founder of the The Safer Air Project , to discuss the critical intersection of indoor air quality, universal accessibility, and public health. She brings a decade of expertise in cancer and social inclusion policy alongside her own lived experience with a chronic health condition and shares her perspective on how the built environment frequently fails the very people it is designed to shelter. The conversation challenges the building physics and engineering sectors to move beyond theoretical compliance and confront the real-world, real-time consequences of poor ventilation on vulnerable populations and society at large.

The built environment often grapples with the technical mechanics of indoor air quality, yet implementing these systems in underfunded public sectors creates a distinctly complex operational challenge.

In the latest episode of the Air Quality Matters podcast, we address this systemic reality with LISA GREENFIELD , Regional Programme Manager for the Midwest for the Centre for Green Schools at the USGBC. With a twenty-year background as an educator, Lisa Greenfield brings a highly specialised, lived perspective to building physics and environmental performance. Her current professional focus centres on mitigating the environmental risks present in ageing, poorly ventilated school infrastructures across the United States.

The idea that buildings can be designed and operated to meaningfully reduce environmental impact is now a given in our sector. But 35 years ago, when the green building movement first began, developers viewed sustainability as an expensive hurdle that would inevitably slow projects down.

In the latest episode of the Air Quality Matters podcast, I sit down with David Gottfried , a pioneer who helped shape the global green building movement. As the co-founder of the US Green Building Council (USGBC) and founder of the World Green Building Council (WGBC), David has spent decades driving a trillion-dollar industry across 85 countries. Yet, despite this monumental success, his perspective on our current trajectory is sobering.

It is often the impromptu conversations in the hallways of conferences that spark the most profound realisations. That was the original seed for the Air Quality Matters podcast, and it holds true today. Following my time at the Indoor Air 2026 conference in Singapore, and after recent discussions with some of the brightest minds in our sector—including Lidia Morawska, Ranga Reddy Burri, and Ardeshir Mahdavi—I wanted to take a step back.

In our main episode this week, I pull together a personal reflection on ten distinct, yet deeply interconnected, takeaways from these conversations. It is a look at where our industry has been, the systemic friction we continue to face, and the colliding megatrends that will dictate the future of the built environment.

In the built environment sector, we spend a significant amount of time focused on the granular details: the algorithms, the exposure limits, and the sensor data. But occasionally, we need to step back and examine the fundamental assumptions driving our models.

This week on the Air Quality Matters podcast, we feature two distinct episodes that challenge how we think about risk, comfort, and building performance. First, a deep dive with Ardeshir Madhavi on the philosophical underpinnings of building science, followed by a One Take review of a critical study highlighting the compound threat of extreme heat and ozone pollution. Last in the 4 part from Indoor Air 2026 and ISIAQ

In the latest episode of the Air Quality Matters podcast, we step outside the traditional boundaries of the built environment to examine the critical intersection of public health, infection prevention, and indoor air quality. Joining the show is DR RANGA REDDY BURRI , President of the Infection Control Academy of India (IFCAI) of India and an honorary professor at the University of Hyderabad . Dr. Burri brings a vital perspective from the front lines of medicine in the Global South, offering a stark look at the systemic health challenges emerging alongside rapid economic development.

At the Indoor Air 2026 conference in Singapore, I caught up with William McQuade , Global Vice President of Government Affairs and Sustainability at Baltimore Aircoil Company as he approached the conclusion of his tenure as ASHRAE President. The reflective discussion highlighted how global trends are forcing a return to the fundamentals of building design: engineering for the people inside them.

The conversation around indoor air quality (IAQ) has fundamentally shifted. For decades, specialists in the built environment and public health sectors have highlighted the profound impacts of airborne pollutants on human health, often struggling to secure widespread regulatory traction.

In a recent episode of the Air Quality Matters podcast, I sat down with Lidia Morawska , Distinguished Professor at QUT (Queensland University of Technology) director of the International Laboratory for Air Quality and Health, and recipient of the 2025 Prime Minister’s Prize for Science in Australia. 

Scaling residential retrofit is one of the most complex structural challenges facing the built environment sector today. In this episode of the Air Quality Matters podcast, I sat down with Dr Ciaran Byrne C Dir , Director of National Retrofit, and Brian McIntyre , Program Manager for High Performance Building Technologies at the Sustainable Energy Authority of Ireland (SEAI). The conversation provides a clear window into Ireland's national strategy to decarbonise 500,000 homes and install 400,000 heat pumps by 2030, an ambitious project operating within a volatile global energy landscape.

The latest episodes of the Air Quality Matters podcast bring us two highly relevant discussions for professionals in the built environment. First, we get an exclusive preview of the upcoming Indoor Air 2026 conference in Singapore, featuring insights from the event's leadership team.

Following that, a rapid-fire One Take episode unpacks the surprising building physics behind a very mundane household task: drying laundry indoors.

In our main episode, I sit down with Rachel Hodgdon , President and CEO of the International WELL Building Institute (IWBI) . Through her work, Rachel leads a global movement focused on putting people first in real estate. The conversation delves into the mechanics of translating the deep science of indoor environmental quality into a workable reality for organisations of all sizes.

Rather than hiding from the complexity of healthy buildings or letting it paralyse progress, Rachel outlines how the sector can communicate effectively and drive widespread adoption.

The conversation surrounding indoor environmental quality frequently centres on particulate matter. While managing physical particles is vital, it addresses only one side of the atmospheric equation. In a recent episode of the Air Quality Matters Podcast, I sat down with Christopher Muller , Global Director of the High Purity Segment at AAF International (American Air Filter) , to demystify the complex world of gas phase air filtration.

The landscape of the built environment is shifting rapidly. What was once a conversation dominated solely by traditional ROI and basic energy efficiency has evolved into a complex, multi-dimensional challenge centered around embodied carbon, circular business models, and public health.

In our main episode, host Simon Jones sits down with Ben Jones, Associate Professor at the University of Nottingham and lead author of the newly updated CIBSE AM10: Natural Ventilation in Non-Domestic Buildings.

With more than two decades having passed since the last major revision in 2005, the landscape of building design, climate modeling, and sustainability has shifted dramatically. This conversation offers a fascinating look at the philosophy behind the new AM10 and the enduring role of natural ventilation in modern architecture.

Cast your mind back to the chaos of 2020. The sudden, desperate need for infection control turned the residential air cleaner market into the wild west. Fast forward to today, and while the panic has subsided, the landscape remains incredibly difficult for the average consumer, and even seasoned professionals, to navigate.

To make sense of this, I sat down with Danny Ashton the founder of HouseFresh, a consumer comparison and independent testing platform that has systematically assessed over 130 air purifiers.

First, we sit down with Jason Jones , Director of Air Quality Management at Fellowes Brands , to discuss what it actually takes to get commercial building owners to invest in healthy indoor spaces. Then, in our One Take segment, we unpack the highly anticipated—and somewhat controversial—2026 UK Department for Education guidance on school ventilation.

Indoor air quality is a silent crisis. To put it into perspective: poor air kills more people every two weeks than global conflicts do in an entire typical year. Yet, we still treat our buildings primarily as passive shelters—stacks of brick, glass, and steel designed for energy efficiency and aesthetic delight, often at the expense of the biological entities living inside them.