Passive House Podcast
Interviews with the leaders, practitioners, and change-makers in the global Passive House movement. A production of Passive House Accelerator.
Episodes
In this episode of The Passive House Podcast, Ilka Cassidy and Kristof Irwin discuss with Helena van Vliet the concept of biophilic design and its impact on human wellbeing. Helena explains how designing environments that reconnect humans with nature can optimize physiological energy and reduce stress and inflammation. The conversation delves into practical applications of biophilic design in urban environments, exploring ...
In this episode of The Passive House Podcast Mary James and Jay Fox chat with Carmel Pratt, the new executive director of New York Passive House. They explore Carmel's background in architecture and sustainability, her role at New York Passive House, and her approach to sustainability consulting. Carmel shares the rich history and milestones of New York Passive House, including notable policies, educational initiatives, an...
In this episode of The Passive House Podcast, co-host Mary James discuss Passive House practices with James Petersen, founder of Petersen Engineering. The episode focuses on domestic hot water systems and their electrification, particularly in the context of Passive House standards. Petersen explains the challenges with current technologies, options for heat recovery, and the impact of location-specific energy costs. The c...
In this episode of The Passive House Podcast, Jay Fox interviews Maggie Ullman, a Councilwoman from Asheville, North Carolina. Maggie shares her multifaceted background as a climate advocate, former sustainability director, and leader of a nonprofit network focused on sustainability in the Southeast. She delves into her experience running for office, the impact of Hurricane Helene on Asheville, and the city's recovery effo...
In this episode of the Passive House Podcast, co-hosts Jay Fox and Ilka Cassidy interview Ben Bogie, a third-generation high-performance builder and Director of Outreach and Education at BPC Green Builders. Ben discusses the foundational lessons learned from his family's history in building super-insulated, airtight, thermally broken structures since the 1970s. He shares insights into the evolution of high-performance buil...
In episode fourteen of The Reimagine Edit series of the Passive House Podcast, host Zack Semke shares selected clips of conversations from the Reimagine Collective. Featured speakers in this episode include Beth Campbell, Ryan Abendroth, Mike Fowler, Kevin Brennan, Kara Haggerty Wilson, Nakita Reed, and Michael Ingui.
In addition to specific deep dives into ventilation systems in hot and humid climates, designing for passi...
In this episode of the Passive House Podcast Matthew is joined by Caroline Ashe Brady, Ann Marie Fallon, and Nathan Campbell at the Passive House Association of Ireland Conference held in Belfast. They share their insights on the current state and future of Passive House standards in the UK and Ireland. Discover the driving forces behind the shift towards more reliable carbon data, the importance of policy in advancing sus...
In this Episode of the Passive House Podcast Matthew interviews representatives of Ecological Building Systems, including Niall Crosson, the Group Technical Director, and Neil Turner, the UK Technical Manager. They discuss the company's inception 25 years ago, its growth, and its innovations in bio-based construction and air-tightness solutions. The narrative also details their training programs and market challenges, part...
In episode thirteen of The Reimagine Edit series of the Passive House Podcast, host Zack Semke shares selected clips of insights from Al Mitchell, Kimberly Llewellyn, Greta Tjeltveit, Ya’el Santopinto, Wolfgang Feist, and Lisa White.
This episode is split between two topics. The first addresses one of the most common questions veteran members of the high-performance building community hear from those who are new to the indu...
In this episode of The Passive House Podcast, Mary James interviews James Hartford and Juhee Lee Hartford of River Architects in Hudson Valley. The discussion covers the firm's focus on Passive House projects, mostly single-family homes with a mix of new constructions and retrofits. They touch on their first retrofit project affected by Hurricane Sandy, the evolving client interest in Passive House standards, and the firm’...
In this episode of the Passive House Podcast co-host's Jay and Mary chat with Emily Mottram, founder of Mottram Architecture, about her architectural firm and her passion for building science and low-carbon residential architecture. Emily discusses her firm's focus on retrofits and new builds, explaining their approach to sustainable architecture using eco-friendly, bio-based materials. She shares insights on the complexit...
In this episode of The Passive House Podcast host Mary James meets with Katie Schwamb, Managing Director at Building Energy Exchange (BE-Ex) to discuss emissions reduction and compliance with Local Law 97 in New York City. Local Law 97, sets carbon emissions limits for buildings over 25,000 square feet to help achieve near-zero emissions by 2050. Mary and Katie cover the importance of strategic planning, financial incent...
In this episode of The Passive House Podcast, host Jay Fox talks with Andrea Michael, an architect from Love Schack Architecture in Bozeman, Montana. They discuss Andrea's comprehensive home retrofit, aimed at improving energy efficiency and comfort. The retrofit included air sealing, adding insulation, installing a heat pump, ERVs, solar panels, and more. The conversation highlights Andrea's journey from initial DIY effor...
In the twelfth episode of The Reimagine Edit series of the Passive House Podcast, host Zack Semke shares selected clips of insights from Jake Bruton, Ben Bogie, Michael Ingui, Ed May, Kristof Irwin, and Ashley Wisse.
This episode explores how practitioners across the Reimagine Buildings Collective are evolving the language and practice of high-performance building—shifting the focus toward health, comfort, and durability; t...
In this episode of The Passive House Podcast, host Mary James speaks with Kara Haggerty Wilson, Design Director at Onion Flats. Kara discusses the company's focus on scaling up deep energy retrofits. She highlights their journey from initial projects in Pennsylvania to more extensive work in Massachusetts, including the challenges and successes of projects like the 130-year-old Hano Homes retrofit. Kara shares insights on ...
This week on the Passive House Podcast we welcome Ben Walsham, the founder and director of ARKATA, based in Brunswick, Victoria. Trained in architecture and now a registered NatHERS Accredited Energy Efficiency Assessor, Ben empowers architects—as well as homeowners, builders, and developers—across Australia to create homes that are not only energy‑efficient, but comfortable, healthy, and resilient
With a backgroun...
In this episode of the Passive House Podcast, Ilka Cassidy and Kristof Irwin are at PhiusCon 2025, highlighting key sessions and interviews with industry experts. The conference explored a variety of themes including performance, purpose, and the power of community in the Passive House movement. Key takeaways included insights on air tightness, ventilation, innovative financing models, and the challenges and successes in s...
In this episode of the Passive House Podcast, Matthew Cutler Welsh talks with Matthew Crucifix, Director of Development at Stonewater, they discusses the organization's efforts in providing affordable and sustainable housing in the UK. Crucifix outlines Stonewater's expansive reach, managing around 40,000 homes, and their current focus on retrofitting existing homes to improve energy efficiency. Highlighting the financial ...
In this episode of the Passive House Podcast, Mary James and Ilka Cassidy interview Tony Lisanti, managing director at Integral Building and Design and QA/QC Manager for Phius. The discussion delves into various rating systems for high performance and passive houses, focusing on the HERS rating method, its standards, and applications. Tony explains his extensive experience in the energy and engineering fields and how he pr...
In the eleventh episode of The Reimagine Edit host Zack Semke strings together some pearls of wisdom from leading Passive House experts across three continents and include Martín Comas, Ed Ettinger, Lindsey Love, Joe Lstiburek, Tomas O’Leary, and Shefali Sanghvi. Each gem is selected from a conversation that took place inside the Reimagine Buildings Collective, either during one of the Reimagine Tuesday interviews or a Fri...
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