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 how elements like dynamic sunlight, water features, and vegetation can improve health and connect people with natural surroundings. The episode also touches on the challenges of integrating these concepts with traditional architectural practices focused on energy efficiency and durability.

Helena van Vliet Dipl.-Ing. AIA is an internationally recognized expert in Biophilic Design. She is a registered Architect, Consultant, Researcher, Educator, and Speaker focusing on the direct connections between human and bio-habitat resilience in built environments. In her designs, consulting work and teaching, she integrates insights from her 40 years of practice, as well as data from her ongoing research in evolutionary biology, cognitive neuroscience, biopsychology, and chronobiology.

https://www.helenavanvliet.com/
https://www.biophilly.org/
https://www.biophiliccities.org/

Thank you for listening to the Passive House Podcast! To learn more about Passive House and to stay abreast of our latest programming, visit passivehouseaccelerator.com. And please join us at one of our Passive House Accelerator LIVE! zoom gatherings on Wednesdays.

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, and collaborations with key organizations like NYSERDA and the International Passive House Association. The discussion also delves into the organization's goals for 2026, emphasizing workforce development, economic feasibility, and expanding beyond their traditional bubble. Carmel also highlights significant Passive House projects in New York and discusses her own consulting business, ZAZNRG, focusing on building operation and public education.

https://www.nypassivehouse.org/
https://zaznrg.com/

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 conversation covers specific techniques such as solar thermal, drain water heat recovery, and the importance of accurate data for system sizing. Despite the cost challenges, clients are moving towards electrification due to regulations and environmental motivations.

https://www.petersenengineering.com/

Join James on January 14th 2026: https://passivehouseaccelerator.com/events/101-domestic-hot-water-multifamily?date=2026-01-14

James Petersen, PE, is Owner and Principal of Petersen Engineering, an 18-person MEP/FP firm, with over four decades of experience designing integrated building mechanical systems. He brings a holistic approach that combines MEP design, building science, and enclosure coordination, and has served as principal-in-charge on more than 70 large Passive House projects. James currently volunteers as President of Passive House Mass and serves on the HCA Portsmouth Hospital Board of Directors.

Thank you for listening to the Passive House Podcast! To learn more about Passive House and to stay abreast of our latest programming, visit passivehouseaccelerator.com. And please join us at one of our Passive House Accelerator LIVE! zoom gatherings on Wednesdays.