Podcasts about Passive house

In this episode of the Passive House Podcast, Mary James and Ilka Cassidy speak with Joel Callow, building physicist and founding director of UK consultancy Beyond Carbon, about scaling certified Passive House delivery in London. Callow explains the firm's focus on whole life carbon, compact building forms, overheating avoidance, and early-stage design input, and notes the team has grown to 12 people with recruitment challenges as UK training ramps up via the Passive House Trust. He describes Beyond Carbon's role in helping major developer Barratt adopt Passive House—through lobbying, 12–18 months of R&D, and cost and constructability work—leading to thousands of units in the pipeline and an estimated 15–20,000 London dwellings in progress.https://www.beyondcarbon.uk/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.

Hey MTGA fans, we're excited for you to meet a good friend of ours, olease give it a listen! Mark Wille shares his journey from childhood in construction to becoming a leader in building science and education. Discover his insights on trades, education, leadership, and his innovative children's book series that aims to inspire the next generation of builders.Key TopicsJourney from childhood in construction to industry leaderThe importance of trades and vocational educationInnovative approaches to inspiring youth in constructionBuilding science and energy efficiency advancementsLeadership, mentorship, and community impactText the guys your ideas & feedback! Send us your feedback or topic ideas over on our social channels!Eric Aune @mechanicalhub Andy Mickelson @mick_plumbNewsletter sign up: https://bit.ly/MH_email

In this episode of the Passive House Accelerator Podcast, Ilka Cassidy chats with Marty Josten and Ashley Wisse of New Ecology. Marty and Ashley describe the nonprofit's 26-year mission to preserve and improve affordable housing through sustainability, building performance, health, and resiliency, using a hybrid fee-for-service and grant-funded model. They discuss evolving embodied-carbon requirements, regional market differences, misconceptions about Passive House cost, and innovations like drain water heat recovery, as well as engaging lenders and maintaining focus amid political and funding pressures.https://www.newecology.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 Accelerator podcast, Ilka Cassidy interviews Nathan Kipnis, founder of Kipnis Architecture and Planning in Chicago and Boulder, about his path from early solar architecture influences during the 1973 oil embargo to today's fact-based, certifiable Passive House practice. Kipnis explains how early rule-of-thumb passive solar design often led to overheating, and how building science and climate-specific approaches improved outcomes.  And describes his firm's “high design and low carbon” approach, evolving client communication from quietly implementing efficiency measures to showcasing performance and resilience through smart home monitoring, batteries, and high-quality envelopes.KAP websiteNHA websiteProject profile for Evanston's first Passive House in PHIUS' databaseCrain's Chicago Business Notable Leader in Sustainability 2025 recognitionThank 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.

“I don't understand why people build houses like this.” If you have ever said that on site after spotting a leaky junction, a sweaty wall, or a home that is freezing in winter and cooking in summer, you are not alone. This conversation is our pushback against the shortcuts that have become normal in the Australian building industry. The whole point of More Good and Less Bad is simple. Build better homes, make fewer mistakes, and deliver healthier, more comfortable results through better building performance and smarter decisions.We recorded this one at Pro Clima HQ in Sydney with Andy Marlow, director at Envirotecture and a certified Passive House designer. Andy has a rare ability to talk about sustainable building without the greenwashing and without making it feel like a lecture. The focus is on outcomes that matter to homeowners and builders alike. Homes that perform, homes that last, and homes that do not quietly fail behind the plaster.We also dig into the Living Building Challenge, because it is one of the few sustainability frameworks that does not let you cherry-pick the easy bits. It looks at the full picture of holistic sustainability in construction, including materials, energy, water, and health. Not because every project needs a badge, but because it forces better questions about what sustainable construction really means when you zoom out and look at long-term impact.Finally, we talk about making Passive House principles more buildable and accessible through Andy's Passive House Design and Construct model. Pre-designed, high-performance homes that still leave room for personal choice, without reinventing the wheel every time. We also share the lessons we have learned the hard way, and why building with intention is about mindset, systems, and balancing the ideal with what is financially feasible and genuinely buildable on real sites.

In this episode of the Passive House Podcast, Michael Ingui and Ilka Cassidy to share their interview with Dr. Wolfgang Feist from the 35th International Passive House Conference in Essen and discuss where Passive House is headed. Dr. Wolfgang Feist emphasizes focusing on documented, evaluated projects, the importance of integrated component systems. Looking back, he credits early collaboration with Swedish researchers and the push to build real demonstration projects, and he reiterates that the five principles remain unchanged because “physics is right.” 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 Ilka Cassidy and Michael Ingui, are at the International Passive House Conference in Essen and share rapid-fire interviews focused on scaling Passive House. With questions based on Michael's presentation at the conference focusing on moving Passive House from niche to necessary by reframing it as risk mitigation and engaging adjacent sectors like insurance, real estate, finance, and policy. Interviewees describe scaling through large-volume delivery, education,  supportive codes and incentives, and manufacturer-led training.With interviews from:Tomas O'LearyAnn-Marie FallonKen LevensonAlexander Gard-MurrayIn ChoFrancesco NesiGünther JedliczkeEsra AydinogluThank 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

Get in touch - leave me a messageWhat if better buildings are one of the most practical climate resilience tools we already have?In this episode of Climate Confident, I'm joined by Darren Macri, Co-CEO of Wythe Windows and rising president of the Passive House Network. We talk about why passive house is not just a building standard, but a practical climate tech pathway for decarbonisation, emissions reduction, energy security, healthier homes, and a more resilient built environment.You'll hear why buildings can cut heating loads by up to 90% through airtightness, better insulation, mechanical ventilation, thermal bridge-free design, and high-performance windows. We dig into how this shifts passive house from a niche green design idea into something far more urgent: infrastructure that helps people stay safe during outages, heatwaves, storms, and fires.You might be interested to learn how leaky buildings can make wildfire damage worse, how poor windows contribute to mould, noise, asthma, and energy poverty, and why retrofitting existing building stock may matter even more than making new builds cleaner. Darren also explains why adoption is often blocked less by technology than by training, policy, codes, business habits, and fragmented construction practices. Imagine that: the physics works, but humans still need meetings.We also cover affordability, net zero, the energy transition, local manufacturing, and why better buildings can reduce bills while improving comfort and health.

In this episode of The Passive House Podcast, Matthew Cutler - Welsh interviews Elizabeth and Everett Norris from their newly completed Christchurch home. They describe their Port Hills site on Huntsbury Hill, bought after the 2011 Canterbury earthquakes, and discuss the area's microclimate and west–northwest-oriented design. They share challenges including long build times, working largely solo, living on site after a robbery,  and more. They detail the key lessons on early builder input, avoiding rushed window orders, daylight implications of eaves, and airtightness detailing.https://www.designmake.co.nz/people.htmlhttps://www.everhomes.co.nz/blank-1About their amazing straw bale Passive House in Christchurch: https://sustainableengineering.co.nz/casestudy/norris-strawbale-passive-house/

We are joined by Ian Pritchett of Greencore Homes to talk about his science-based approach to green building and the work that has led him from developing green building materials becoming the co-founder of a vertically-integrated developer and house builder.There's a lot of history and legacy to cover because Ian has been in the green building game for decades and it's this that has informed the approach being taken right now.Greencore is also challenging the Passive House Institute about the accuracy of its PHPP (passive house planning package) modelling software because their homes outperform the model's predictions because of their use of phase-change materials.Be warned, this is nerd business—Jeff gets to interrogate the build up specification—but it doesn't get too technical to be able to follow the thread.Notes from the showThe Greencore Homes website Ian Pritchett on LinkedIn A PH+ article about Neil May**SOME SELF-PROMOTING CALLS TO ACTION**We don't actually earn anything from this podcast, and it's quite a lot of work, so we have to promote the day jobs.Follow us on the Zero Ambitions LinkedIn page (we still don't have a proper website)Jeff and Dan about Zero Ambitions Partners (the consultancy) for help with positioning and communications strategy, customer/user research and engagement strategy, carbon calculations and EPDs – we're up to all sortsSubscribe and advertise with Passive House Plus (UK edition here too)Check Lloyd Alter's Substack: Carbon UpfrontJoin ACANJoin the AECB Join the IGBCCheck out Her Retrofit Space, the renovation and retrofit platform for women**END OF SELF-PROMOTING CALLS TO ACTION**   

What happens when you try to turn a 100-year-old home into a high-performance, sustainable space - without touching the exterior?Many of our cities are filled with buildings that are over a hundred years old. The question is no longer whether we keep them - but how we make them work for the future.Jenny Peysin, is an architect in New York who specializes in renovating historic homes while bringing them up to modern performance standards like Passive House.In this conversation, you'll hear what it actually takes to turn an old building into something that feels healthier, quieter, more efficient, and more comfortable to live in. We talk about the tension between preservation and performance, how to make smart decisions when every inch and every dollar matters, and why sustainability is often just as much about quality of life as it is about energy use.If you're renovating an older home, thinking about buying one, or designing residential spaces yourself, this episode will give you a much clearer sense of what to protect, what to upgrade, and where sustainability really starts.To explore more about Jenny Peysin and her work, you can follow her on ⁠Linkedin⁠ and ⁠Instagram⁠ @jennypeysinarchitecture, or visit her website ⁠jpeysin-architecture.com⁠Join me, Ladina, on this green journey, and don't forget to subscribe for more insightful conversations about sustainable living and architecture and drop us a review. If you have suggestions for future guests or topics, I'd love to hear from you on my socials!Let's explore the world of green architecture, one conversation at a time.Contact: Ladina ⁠⁠@ladinaschoepf⁠⁠Website: ⁠⁠⁠⁠buildinggreenshow.comProduced by: ⁠⁠marketyourarchitecture.com⁠

Hello! This is Episode 399, and in it, I’m continuing my conversation with HOME Method members Jan and Landon, who are building a new home and granny flat as a Passive House in Sydney’s north. As a reminder: Jan and Landon are building on a site that has been in Landon’s family for over 70 years. Their new build project has been driven by clear goals around ageing in place, sustainability and lifestyle alignment, and they’ve worked collaboratively with their architect and builder throughout their project, involving their builder during pre-construction as well. [For all resources mentioned in this podcast and a free, downloadable PDF transcript, head to www.undercoverarchitect.com/399] This is Part 2 of the conversation you heard in Episode 398, so if you haven’t listened, you’ll find it at www.undercoverarchitect.com/398. And if you’re new to their story, I’d really encourage you to start at the beginning, because following their journey from the very first episode makes this one even more meaningful. We’ll pop all the links you need in the resources for this episode. In the last episode, we heard all about their construction progress, and how their builder’s prefab wall cassette system put the entire shell of their home up in just five days. In this episode, we kick off the conversation with a reflection on something that’s been really striking to witness, and that’s the sense of calm and confidence Jan and Landon have brought to this project. I ask them directly how they’ve arrived at that place, and what’s helped them trust their own decisions, even when those around them expected them to feel anxious. We talk about where they’re up to with their interior selections. This can be a stage that trips up a lot of homeowners, however Jan has taken a really thoughtful approach here, and it’s a wonderful example of knowing when to wait for more information before committing to a decision. We also cover the delightful surprises that construction has brought, the beautiful relationships that have formed with their architect and builder along the way, and I ask Jan and Landon what they are most proud of, and the advice they’d give to anyone who is right at the beginning of their own project journey. If you haven’t heard the previous instalments of Jan and Landon’s story, you can find them at www.undercoverarchitect.com/338, www.undercoverarchitect.com/339, www.undercoverarchitect.com/367 and www.undercoverarchitect.com/368. Remember, if you’d like to grab a full transcript of this episode, you can find that by heading to www.undercoverarchitect.com/399. Now, let’s dive in! RESOURCES MENTIONED IN THIS PODCAST: For links, images and resources mentioned in this podcast, head to >>> www.undercoverarchitect.com/399 Accessing my free '44 Ways' E-Book will simplify sustainability and help you create a healthy, low tox and sustainable home. You can download your free copy here >>> www.undercoverarchitect.com/ways Access the support and guidance you need to be confident and empowered when designing, renovating or building your future home inside my signature online program, HOME Method >>> https://undercoverarchitect.com/courses/the-home-method/ Just a reminder: All content on this podcast is provided by Undercover Architect for reference purposes and as general guidance. It does not take into account specific circumstances and should not be relied on in that way. You should seek independent verification or advice before relying on this content in any circumstances, including but not limited to circumstances where loss or damage may result. The views and opinions of any guests on the podcast are solely their own. They may not reflect the views of Undercover Architect. Undercover Architect endeavours to publish content that is accurate at the time it is published, but does not accept responsibility for content that may or has become inaccurate over time.See omnystudio.com/listener for privacy information.

Send us Fan MailIn this episode, Matt Carland from Carland Construction shares his journey from aspiring surgeon to builder, and how it led him to focus on sustainable, high-performance homes.The conversation explores key challenges in the construction industry, including skills shortages, licensing, and the influence of social media. Matt also highlights the importance of mental health and mindfulness for long-term success.We dive into Passive House principles—airtightness, insulation, and thermal bridging—and how they are shaping better building practices in Australia.The episode also covers motivation and reward systems for apprentices, financial literacy for builders, and the realities of managing workload, setting boundaries, and avoiding overcommitment. Matt shares practical insights on planning, client communication, and making smarter financial decisions to grow a sustainable business.EPISODE HIGHLIGHTS  Sustainable and high-performance building focus  Mental health and mindfulness in construction  Passive House principles and building standards  Skills shortages and licensed trades  Financial literacy and scaling a building business  Work-life balance and avoiding overbooking  Planning and client communication LEARN MORECarland Construction: https://www.carlandconstructions.com/ Sustainable Builders Alliance (SBA): https://www.thesba.com.auBROUGHT TO YOU BYThis episode is proudly brought to you by Craftwood Hardwood, Wunderbuild, and Powerhaus.

“Legally, you can still build a house with no membrane.”That line from Villy Yordanov, Pro Clima's Innovation Engineer, sets the tone for this conversation about what is technically allowed versus what actually leads to durable, healthy homes. We unpack the gap between building compliance in Australia and real-world building performance, particularly in weatherproofing, moisture management, and the building envelope.A big focus is the NCC 2025 changes and how some cladding types can bypass performance solutions. On paper, that can look like simpler compliance. On site, it can create risk if builders assume “compliant” automatically means “safe” or “long-lasting”. We talk about why National Construction Code updates matter for builders, and how small decisions in wall systems can lead to big problems later like leaks, mould, and expensive rectification work.We also break down what membranes actually do in modern construction. They are not just there to “stop condensation”. They are part of a complete building envelope system that helps control water, air, and vapour. Alongside correct detailing, taping, penetrations, ventilation, and airtightness, membranes support durability, moisture safety, and better indoor comfort. If you are interested in building science, high-performance homes, or Passivhaus and Passive House principles, this episode connects the dots in plain language.Finally, we look at why warm climates are not a free pass. Tropical building in Australia brings extra humidity and a higher moisture risk, which makes good detailing even more important. The takeaway is simple. Builders who keep learning, understand systems, and treat weatherproofing as a whole-of-wall approach will build better homes and avoid costly failures. If you want practical insight into NCC compliance, membranes, airtight construction, and moisture control in the Australian construction industry, this one is worth a listen.

In this episode of the Passive House Podcast Jay Fox interviews Vermont filmmaker Allie Rood about her documentary Prickly Mountain and My Design Build Life, which traces the design-build architecture movement that began in Warren, Vermont around 1963 and influenced design-build programs nationwide. Rood explains her personal connection through her father's work in the community, the movement's roots among Yale architects reacting against the designer/builder class divide, and ideas like Dave Sellers' “Wild Beam Theory” of improvisational building. She contrasts early sculptural ski houses with a later sustainability-focused generation behind the Dimetrodon co-housing project and discusses Yestermorrow's emergence as a design-build school. Rud also recounts the film's 10-year production, funding and grant challenges, finding an editor, shifting to a personal narrative, and current festival distribution and screening plans.https://allieroodfilms.com/Trailer for the film: https://vimeo.com/1125499443?fl=pl&fe=sh Reimagine Buildings: Designing for Survivability: https://events.ringcentral.com/events/reimagine-buildings-survivability/registrationThank 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.

We sit down with Michael Quast, CEO of Passive House Canada, for a conversation that blends deep insight with plenty of laughs. We explore his journey into the role, the organization’s mission, and the upcoming conference shaping the industry. Along the way, we dig into the realities of Passive House adoption in Canada—politics, barriers, and momentum—while keeping things light, human, and optimistic about where high-performance building is headed. Powered by Shift & hosted by Chris Palliser, The Solar PVcast is a podcast exploring solar power and the role it plays in improving our lives and our planet. For all your solar, BIPV and energy Storage needs visit shift.caSee omnystudio.com/listener for privacy information.

Hello! This is Episode 398, and in it, I’m speaking with HOME Method members Jan and Landon, who are back to share an incredibly exciting construction update on their passive house new build in Sydney’s north. This is the fifth instalment of Jan and Landon’s journey on the podcast. They’ve been sharing their story with us across Episodes 338, 339, 367 and 368, and if you haven’t heard those yet, I’d really recommend starting there to get the full picture of how this project has come together. [For all resources mentioned in this podcast and a free, downloadable PDF transcript, head to www.undercoverarchitect.com/398] As a quick recap: Jan and Landon are building a new home and granny flat as a Passive House in Sydney’s north, on a site that has been in Landon’s family for over 70 years. They’re both in their 70s and are building with very clear goals, to age in place well, to live sustainably, and to create a home that’s deeply aligned with their values and lifestyle. As retired teachers, they’ve brought a wonderful learning mindset to this project. They joined HOME Method in January 2024 and have used it as a real foundation for their preparation and decision-making all the way through. When we last caught up in Episodes 367 and 368, the project was well into design and the early stages of construction. Now, things have moved very quickly, and the home is actually taking shape before their eyes. Jan and Landon are living on the neighbouring lot to their construction site, so they can quite literally look out the window and watch their home going up. One of the most compelling parts of this episode is hearing about the prefabricated wall cassette system their builder uses, and what that’s looked like in practice on site. In earlier episodes, we introduced this system in concept. Jan and Landon walk us through the reality of it: visiting the panels being built in the factory, seeing the manufacturing drawings that translate the architect’s plans into something that can be precision-built offsite, and watching the entire shell of the house go up in just five days with a crane and a dedicated team. It’s a fascinating, real-world account of what this construction methodology involves, and of how the precision and accuracy embedded in every stage of that process directly supports their passive house goals. Plus, they share loads more helpful insights I know you’ll find super helpful for your project. If you haven’t heard the previous instalments of Jan and Landon’s story, you can find them at www.undercoverarchitect.com/338, www.undercoverarchitect.com/339, www.undercoverarchitect.com/367 and www.undercoverarchitect.com/368. Remember, if you’d like to grab a full transcript of this episode, you can find that by heading to www.undercoverarchitect.com/398. Now, let’s dive in! RESOURCES MENTIONED IN THIS PODCAST: For links, images and resources mentioned in this podcast, head to >>> www.undercoverarchitect.com/398 Accessing my free '44 Ways' E-Book will simplify sustainability and help you create a healthy, low tox and sustainable home. You can download your free copy here >>> www.undercoverarchitect.com/ways Access the support and guidance you need to be confident and empowered when designing, renovating or building your future home inside my signature online program, HOME Method >>> https://undercoverarchitect.com/courses/the-home-method/ Just a reminder: All content on this podcast is provided by Undercover Architect for reference purposes and as general guidance. It does not take into account specific circumstances and should not be relied on in that way. You should seek independent verification or advice before relying on this content in any circumstances, including but not limited to circumstances where loss or damage may result. The views and opinions of any guests on the podcast are solely their own. They may not reflect the views of Undercover Architect. Undercover Architect endeavours to publish content that is accurate at the time it is published, but does not accept responsibility for content that may or has become inaccurate over time.See omnystudio.com/listener for privacy information.

On this episode of Commercial Construction Coffee Talk (CCCT), we sit down with Darren Macri, Co-CEO of Wythe Windows, a U.S.-based manufacturer of high-performance triple pane tilt-turn windows and doors built for both residential and commercial projects.Manufactured just 29 miles from New York City, Wythe Windows is leading the way in energy-efficient building solutions with PHI-certified components, NFRC certification, and deep expertise in Passive House design and construction.Wythe Windows is also actively engaged with the Passive House Network, supporting the advancement of high-performance building standards and helping drive greater adoption of sustainable, energy-efficient construction practices across North America.From luxury residential builds to large-scale commercial developments, Wythe delivers performance-driven window and door systems engineered for sustainability, comfort, and long-term value.In this conversation, Darren shares insights on:• Why triple pane tilt-turn systems are gaining momentum• The importance of Passive House standards in modern construction• U.S.-based manufacturing advantages• Commercial and residential project applications• The future of high-performance building envelopeshttps://www.wythewindows.com/darrren@wythewindows.comLearn more:Commercial Construction Coffee Talk (CCCT) covers the design-build-maintain marketplace, including retail, hospitality, healthcare, mixed-use, multifamily, office, education, and more.

In this episode of the Talk Design podcast, host Adrian Ramsey sits down with Brian Johnson, a general contractor and the founder of Synergy 360. With a diverse background that spans commercial construction, Ironman triathlons, and the biohacking wellness industry, Brian bridges the gap between advanced building science and holistic health.Brian shares his journey of turning the home into a true healing modality. Guided by the philosophy of his mentor, renowned architect Paula Baker-Laporte, that "Nature is the gold standard," Brian discusses how we can mimic the natural environment indoors. He takes us down the "rabbit hole" of building biology, explaining the hidden health impacts of Electromagnetic Frequencies (EMFs) and how to mitigate them using hardwired infrastructures and low-voltage DC circadian lighting systems like Color Beam.Adrian and Brian also debate the nuances of the Passive House standard, agreeing that true sustainable design must be highly contextual to its climate—allowing a home to breathe and open up to nature when appropriate. Finally, Brian unveils his latest pioneering project: "The Element," an upcoming 20-home wellness community nestled in a canyon north of Tucson, Arizona. These homes will seamlessly blend timeless, Southwestern architectural aesthetics with cutting-edge health technology, including structured water pools and advanced air filtration.Key Topics Covered:The Birth of Synergy 360: How Brian's background in biohacking and commercial building led him to pioneer wellness-focused residential construction.Demystifying EMFs: An accessible breakdown of electromagnetic frequencies, how wireless tech and "dirty electricity" affect our biology, and practical ways to wire a home for a low-EMF sanctuary.Circadian Lighting & Indoor Air Quality: The science behind mimicking the sun's natural spectrum indoors to support our biological clocks, and the post-COVID evolution of residential air filtration.The Passive House Debate: Why creating a sealed "bubble" isn't always the best approach, and the importance of contextual, hybrid designs that allow for natural cross-flow ventilation."The Element" in Tucson: A sneak peek into Brian's upcoming 20-home community that merges indigenous Adobe-style architecture with the ultimate health and wellness amenities.The Emotional Floor Plan: Brian discusses his personal studio space—a bright, grounding environment fueled by natural daylight and Chinese elements that brings him "Joy" and flow. Hosted on Acast. See acast.com/privacy for more information.

In this episode of The Passive House Podcast, Mary James chats with Nidhi Shah, a certified Passive House designer and member of the Reimagine Buildings Collective. Shah traces her path from early sustainability interests in India to Passive House training in the UK. They dive into her retrofit-focused work with Retrofit Action for Tomorrow (RAFT), emphasizing whole-building approaches over piecemeal measures like external wall insulation or heat pumps. Nidhi  describes how funding criteria centered on operational carbon shaped retrofit decisions for cash-strapped public-sector buildings, and why reducing demand and peak heating loads matters alongside electrification and comfort. https://www.retrofitaction.org.uk/s/RAFT-Whole-Life-Carbon-ReportReimagine Buildings: Designing for Survivability: https://events.ringcentral.com/events/reimagine-buildings-survivability/registrationThank 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.

We take a look at the state of the green building sector through the lens of itss biggest dedicated show in the UK, Futurebuild. It on 12–14 May this year and you can sign up here.Helping us to peek behind the curtain is the event's director, Martin Hurn, a man who is, ultimately, responsible for it all.It seemed with a conversation because this year Futurebuild was acquired by a new owner and repackaged to become a super event. The green building great big networking event has merged with UK Construction Week and the Stone and Surfaces Show. In light of this we get into the history of Futurebuild that sheds a little light on how the impact of changes that it's going through right now are a little more like a return to its roots.The episode has a bit of a long wind up because we've included a chunk of preamble in which Jeff explains his background to Martin which wasn't intended for the episode but it ended up revealing similarities, and differences, in their backgrounds that felt worth including. Both Martin and Jeff have been in this working within the business of the built environment for about the same amount of time (early 00s), and both coming from publishing backgrounds. They've seen the heydays, boom times, and catastrophes created by the Celtic Tiger and the UK's solar subsidisation and feed-in tariffs. Consequently, the pair of them are able to offer a some illuminating and interesting perspectives on where they see the sector at this strange point in time.We also let Martin plug the show.And, at the end we do get around to asking ‘how sustainable are events?'Notes from the showRegister with Futurebuild 2026 for your event passThe Futurebuild website Martin Hurn on LinkedIn **SOME SELF-PROMOTING CALLS TO ACTION**We don't actually earn anything from this podcast, and it's quite a lot of work, so we have to promote the day jobs.Follow us on the Zero Ambitions LinkedIn page (we still don't have a proper website)Jeff and Dan about Zero Ambitions Partners (the consultancy) for help with positioning and communications strategy, customer/user research and engagement strategy, carbon calculations and EPDs – we're up to all sortsSubscribe and advertise with Passive House Plus (UK edition here too)Check Lloyd Alter's Substack: Carbon UpfrontJoin ACANJoin the AECB Join the IGBCCheck out Her Retrofit Space, the renovation and retrofit platform for women**END OF SELF-PROMOTING CALLS TO ACTION**   

In this episode we are talking about a greatly overlooked determinant of health — your home. We obsess over food, supplements, exercise, sleep… but what if the very walls around you are either supporting your biology — or silently stressing it? My guest today is Paul Kealey, founder and president of EkoBuilt and the architect of the “House is Medicine” system. For nearly two decades, he has been pioneering the design and construction of low-energy Passive House and Net-Zero homes that don't just save energy — they actively improve air quality, reduce mold risk, stabilize temperature, calm the nervous system, and support long-term health. We spend up to 90% of our lives indoors. Think about the impact on our health if the home we live in could reduce inflammation, improve sleep, and even prevent chronic illness? Learning Points: • Why your home is a biological environment • Mold & poor air quality are design failures — not just bad luck • Passive & Net-Zero homes are about health — not just energy savings Social Media: https://ekobuilt.com/ https://www.linkedin.com/in/paul-kealey-17614529/

In this episode of The Passive House Podcast, Matthew Cutler-Welsh speaks with Andreas Goetz about building the Wunderbar Passive House in Orewa, about 40 minutes north of Auckland. Originally from Germany and motivated by comfort and health, Goetz pursued Passive House despite local challenges, choosing a simple rectangular ICF design with imported European triple-glazed windows and integrated exterior shutters to manage overheating without mechanical cooling. The home uses whole-house ventilation, achieved near 0.6 ACH50 airtightness, has low power bills, and added solar projected to pay back in four years, while also earning Homestar V5.https://wunderbar-passive-house.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, Ilka Cassidy and Jacob Racusin are at the BuildingEnergy Boston 2026 Conference (Sponsored by New Energy Works).Ilka and Jacob recap day 2 of the conference including a keynote by Melissa O'Mara and Kevin Stack, “Unstoppable Inner Resilience and Generational Leadership,” which guided attendees through a meditation connecting to ancestors and future generations, highlighting accountability, leadership, and the “knowing-doing gap” via the Inner Development Goals. Ilka then interviews architect Phil Kaplan about a deep energy retrofit of a mid-century Acorn Deck House involving unexpected conditions, major structural changes, and questions about cost and embodied carbon versus rebuilding. The day's highlights also include sessions on tools and strategies to balance operational and embodied carbon, evaluate deep versus moderate retrofits, and push manufacturers toward healthier, lower-impact materials.Episode with Rachel White & Michael Hindle: https://passivehouseaccelerator.com/podcast/building-energy-boston-with-rachel-white-michael-hindleMeditation that is similar to the one described in the episode: https://podcasts.apple.com/us/podcast/the-long-time-academy/id1589516917Episode with Melissa O'Mara and Kevin Stack: https://passivehouseaccelerator.com/podcast/180-inner-development-goals-idgs-and-buildings-with-kevin-stack-and-melissa-omara 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.

What is social value? It's a messy, ill-defined beast that's increasingly a core component of public procurement, and it's something that we worked on recently so it's been front of our minds.We invited Michael McLaughlin (LHC Procurement Group) onto the show to talk through what he thinks about social value, and what he thinks it could be if the sector was able to organise itself better. No shade intended and we're not suggesting that it's easy to fix things, but we have looked into it. While there's a lot of great work being done there are an unconscionable number of opportunities being wasted, and not for want of trying.Notes from the showMichael McLaughlin on LinkedInThe LHC Procurement Group website LHC on LinkedIn **SOME SELF-PROMOTING CALLS TO ACTION**We don't actually earn anything from this podcast, and it's quite a lot of work, so we have to promote the day jobs.Follow us on the Zero Ambitions LinkedIn page (we still don't have a proper website)Jeff and Dan about Zero Ambitions Partners (the consultancy) for help with positioning and communications strategy, customer/user research and engagement strategy, carbon calculations and EPDs – we're up to all sortsSubscribe and advertise with Passive House Plus (UK edition here too)Check Lloyd Alter's Substack: Carbon UpfrontJoin ACANJoin the AECB Join the IGBCCheck out Her Retrofit Space, the renovation and retrofit platform for women**END OF SELF-PROMOTING CALLS TO ACTION**

https://youtu.be/HicyIaKqRgkMatt talks with Two Bit Da Vinci and Ziroth about Donut Lab's new battery, the controversy around it, and what they think it actually might be.Watch the Undecided with Matt Ferrell episode, The Breakthroughs My Net Zero Home is Missing https://youtu.be/hb2x5VcUT0I?list=PLnTSM-ORSgi7FwYRnWkpCSkAeFOzrgh5h(00:00) - - Intro (01:46) - - Donut Lab Conversation (01:01:40) - - Home Regrets Discussion YouTube version of the podcast: https://www.youtube.com/stilltbdpodcastGet in touch: https://undecidedmf.com/podcast-feedbackSupport the show: https://pod.fan/still-to-be-determinedFollow us on X: @stilltbdfm @byseanferrell @mattferrell or @undecidedmfUndecided with Matt Ferrell: https://www.youtube.com/undecidedmf ★ Support this podcast ★

In this episode of The Passive House Podcast, Ilka Cassidy and Jacob Racusin are at the BuildingEnergy Boston 2026 Conference (Sponsored by New Energy Works).Ilka and Jacob speak with:Gregory Smith, Architect at Moody NolanClay Tilton, Existing Buildings Program ManagerBuilt Environment Plus (BE+)Arlen Li, Fitwel Ambassador, Planning PrincipalHGAAnthony Michetti, Director of Sustainability, Cell Signaling TechnologyJulie Newman, PhDDirector of SustainabilityMassachusetts Institute of Technology (MIT)Steve Hessler Building Systems Specialist at New Energy Works | Certified Passive House Consultant at Holzraum SystemBryan Bleiere, Director of Offsite Construction at New Energy WorksLuke Winston-Almanzar CEO, Co-Founder ReservoirThey discuss the conference mood amid political and economic headwinds, the theme “Don't Stop Us Now,” and a keynote on “The Cost of Pausing” featuring MIT and Cell Signaling Technology, emphasizing business cases and co-benefits for maintaining climate goals. Conference co-chairs Clay Hilton and Greg Smith highlight curation, community-building, and student participation. Trade-floor interviews feature Reservoir's smart heat-pump water heater with predictive controls and recirculation, and New Energy Works' timber/panelization work and foam-free assemblies.https://nesea.org/conference/schedule/50140https://newenergyworks.com/https://passivehouseaccelerator.com/articles/component-spotlight-rethinking-domestic-hot-water-intro...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.

Just because someone lives in an apartment doesn't mean they don't want to go outside and be in nature.In this episode, I sit down with Lauren Zullo, Managing Director of Impact at Jonathan Rose Companies, at their Midtown Manhattan headquarters to talk about what happens when you design affordable housing around health — and how nature fits into that equation. Lauren's work sits at the intersection of housing, sustainability, and the social determinants of health, and she makes the case that housing touches every single one of them: air quality, food access, social connection, financial stress, and the immediate environment in which people live.We talk about how Jonathan Rose Companies brings nature into 19,000 units of affordable housing across the US — from trees for shade in the Bronx to green roofs that make rooftop solar more efficient in DC — and why the business case for green space isn't about ecosystem services but about building places people actually want to stay. Lauren also shares the story behind Sendero Verde in East Harlem, one of the largest affordable Passive House buildings in the world, where the courtyard follows a Lenape walking trail and the plantings were chosen based on the indigenous species that once grew on the site.Find Lauren Zullo and Jonathan Rose Companies at rosecompanies.com.

Building science is at the core of high-performance construction, but it takes more than an understanding of psi-values and hygrothermal dynamics to actually get these buildings built. As we see in this episode, having a real-world understanding of materials science, finance, and how people actually work together is yet another component to this line of work. Granted, there's still a lot of building science involved, as emphasized by the clips featuring Ed May and Ben Bogie, but this episode of The Reimagine Edit series of the Passive House Podcast should be a reminder that construction touches loads of academic fields, and that the status of expert will forever be a moving target in an evolving industry.In this episode, host Zack Semke shares selected clips of conversations from the Reimagine Collective. Featured speakers include Ben Bogie, Jesse Hunt, Michael Ingui, Ed May, and Emily Mottram.The Reimagine Edit is a special series of the Passive House Podcast that shares curated insights from our Experts-In-Residence at the Reimagine Buildings Collective, our membership community of building professionals stepping up to tackle climate change. Learn more about the Reimagine Buildings Collective at https://www.reimaginebuildings.com.

Lucy Lyons of Kestrix joins us this week to talk about their use of drones, infrared imaging, and AI to quicken the pace of retrofit surveying. Specifically, with regard to a case study detailing their work with Peabody housing association.Kestrix is a software company that works with landlords to assess their building stock in terms of which homes need help and whether the retrofit works that have been carried out are performing. They use their sophisticated broad-brush surveys and image analysis is is designed to help asset owners get the greatest value out of stretched budgets and capacity, investing time wisely and proving value for money.Notes from the showLucy Lyons on LinkedInKestrix on LinkedIn The Kestrix website The Kestrix & Peabody case study that we refer toNational Audit Office report of retrofit performance: Energy efficiency installations under ECONHMF award 'Best Warm Home Initiative' 2026New Study Suggests Using AI Made Doctors Less Skilled at Spotting Cancer**SOME SELF-PROMOTING CALLS TO ACTION**We don't actually earn anything from this podcast, and it's quite a lot of work, so we have to promote the day jobs.Follow us on the Zero Ambitions LinkedIn page (we still don't have a proper website)Jeff and Dan about Zero Ambitions Partners (the consultancy) for help with positioning and communications strategy, customer/user research and engagement strategy, carbon calculations and EPDs – we're up to all sortsSubscribe and advertise with Passive House Plus (UK edition here too)Check Lloyd Alter's Substack: Carbon UpfrontJoin ACANJoin the AECB Join the IGBCCheck out Her Retrofit Space, the renovation and retrofit platform for women**END OF SELF-PROMOTING CALLS TO ACTION**

In this episode of The Passive House Podcast, Zack Semke chats with Nick Nigro of Leggat McCall about the Bunker Hill Housing Redevelopment in Charlestown, Boston, a phased replacement of 42 aging WWII-era public housing buildings into 2,699 mixed-income units. Nick explains how the team committed to Passive House from day one and is using a repeatable “kit of parts”—precast lateral-load-bearing cores, prefabricated load-bearing exterior panels, and CLT floor systems—to improve speed, reduce temporary work, and lower both carbon and cost through iteration across 15 buildings. He describes early modeling, enclosure mockup testing, and construction-sequencing innovations like using the permanent elevator as a hoist. https://passivehouseaccelerator.com/articles/critical-mass-scaling-passive-house-at-bunker-hillhttps://www.lmp.com/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 chats with Kia Weatherspoon, founder of Determined by Design. Weatherspoon describes how experiences visiting her brother in prison and creating privacy during Air Force deployments shaped her belief that spaces must be felt, not just seen. She explains her mission-driven focus on affordable housing and a design process rooted in ancestry, legacy, and identity, translating community narratives into specific material and layout decisions. The discussion emphasizes bringing interiors into the integrated design team early, pushing for healthier materials amid cost and pricing-transparency challenges, and streamlining specifications to maintain budgets. The hosts reflect on how interior environments affect wellbeing and project outcomes.https://www.determinedbydesign.com/portfolio/station-u-o/https://passivehouseaccelerator.com/articles/leading-with-humanity-passive-interior-design

Baz Iyer (Vulcan) and Stephen Lloyd (Savills Earth) join us to talk about the likely impact of the UK's long-awaited Future Homes Standard (FHS) and, perhaps more importantly, the Home Energy Model (HEM).HEM is the new model that will inform the UK's Energy Performance Certification (EPC) rating system. It's much more detailed in terms of the information that it demands about the buildings it is being used to rate, and therefore much more demanding of the assessors.But this means that it can be much more useful for modelling the energy performance of buildings because it will better reflect how the building will be experienced by its users.  It won't be perfect but the level of detail that it demands means that homeowners may be able to use EPCs to make meaningful decisions about how to improve the buildings in which they live. This also means that, in time, it is conceivable that HEM can become a design tool in the same way designers use PHPP to predict performance and calibrate design. That's certainly what Baz is planning and why he and Stephen have been interrogating the place HEM will occupy in the UK construction sector, the impact it might have on its culture, and the opportunity that its adoption will open up.If anyone needs some help getting to grips with this I'd recommend they connect with Baz, he's very friendly and well-informed.Notes from the showBaz Iyer on LinkedInStephen Lloyd on LinkedIn The Vulcan websiteThe Savills Earth websiteVulcan on LinkedInOld ZAP #1 - 'Incompetence still reigns supreme' in energy ratings: DPE certification, EPCs, BERs, and a little bit of ESGOld ZAP #2 - ZAP Shady business #1 – overheating, and Camden: we should think about solar gain all year round, with Zoe De Grussa (BBSA)**SOME SELF-PROMOTING CALLS TO ACTION**We don't actually earn anything from this podcast, and it's quite a lot of work, so we have to promote the day jobs.Follow us on the Zero Ambitions LinkedIn page (we still don't have a proper website)Jeff and Dan about Zero Ambitions Partners (the consultancy) for help with positioning and communications strategy, customer/user research and engagement strategy, carbon calculations and EPDs – we're up to all sortsSubscribe and advertise with Passive House Plus (UK edition here too)Check Lloyd Alter's Substack: Carbon UpfrontJoin ACANJoin the AECB Join the IGBCCheck out Her Retrofit Space, the renovation and retrofit platform for women**END OF SELF-PROMOTING CALLS TO ACTION**

In this episode of The Passive House Podcast, host Matthew Cutler interviews New Zealand building scientist and sustainability specialist Tavis Creswell-Wells of Ecolution about overheating risk, building performance, and lessons from working in the UK. Tavis describes his path from architecture to building science, early research with BRANZ on the Building Energy End Use Study, and later experience in London with large energy modeling and rating systems including BREEAM, WELL, and Part L. He argues New Zealand's H1 code overemphasizes insulation and lacks requirements to address overheating, while Part L includes lighting, hot water, mechanical systems, and checks at design and completion. The conversation covers glazing, shading, natural ventilation limitations, PHPP overheating constraints, and using TM59 for zoned overheating analysis, and previews the Reimagine Buildings Multifamily online conference.https://ecolutionsbs.com/ecolutionThank 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, Jay Fox speaks with Tony Daniels and Caitlin Matusewicz of Cycle Architecture + Planning about their backgrounds in high-performance design and the firm's focus on scalable multifamily deep energy retrofits, resilience, and Passive House. The conversation covers why retrofits are harder than new construction and how Cycle aims to scale by starting with repeatable retrofit solutions. They discuss panelized overcladding and modular mechanical strategies, NYSERDA's role via incentives and innovation programs, and broader barriers such as contracting and insurance models that enforce siloing.https://www.c-ap.net/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.

We sat down with Anna Moore, CEO of Domna Group, to talk about its approach to the business of retrofit, pragmatic retrofit strategy, and long-term asset management for landlords. All underpinned by a layer of data collation and machine learning.Domna is currently retrofitting around 10,000 homes per year through grant-funded and self-funded programmes, using an integrated asset management—strategy to: deliver impact and savings through a mix of strategy, support on funding, management of delivery, and quality assurance. Importantly, Anna knows her stuff and she is fun, too.Notes from the showAnna Moore on LinkedInDomna Group on LinkedIn The Domna website (sign up in the footer)**SOME SELF-PROMOTING CALLS TO ACTION**We don't actually earn anything from this podcast, and it's quite a lot of work, so we have to promote the day jobs.Follow us on the Zero Ambitions LinkedIn page (we still don't have a proper website)Jeff and Dan about Zero Ambitions Partners (the consultancy) for help with positioning and communications strategy, customer/user research and engagement strategy, carbon calculations and EPDs – we're up to all sortsSubscribe and advertise with Passive House Plus (UK edition here too)Check Lloyd Alter's Substack: Carbon UpfrontJoin ACANJoin the AECB Join the IGBCCheck out Her Retrofit Space, the renovation and retrofit platform for women**END OF SELF-PROMOTING CALLS TO ACTION**

Architecture education is often romanticized as a pursuit of pure creativity, but in reality, it serves as a masterclass in grit. The studio environment, characterized by sleepless nights and public critiques, builds a specific kind of resilience necessary for navigating a risk-averse industry. While sectors like lighting have undergone rapid technological revolutions—moving from incandescent to LED in a decade—commercial construction moves at the speed of a massive vessel, slowed by liability concerns and ingrained methods. Designer Resources Pacific Sales Kitchen and Home. Where excellence meets expertise. TimberTech – Real wood beauty without the upkeep This hesitation, however, is slowly giving way to data-driven sustainability. The industry has shifted from making purely economic arguments for energy efficiency to focusing on human health and wellness, a transition accelerated by the pandemic. Tools like the Healthy Materials Database now allow teams to bypass greenwashing, using empirical data to guide tradespeople who might otherwise resist new specifications. By framing material changes as collaborative problem-solving rather than top-down mandates, the industry can bridge the gap between high-concept design and practical application. Nowhere is this practical application more evident than in the “Net Zero Trailer” project. Born from a desire to improve job site dignity and efficiency, this ten-week experiment successfully merged Passive House standards with trailer manufacturing. It proved that construction environments do not have to be uncomfortable energy hogs; they can be solar-powered hubs of productivity. This experiment serves as a microcosm for the industry's broader challenge: how to scale innovation. Whether adapting to the massive energy demands of data centers or designing schools with a 100-year operational lifespan, the future of building requires looking beyond current codes. It demands a “green shoots” mentality where structures are designed not just for immediate occupancy, but for climate resilience and flexibility across generations. The Hedgehog Concept: A framework from the book Good to Great focusing on the intersection of passion, talent, and economic engines. Good to Great by Jim Collins USGBC & Healthy Materials: Susan discusses her work with the U.S. Green Building Council and managing a database of over 2,500 sustainable building products. U.S. Green Building Council (USGBC) Living Building Challenge The Net Zero Trailer: Pepper Construction's experiment to create a solar-powered, Passive House-standard job site trailer in under 10 weeks. Pepper Construction Passive House Institute Trade Education & AGC: How general contractors are collaborating to educate tradespeople on green building methods and carbon tracking. Associated General Contractors of America (AGC) Climate Risk & 100-Year Buildings: The shift toward designing K-12 schools and community structures to withstand climate changes and serve communities for a century or more. Thanks for listening to Convo By Design, 13 years, over 700 episodes and 3 million downloads and listens to the show!

In this episode of The Passive House Podcast Jay Fox interviews Edie Dillman (co-founder and CEO of B.Public Prefab) and Karen Ramsey (founder and sustainability strategist at Building Wellness) about Fort Collins, Colorado's Design to 2030 pilot program. They describe B.Public's panelized, Passive House–standard prefab shell system launched in 2019 and Ramsey's consulting work supporting Passive House projects, including rebuild efforts after the Marshall Fire and work tied to the Los Angeles fire rebuild. The conversation centers on Fort Collins' plan to provide affordable, permit-ready, high-performance home plan sets tailored to local climate and code, with community outreach to determine needed housing types and builder training on panelization and key Passive House techniques.Sears Homes: https://en.wikipedia.org/wiki/Sears_Modern_Homeshttps://www.bpublicprefab.com/https://www.buildingwellnessllc.com/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, co-host Jay Fox interviews Heather McKinstry and Shefali Sanghvi of Dattner Architects about their work focusing on Passive House projects, primarily affordable housing in New York City. The discussion delves into Dattner Architects' commitment to civic work, including multifamily housing, transportation, and healthcare projects. They emphasize the benefits of Passive House standards in dense urban environments, particularly in improving indoor air quality and reducing energy consumption. The conversation also touches on overcoming misconceptions about costs, the importance of third-party certification, and the educational needs of both clients and residents. The episode concludes with recommendations for developers interested in pursuing affordable Passive House projects, including tapping into state and local resources and ensuring expertise within the project team.https://www.dattner.com/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.

We're back! And we're talking about the value of post-occupancy evaluation (POE) with Tom Robins and Leigh Fairbrother of Switchee.Their business is POE for landlords that's intended to improve the quality of life for the residents that they rely on. Capturing sensor data, analysing it, and synthesising that into something their clients can use.Essentially, this means validating the quality of fabric, the impact of retrofit works, and anticipating car crashes—metaphorical ones.We get a really helpful explanation of Awaab's Law around 25–30 minutes in, too. (Thank you Leigh.)Notes from the showTom Robins on LinkedInLeigh Fairbrother on LinkedIn The Switchee website (sign up in the footer)Switchee on LinkedInPH+ coverage of that early work in Thamesmead (the Clockwork Orange estate) **SOME SELF-PROMOTING CALLS TO ACTION**We don't actually earn anything from this podcast, and it's quite a lot of work, so we have to promote the day jobs.Follow us on the Zero Ambitions LinkedIn page (we still don't have a proper website)Jeff and Dan about Zero Ambitions Partners (the consultancy) for help with positioning and communications strategy, customer/user research and engagement strategy, carbon calculations and EPDs – we're up to all sortsSubscribe and advertise with Passive House Plus (UK edition here too)Check Lloyd Alter's Substack: Carbon UpfrontJoin ACANJoin the AECB Join the IGBCCheck out Her Retrofit Space, the renovation and retrofit platform for women**END OF SELF-PROMOTING CALLS TO ACTION**

In this episode of The Passive House Podcast, host Zack Semke discusses bio-based materials and high-performance buildings with Lindsey Love from Regenerative Building Solutions. They highlight the importance of early phase energy and embodied carbon modeling, integrating natural materials in construction, and the benefits of such materials for building resilience and occupant health. They also discuss the AIA 2030 Commitment and the Materials Pledge, emphasizing strategies for small firms to implement high-impact, sustainable building practices. Regenerative Building Solutions: https://www.regenbuilding.com/Link to the AIA 2030 Commitment: https://www.aia.org/design-excellence/climate-action/zero-carbon/2030-commitmentNature-based Performance Lab's Fall insight brief: https://passivehouseaccelerator.com/articles/retrofit-labs-insight-briefs-now-availableThank 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.

There's a lot of building science that goes into making passive buildings extremely durable, efficient, comfortable, and healthy. However, one of the things that often gets overlooked when trying to explain the benefits of Passive House is the experience of actually being in one. There is a certain ineffability associated with the experience that defies easy translation into facts and figures, and this can be especially tricky to communicate to clients who are not already enthusiastic about Passive House. However, as revealed throughout episode fourteen of The Reimagine Edit series of the Passive House Podcast, finding ways to frame Passive House as being quieter, healthier, more comfortable, more resilient, and just…better is key to getting them on board.In this episode, host Zack Semke shares selected clips of conversations from the Reimagine Collective. Featured speakers include Craig Stevenson, Lindsay Schack, Matt Brill, Graham Irwin, and Michael Ingui.The Reimagine Edit is a special series of the Passive House Podcast that shares curated insights from our Experts-In-Residence at the Reimagine Buildings Collective, our membership community of building professionals stepping up to tackle climate change. Learn more about the Reimagine Buildings Collective at https://www.reimaginebuildings.com.

“First we shape our buildings, thereafter they shape us.” - Winston Churchill (attributed)The natural world is humanity's original habitat. This habitat supports our physiological energy efficiency and is an important health intervention for the AEC industry. These are core perspectives that Helena van Vliet shares in this joint PHA-Building Science Podcast interview. Helena makes the clear case that we are “open systems” - we take in our environments, both physically and with our perceptions. Whether outdoors or indoors, our physical selves have their own experience of each environment we inhabit. This experience first informs our bodies, which have their own reactions of ease or dis-ease; and next, seemingly at the same time, this experience then informs our minds and our psychological reality comes to life. This interview is yet another beacon guiding us to deeply rethink how we deliver indoor spaces to ourselves. Enjoy the nourishing feast of ideas here!Helena van VlietHelena 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. Helenais the Principal at Helena van Vliet LLC, as well as a founding member of BioPhilly. Since 2013, she has served as a Steering Committee Member for the International Biophilic Cities Network.Since 2018, Helena has taught her interdisciplinary seminar “Environments for Well-Being” at Thomas Jefferson University, bringing together design and health science students to explore the building blocks - and underlying science - of spaces that support well-being. She is a frequent lecturer at the University of Pennsylvania, Drexel, Widener, the Bauhaus University Weimar, Germany, and the Politecnico di Milano, Italy.Ilka CassidyIlka Cassidy, Dipl.-Ing. Architecture, CPHC, is the co-founder of C2 Architecture and Holzraum System, with a deep passion for Passive House envelope design and building science. She focuses on the benefits of using natural building materials and specializes in offsite construction.With extensive experience in Passive House consulting and energy modeling, Ilka has a strong understanding of energy efficiency strategies. As a co-founder of C2 Architecture, she brought a sustainable design perspective to the firm from its inception. Through Holzraum System, she has worked to merge the precision and scalability of prefabrication with the use of healthy, low-carbon materials, all while optimizing energy efficiency with Passive House principles.Ilka is also committed to expanding knowledge in the industry, serving as co-host of the Passive House Accelerator Podcast and Construction Tech Live events. She is a frequent conference speaker and an active member of Green Building United in Philadelphia. She is a proud mom for her three girls and a visiting educator and McGill University. TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

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 Power of Design Podcast, Kristina Held shares how her multicultural education across Belgrade, Germany and the United States shaped her foundation in technical design and construction. She reflects on her commitment to sustainable architecture, her preference for Passive House over LEED and her unique ability to bridge art and engineering. Listen to discover how structure, intention and innovation can elevate every design decision. Kristina Held Linkedin Held Architecturet Episode Page Podcast Page Ossa Studio Instagram Jack Ossa Instagram Spotify Apple Podcast Amazon Music YouTube

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=2026-01-14James 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.

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 efforts. Maggie emphasizes the importance of building coalitions, understanding local government roles, and adaptable strategies for sustainability. She also discusses the challenges and successes in disaster recovery, highlighting the community's unity and advocacy at the federal level.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 today's episode of the Build Show Podcast, Matt sits down with builder and colleague Daniel Glauser to dive into the wins and the “oh dangs” from their recent personal home builds. From airtightness strategies and Huber ZIP System successes to HVAC lessons, dehumidification, window packages, design constraints, and why smaller, smarter homes often lead to higher quality—Matt and Daniel get candid about what worked, what they'd change, and what every builder or homeowner should learn before beginning a project.They also explore the realities of renovating versus starting fresh, how Passive House principles shaped Daniel's 1977 retrofit, and why intentional square footage can make or break a budget. Whether you're a builder, a homeowner planning a project, or a building science nerd, this episode is packed with firsthand insights that will help you design and build better. Huge thanks to our episode sponsor, Huber. Learn more at: https://www.huberwood.com  Watch full episodes of Matt on Facebook, Instagram and Build Show Network. https://www.facebook.com/buildshownetworkhttps://www.instagram.com/risingerbuild/https://buildshownetwork.com/go/mattrisinger Don't miss a single episode of Build Show content. Sign up for our newsletter.