The Flow Lab

Ben Walker and Sam Myers sit down with Jake Bruton to talk blower door testing, airtightness, and why data beats opinions every time. Jake explains why he tests multiple times during a build, what leak paths still surprise teams, and how those checks reduce risk and callbacks. They also get into vetting HVAC contractors for low load homes and why buy-in matters more than bravado. If you are serious about building better, share this with a builder who still “just knows” it’s tight.Show Notes:00:00 Data Over Opinions00:59 Three Test Strategy03:09 When To Test05:07 Hidden Leakage Spots06:19 The 30% Drop08:57 Solving The Lid19:16 Vetting HVAC Subs25:21 Advice For Builders31:31 Tight Means Tested38:59 Where To Learn49:41 Buy The BlowerConnect with: Jake BrutonWebsite: www.aarowbuilding.comInstagram: https://www.instagram.com/jake.brutonFollow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

Ben Walker and Sam Myers sit down with Xavier Walter of the Building Performance Association to talk about the workforce gap, why HVAC contractors need building science partners, and where the industry is headed next. They get into apprenticeship and workforce development, how weatherization and HVAC can work together, and why callbacks drop when contractors solve the whole problem. Plus, a quick run-through of what to expect at the BPA National Conference in Columbus, April 13–16.  And if you want to attend, use this link to register: http://nhpc26.org/flow-labUse code NHPC-Flow for a discounted registration rate ($825)Video Notes: 00:00 Show Intro01:03 Xavier’s Path In03:52 BPA Resources05:07 Workforce Challenges09:23 HVAC And Weatherization13:20 Building Science Basics18:43 Why Attend BPA21:08 Beyond Residential Work24:00 Conference Game Plan28:36 Free Market Shift33:48 Questions Homeowners Ask35:35 Pass It ForwardConnect with: Xavier Walterhttps://www.linkedin.com/in/xavier-walter-1164812b/Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

Sam Myers and Ben Walker sit down with Joe Medosch to talk about why indoor air quality is personal, and why better HVAC diagnostics matter more than ever. They break down MeasureQuick, direct capture, and the accountability gap that still holds the industry back. You will also hear why “the occupant is the greatest sensor,” plus what wildfire smoke and ventilation mean for real homes. If this helped, share it with a tech or builder who cares about getting it right.Show Notes: Introduction and Welcome (0:00)Retro Tech and Joe's Contributions (1:26)Challenges in the HVAC Industry (2:43)Health and Air Quality Focus (4:51)Measure Quick and HVAC Diagnostics (5:51)Training and Education in HVAC (17:50)Occupant-Centric Approach to Building Performance (18:03)Wildfire Smoke and Indoor Air Quality (19:56)Future of HVAC and Measure Quick (41:18)Closing Remarks and Future Collaboration (47:15)Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

Most “Indoor Air Quality upgrades” are just gadgets in a box. And a lot of them can make things worse. HVAC and building science veteran John Ellis joins Sam Myers and Ben Walker to break down what actually moves the needle in a home: thermal comfort, ventilation, filtration, humidity control, building pressure, and source control. If you build, renovate, or work on HVAC, this episode will change how you think about “clean air” and what it takes to actually deliver it.Video Notes: Indoor Air Quality and Environmental Changes (0:00)Ventilation and Indoor Air Quality Measurements (1:43)Dust Free 16 Filter Development (5:59)Filter Media and Performance (10:07)Distribution and Market Reception (14:16)Indoor Air Quality and Building Science (15:59)Challenges in the HVAC Industry (26:24)Data-Driven Solutions and Training (39:51)Menu Pricing System for IAQ Services (42:04)Future Developments and Final Thoughts (44:18)Connect with : John EllisLinkedIn: https://www.linkedin.com/in/john-ellis-b13b0411/ Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

Everyone blames the HVAC System. Most of the time, that’s wrong. Nikki Krueger breaks down why modern homes struggle with humidity, even with high-efficiency systems, and why dehumidification has become a missing piece in comfort, health, and durability.Sam, Ben and Nikki talk crawl spaces, shoulder seasons, overcooling, air leakage, ventilation mistakes, and the real-world install details contractors keep getting wrong.If you work on houses, or live in one ... this conversation will change how you think about moisture control.Video Notes: Placement and Ducting of Dehumidifiers (2:31)Air Distribution and Heat Generation (6:08)Retrofitting and Challenges in Existing Homes (8:51)Humidity Control and Building Codes (12:20)Ventilation Strategies and Industry Advancements (29:07)Contractor Mistakes and Best Practices (38:56)Industry Collaboration and Future Directions (48:11)Final Thoughts and Future Opportunities (49:52)Connect with : Nikki KrugerWebsite: www.-Santa-Fe-Products.comLinkedIn: https://www.linkedin.com/in/nikkikrueger/ Instagram: https://www.instagram.com/nikkikrueger_iaq/ Facebook: https://www.facebook.com/nikki.krueger.71Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

High school students are building real, high-performance homes… and hitting 0.9 ACH50. Matt Blomquist joins The Flow Lab to unpack how his class builds tighter houses than most pros, why blower-door testing is a game-changer, and how hands-on education is shaping the next generation of builders.If you care about building science, air sealing, or the future of the trades, this episode hits hard.Matt Blomquist's Journey into Teaching and House Building (0:00)Starting the House Building Program (3:16)Student Involvement and Class Structure (4:31)Challenges and Achievements in House Building (42:20)High Performance Building Science (42:38)Impact and Future of the Program (42:54)Video Notes: Matt Blomquist's Journey into Teaching and House Building (0:00)Starting the House Building Program (3:16)Student Involvement and Class Structure (4:31)Challenges and Achievements in House Building (42:20)High Performance Building Science (42:38)Impact and Future of the Program (42:54)Connect with : Matt Blomquist Instagram: https://www.instagram.com/build_learn_teach/ TikTok: https://www.tiktok.com/@build_learn_teach LinkedIn: https://www.linkedin.com/in/mattblomquist/ Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

On this episode of Flow Lab, Ben Walker and Sam Myers sit down with Leilani Orr and Ty Branaman from the Grit Foundation to talk about a very practical way to grow the trades pipeline: youth camps where kids actually do the work.Instead of PowerPoints and lectures, these camps drop 12–17-year-olds into escape-room-style challenges with real tools, real wiring, and real jobsite scenarios. Mentors don’t just “show and tell," they use a Socratic, question-first approach so kids learn to think, measure, troubleshoot, and fix things for themselves.You’ll hear how the camps are structured, what it realistically takes to host one, and why mentors come away just as energized as the students. From high-school interns in Retrotec’s engineering department to kids proudly taking home their own wired “wall boxes,” this episode is a how-to guide for turning “we need more people in the trades” into real action in your own community.In this episode, we get into:- How the Grit Foundation youth camps introduce 12–17-year-olds to the trades using real tools, real circuits, and jobsite-style scenarios- Why curiosity, questions, and mistakes are built into their Socratic teaching approach- The mentor’s role, the 1:2 mentor-to-student ratio, and how a detailed playbook keeps camp days on track- What it actually takes to host a camp: facilities, background checks, safety, and community partners- How these camps help kids connect the dots between fix-it life skills and real career paths- Why building science and HVAC are directly tied to public health and safety, not just comfort- How programs like this can help your local market build its own long-term talent pipelineIf you’ve ever said, “We need more people who actually understand how buildings work,” this episode shows one concrete way to start building that future, right where you live.Video Notes: 00:00 – Welcome to Flow Lab & Why the Trades Shortage Matters01:21 – Meet Grit Foundation & How the Youth Camps Started04:50 – Escape-Room Style Camps That Make the Trades Fun09:15 – Willis Carrier, Curiosity & the Socratic Teaching Model13:28 – Training Mentors & Walking Through a Camp Day17:36 – Real Impact on Students, Mentors & Retrotec Interns27:47 – What It Takes to Host a Grit Foundation Camp39:32 – Defining Success & Building Local Talent Pipelines45:00 – Bringing Curiosity Home & Connecting Trades to HealthConnect with : The Grit Foundation Website: www.thegritfoundation.comGrit Foundation Facebook: https://www.facebook.com/profile.php?id=61572576687441Grit Foundation Instagram: https://www.instagram.com/gritfoundation25Grit Foundation LinkedIn: https://www.linkedin.com/company/the-grit-foundation/?viewAsMember=trueFollow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

Solar & heat pumps can be a dream team or a challenge when time‑of‑use rates and sloppy sizing collide. Brent Davidson joins Ben Walker and Sam Myers to share a contractor‑first playbook: fix the enclosure, model the real load, then pair PV, storage, and controls so bills go down and stay down. We discuss home battery technology, how TOU windows change design decisions, and why rules of thumb (500‑sq‑ft‑per‑ton) still wreck outcomes. Brent also previews the US Heat Pump Summit happening in November 2025. This event is built to connect technical training with business systems so good work actually scales.Show Notes: 00:00 When solar + heat pumps backfire00:42 Welcome + guest intro: Brent Davidson00:56 US Heat Pump Summit in Worcester02:06 From utility-scale solar to home performance tools17:12 Home batteries are coming fast19:15 Time-of-use rates and the real load profile21:04 Order of operations and cross-trade coordination33:41 Sizing reality and Manual J pitfalls (with better tools)40:21 Inverters, downtime, and designing for resilienceConnect with Brent Davidson: Personal LI Profile: https://www.linkedin.com/in/brentdavidson/Company LI Page: https://www.linkedin.com/company/us-heat-pump-summit/Website: https://www.usheatpumpsummit.com/Facebook: https://www.facebook.com/profile.php?id=61577100464455Instagram: https://www.instagram.com/usheatpumpsummit/Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen on:Spotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovementFollow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system. Download our FREE ebook and start solving problems like a pro. 👉 https://bit.ly/flow-lab-ebook--------------------------------In this episode of The Flow Lab Podcast, hosts Ben Walker and Sam Myers are joined by John Konstantakopoulos and Joseph Cheung to discuss the challenges of improving airtightness and energy efficiency in Australian homes. The conversation explores the nuances of building construction in Australia, where airtightness and ventilation systems are not always prioritized, leading to major inefficiencies.John and Joseph share their insights on how to solve common issues in Australian building practices, especially regarding the impact of air leaks on energy waste, comfort, and health. They explain the importance of a whole-building approach to airtightness and ventilation, and how residential buildings could benefit from more awareness and implementation of airtightness testing.What You’ll LearnThe impact of air leaks on building performance and energy efficiencyThe role of ventilation in maintaining a healthy indoor environmentHow Australian homes compare to US and UK homes in terms of airtightnessThe challenges faced by Australian builders and how to address themWhy continuous ventilation is key for airtight buildingsStrategies for improving airtightness and reducing energy waste in various climatesEpisode Breakdown with Timestamps[00:00] - Introduction [05:50] - How did Efficiency Matrix start[08:38] - Green Building Council, Australia[14:48] - Common causes of leakage rates and how to solve them [16:27] - New Products on Efficiency Matrix[19:06] - Efficiency Matrix isn’t just for testing[25:43] - Design considerations for the open area and vent[28:43] - Envelope Integrity Report[33:43] - Logging issues after blower test[36:44] - Closing thoughts: EIR website and SubscriptionConnect with John KLinkedIn: https://www.linkedin.com/in/johnkonstan/?originalSubdomain=auCompany Website: htFollow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system. Download our FREE ebook and start solving problems like a pro. 👉 https://bit.ly/flow-lab-ebook--------------------------------In this episode of The Flow Lab Podcast, hosts Ben Walker and Sam Myers sit down with Sean Maxwell, Scheme Manager at ATTMA Australia & New Zealand, to discuss airtightness in buildings and the challenges of improving energy efficiency. From working with builders on airtightness practices to improve building codes, Sean shares his insights into the evolution of building science and the potential for large-scale improvements in comfort and energy use.Sean walks us through his journey in building science, including his time with the Energy Star Homes program and his efforts in advancing airtightness testing in Australia. He highlights the importance of both individual apartment and whole-building tests, discusses the role of ventilation systems in airtight buildings, and shares his thoughts on the future of energy efficiency standards.What You’ll Learn:How testing individual apartments can improve indoor air quality and reduce stack effect.The importance of airtightness testing in reducing energy waste and improving comfort.Strategies for improving building performance in various climates.Why continuous ventilation is crucial for modern buildings, and how to implement it effectively.Challenges with building codes in different regions and how they impact testing and energy savings.In This Episode:[00:00] - Introduction to Sean Maxwell and the importance of blower door testing[01:42] - Sean's background in building science and his journey from New York to Australia[03:33] - Discussing the challenges of airtightness in buildings and why it’s often overlooked[05:48] - Common issues causing air leaks: windows, doors, and poor construction practices[10:20] - How airtightness impacts building comfort and energy efficiency[13:07] - The importance of ventilation in airtight buildings and strategies for effective implementation[18:43] - Ventilation strategies: Exhaust fans, ERVs, and occupant-controlled systems[19:59] - Building code issues and differences in airtightness regulations across regions[27:19] - The need for collaboration in building science: Sharing knowledge aFollow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system. Download our FREE ebook and start solving problems like a pro. 👉 https://bit.ly/flow-lab-ebook--------------------------------In this episode of The Flow Lab Podcast, hosts Ben Walker and Sam Myers sit down with Denali Jones, Technical Director at the Air Barrier Association of America (ABAA), to talk about how large buildings are tested for air tightness and where things often go wrong.Denali walks us through his journey from starting out at Retrotec to leading airtightness training across the country. He explains what makes these tests challenging, how contractors can avoid common mistakes, and why having the right training and tools really matters.Whether you work in building science, test commercial properties, or just want to understand how building air leaks affect energy use and comfort, this episode breaks it all down from spotting hidden gaps to troubleshooting test-day problems like faulty fans or even elevator issues.What You’ll Learn:Why some parts of new and old buildings are often forgotten and how that affects test results.How Denali helped create the first nationally recognized training for testing large buildings.What to check when test results don’t make sense like unplugged equipment or bad setup.How testing two floors at a time helps deal with tall buildings and air pressure issues.What makes this new standard better than the old ones and how it helps testers and builders do the job right.In This Episode:[00:00] - Denali’s background and how he got started[04:50] - First testing jobs and early lessons[08:00] - Where buildings leak and why[13:08] - Testing tall buildings and working with city codes[19:28] - How the ABAA training program came together[26:49] - The most common mistakes testers make[33:52] - What’s next for airtightness testing[37:37] - Why it’s better to bring in testers early[44:44] - Tips for using fans and setting up safely[50:12] - Real-world testing results and future research plansConnect with Denali Jones:LinkedIn: https://www.linkedin.com/in/denali-jones-4b6b8375/ Connect with Company:Website: Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system. Download our FREE ebook and start solving problems like a pro. 👉 https://bit.ly/flow-lab-ebook--------------------------------In this episode of The Flow Lab Podcast, hosts Ben Walker and Sam Myers are joined by Barry Cope, Managing Director of ATTMA (Air Tightness Testing and Measurement Association), affectionately known as "Mr. Blower Door" in the UK. Barry discusses how ATTMA grew from a small group of enthusiasts into a global leader in blower door testing, certification, and industry training. He shares groundbreaking insights into data-driven building performance, the UK’s fully integrated Lodgement system, and ATTMA’s cutting-edge training house built inside a warehouse. With humor and unmatched expertise, Barry highlights the challenges of international code compliance, quality assurance, and the vision for bringing proven UK methodologies to North America.Expect to LearnDiscover how a four-person trade association grew to dominate 85% of the UK’s blower door testing market with over 180,000 tests annually.Get inspired by ATTMA’s full-scale training house inside a 10,000 sq ft warehouse, designed for high-pressure, real-world simulations.Explore the chaos of U.S. state-by-state code amendments versus the streamlined approach in the UK and how that affects adoption and testing quality.Learn how ATTMA’s Lodgement system helps governments track high-rise buildings, manage compliance, and even respond to national emergencies like Grenfell.Hear Barry’s journey from field tester to managing director, and how his multidisciplinary background shaped the future of UK air tightness testing.In Today’s Episode[00:00] - How ATTMA Helped Identify High-Rise Risks After Grenfell[01:13] - Introduction and Barry’s Role in the UK Blower Door Market[02:07] - What is ATTMA and How It Evolved[04:36] - Barry’s Entry into the Industry and ATTMA’s Transformation[06:25] - Building a Full-Scale Training House Inside a Warehouse[09:22] - Real-World Pressure Testing and Training Innovation[11:17] - Bringing the Lodgment System to the U.S.[16:00] - The Challenges of Code Fragmentation in the U.S.[21:37] - ABA’s Expansion and ISO Certification Progress[28:05] - Who Has Access to UK Building Test Data[34:18] - Air Tightness Metrics: Volume vs. SurFollow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system. Download our FREE ebook and start solving problems like a pro. 👉 https://bit.ly/flow-lab-ebookIn this episode of The Flow Lab Podcast, hosts Ben Walker, Co-CEO of RetroTec and Sam Myers, building science specialist and RetroTec trainer, sit down with Kevin Hart, Founder and CEO of HavenIAQ, a company focused on transforming the way we monitor and control indoor air quality (IAQ).From his roots as an electrician in the trades to pioneering the first wearable IAQ monitor, Kevin shares his journey of innovation, challenges faced in the industry, and his insights into solving air quality issues in homes and workplaces.Expect to Learn:How invisible air quality issues impact health and comfort in indoor environments, with a focus on tradespeople and homeowners alike.From spotting problems on job sites to creating solutions for air quality measurement and control.Challenges with early sensors, the breakthrough that led to portable devices, and the shift to whole-home IAQ solutions.How modern HVAC systems are evolving to intelligently manage ventilation and air quality based on real-time data and environmental factors.Navigating the complexities of IAQ products like UV lights and ozone generators and why they might not be the right fix.How Haven is shaping the next generation of smart IAQ products, from room monitors to advanced filtration and ventilation solutions.In Today’s Episode:[00:00] - Introduction to the Episode and Guest[03:30] - Kevin’s Transition from Electrician to Air Quality Innovator[07:00] - The Challenges of Early IAQ Sensors and the Need for Affordable Solutions[10:45] - The Move to Whole-Home Air Quality Monitoring[15:30] - The Importance of Smart Ventilation in Modern HVAC Systems[20:00] - The Risks of Overhyped IAQ Products: Ozone Generators and UV Lights[25:15] - The Role of Professionals in Solving IAQ Issues[30:00] - Exploring the New Room Monitor and Its Impact on Homes[35:20] - How the IAQ Industry is Evolving and the Need for Better Education and Training[40:00] - Final Thoughts and Future Innovations in IAQFollow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system.Download our FREE ebook and start solving problems like a pro.👉https://bit.ly/flow-lab-ebookIn this episode of The Flow Lab Podcast, hosts Ben Walker, Co-CEO of RetroTec, and Sam Myers, building science specialist and RetroTec trainer, sit down with Niek-Jan Bink, Director/co-owner at ACIN instrumenten and mastermind behind innovative tools like the Flow Finder Mk2+ and the ADT. Niek shares his fascinating journey from climate research to engineering HVAC solutions, while uncovering the evolving needs of ventilation systems around the globe. This is a must-listen for HVAC pros, energy auditors, and building scientists curious about the tools shaping better indoor air quality and airtight construction.Expect to Learn:From a handmade aluminum box to a smart, Wi-Fi powered airflow measurement device.A new tool that simplifies testing on large-scale housing projects without replacing the blower door.Discover how ultrasonic tools are transforming on-site diagnostics, no construction delays required.Why do the U.S. and Europe approach airflow, ventilation, and ductwork so differently.What Niek learned from experts like Bill Spohn and Colin Genge, and why curiosity is key in HVAC.In Today’s Episode:[00:00] - How it works with or without the blower door[01:13] - Meet Niek-Jan Bink and his work with ACIN Instrumenten in the Netherlands[03:54] - From climate researcher to co-owner of a cutting-edge HVAC company[06:30] - ACIN’s diverse innovations: from naval valves to plant research[08:52] - The origin story of the Flow Finder and 1980s ventilation failures[12:40] - Flow Finder Mk2+ development & challenges[18:00] - Ultrasonic leak detection tools: what's coming next[21:37] - Using Flow Finder and ultra graphics in prefab & commercial projects[28:32] - Breaking down the ADT’s functionality, limitations, and value[35:56] - Practical ADT case study in a Dutch apartment complex[44:11] - Achieving ISO 17025 accreditation & improving calibration uncertainty[47:22] - Flow Finder Mk2+ updates: new motor controller, better efficiency[52:56] - Extending the flow capacity up to 700 CFM[55:00] - Future software for hood-specific calibration[58:44] - U.S. use cases: whole-house ventilation, duct testing, and balancing[01:03:00] - Advice for young Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system.Download our FREE ebook and start solving problems like a pro.👉https://bit.ly/flow-lab-ebookIn this episode of The Flow Lab, hosts Ben Walker, Co-CEO of RetroTec, and Sam Myers, building science specialist and RetroTec trainer, are joined by Amit Gupta, the CEO of Aeroseal. Together, they explain the innovative world of air sealing technology, focusing on ductwork and building envelope sealing. The conversation examines into the challenges and breakthroughs in building performance, energy efficiency, and the future of sealing technologies, offering valuable knowledge for professionals in the HVAC and building science sectors.Expect to LearnThe evolution of Aeroseal’s technology from duct sealing to building envelope solutions.How the Aeroseal technology works, including its ability to fill air leaks in ducts and buildings.Insights into the challenges faced by builders and HVAC professionals in sealing air leaks.The environmental and financial benefits of improving air tightness in buildings.The potential of the Aeroseal technology to become standard practice in HVAC installations and home construction.In Today’s Episode [00:00] - Amit’s Journey to Aeroseal[00:59] - Introduction[04:03] - The Technology Behind Aeroseal[05:15] - How Aeroseal Works[07:22] - Expanding into Building Envelopes[10:41] - Challenges in Sealing and Pressure Dynamics[12:58] - Sealing Commercial Ductwork[16:01] - Sealing Process for Residential Systems[19:28] - Tax Incentives for Homeowners[26:00] - Growth of Aeroseal Worldwide[21:07] - Advice for Entrepreneurs[33:00] - Future of Building TechnologyConnect with the Guest: LinkedIn:https://www.linkedin.com/in/amit-gupta-36abb0/ Website: https://aeroseal.com/ Aeroseal Social media: Facebook: https://www.facebook.com/AerosealUSATwitter:Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system.Download our FREE ebook and start solving problems like a pro.👉https://bit.ly/flow-lab-ebookIn this episode of The Flow Lab Podcast, hosts Ben Walker and Sam Myers continue their conversation with Brendan Reid, a pioneer in home performance and HVAC sales. Brendan shares expert knowledge into ductwork efficiency, sales strategies, and the science of customer communication. He explains why smaller HVAC systems often perform better, the role of air sealing, and how to educate homeowners without overwhelming them with technical jargon. Whether you’re an HVAC professional or a building science enthusiast, this episode is packed with valuable takeaways to elevate your skills.Expect to LearnThe Power of Proper Duct Sealing, Why fixing duct leakage before upgrading HVAC systems leads to better efficiency and comfort.How to Communicate HVAC Benefits to Homeowners Using relatable analogies to explain airflow, ductwork, and energy efficiency.Mastering the Sales Process, Why sales objections should be seen as opportunities and how to use psychology to guide customer decisions.Behavioral Science in Sales, How asking the right questions keeps customers engaged and makes technical concepts easier to understand.The Future of HVAC Training Brendan’s insights into modern home performance solutions and upcoming sales education initiatives.In Today’s Episode [01:14] - Welcome Back to The Flow Lab Podcast[03:45] - The Importance of Clean Air and Ductwork Efficiency[06:12] - Using Analogies to Simplify HVAC Concepts[08:16] - The Psychology of Sales in HVAC[14:21] - Overcoming Sales Objections in Home Performance[20:30] - The Evolution of HVAC Testing & Airflow Science[26:15] - Moving Beyond “Energy Audits” to Customer Comfort[30:00] - The Power of Customer Education in HVAC Sales[35:50] - Final Advice for HVAC ProfessionalsConnect with Brendan Reid:LinkedIn: https://www.linkedin.com/in/brendan-reid-5255bbb/ Website Aeroseal: https://aeroseal.com/ Website SellMoreSeals: https://sellmoreseals.com/ Follow Hosts:Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system.Download our FREE ebook and start solving problems like a pro.👉https://bit.ly/flow-lab-ebookIn this episode of The Flow Lab, hosts Ben Walker and Sam Myers sit down with Brendan Reid, an industry veteran and founder of Retrotec, to look into the history and evolution of blower door testing, energy auditing, and building performance.Brendan shares his journey from chimney sweeping in high school to pioneering the blower door industry, detailing the innovations, challenges, and opportunities in building science. With knowledge of the energy efficiency, home performance diagnostics, and airtightness testing, this conversation is a goldmine for HVAC professionals, energy auditors, and anyone passionate about building performance.Expect to LearnThe history and evolution of blower door testing and how it changed the industry.Why energy auditing businesses struggle and how to make them more profitable.The story of Retrotech's  founding and its impact on airtightness testing.How technology advancements have improved duct sealing and home performance.Sales awareness for contractors looking to sell energy efficiency solutions effectively.In Today’s Episode [00:00] - Welcome to The Flow Lab & Episode Introduction[01:20] - Introduction of Brendan Reid and his Accidental Entrepreneur Journey[05:19] - Early Days of Energy Auditing & The First Blower Door[10:32] - Building Science Innovations & Testing Evolution[17:54] - How Retrotec Started & The Shift to Manufacturing[22:48] - Challenges in the Home Performance Industry[32:18] - Advice for Energy Auditors: Thriving Without Government Incentives[38:38] - The Role of Sales in Home Performance Contracting[43:24] - Lessons Learned & Reflections on the Industry’s GrowthConnect with Brendan Reid:LinkedIn:https://www.linkedin.com/in/brendan-reid-5255bbb/ Website Aeroseal: https://aeroseal.com/ Website Sell More Seals: https://sellmoreseals.com/ Follow Hosts:Ben Walker (Co-CEO, Retrotec) LinkedIn: Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system.Download our FREE ebook and start solving problems like a pro.👉https://bit.ly/flow-lab-ebookIn this episode of The Flow Lab, hosts Ben Walker and Sam Myers sit down with Colin Genge, founder of RetroTec and a pioneer in building science and HVAC innovation. They take a look at the origins of blower doors, the evolution of air tightness testing, and the future of energy conservation.Collin shares fascinating observations of the early days of RetroTech, the challenges of breaking into the market, and how the industry has changed over the years. He also  investigates renewable energy, AI, and the future of building performance.This episode is packed with wisdom for HVAC professionals, building scientists, and anyone interested in energy efficiency and technological advancements.Collin Genge is a pioneer in building science, best known for founding RetroTech, a leader in air tightness and HVAC testing equipment. With decades of experience, Collin has played a crucial role in shaping energy efficiency standards worldwide. Now retired and living in New Zealand, he continues to analyze renewable energy and disruptive technology.Expect to LearnThe garage startup story of RetroTech and the origins of blower doors.How energy conservation and air tightness testing have evolved since the 1980s.The impact of government programs and regulations on building performance.Why renewable energy and AI are shaping the future of the industry.Lessons from decades in business, including the challenges of entrepreneurship.In Today’s Episode [00:42] – Introduction                                                                                                                                  [02:04] – How the industry began                                                                                                            [02:36] – Collin’s experience with media and industry recognition    [03:22] – Collin’s Life After Retirement                                                               [05:16] – The origins of blower door testing in the 1980s                                                     ...Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

The basics to help you understand homes as a system.Download our FREE ebook and start solving problems like a pro.👉https://bit.ly/flow-lab-ebookWelcome to the very first and special episode of The Flow Lab, where hosts Ben Walker and Sam Myers sit down with Harold Orr, a pioneering figure in building science and energy efficiency. Harold shares the fascinating story behind the invention of the blower door, the groundbreaking Saskatchewan Conservation House, and how these innovations shaped modern air-tightness standards.With decades of experience, Harold explains the evolution of air leakage testing, the challenges of energy-efficient construction, and the importance of sealing techniques for sustainable buildings. This episode is packed with historical insights and practical knowledge for anyone interested in building science, HVAC, and home energy efficiency.Expect to LearnHow Harold Orr pioneered the development of the blower door and air-tightness testingThe origins of the Saskatchewan Conservation House and its impact on the Passive House movementThe evolution of building insulation and air barriers for energy-efficient constructionCommon misconceptions about air-tightness and the myth that "houses need to breathe"The "chainsaw retrofit" method for improving insulation in older homesIn today’s Episode[00:01:51] – Welcome to The Flow Lab[00:02:07] – The purpose of The Flow Lab[00:02:50] – Introduction to Harold Orr [00:04:40] – How Harold started working in air-tightness and building efficiency[00:16:30] – The birth of the blower door[00:22:18] – The Saskatchewan Conservation House[00:25:34] – How the Passive House movement was influenced by Harold’s work[00:33:57] – Vapor barriers, air sealing, and insulation techniques for modern construction[00:38:40] – The "Chainsaw Retrofit" method[00:46:35] – Do houses really need to "breathe"?[00:50:17] – Why air-tightness should be a building code requirement[00:55:37] – Harold’s lasting impact on building scienceConnect with Guest Harold OrrLinkedIn: https://www.linkedin.com/in/harold-orr-6858a3/Follow the HostsBen Walker (Co-CEO, Retrotec) LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer) LinkedIn: Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement

Welcome to The Flow Lab Podcast by Retrotec!This is a project that Ben and Sam have been working on for a while. The goal is to provide education and news on technology advancements in the industry through a new platform.In each episode, we interview industry leaders and innovators whether they have been in the industry for a while or are up-and-coming pros.Our first episode drops next week with special guest Harold Orr: Inventor of the blower door.Follow Hosts:Ben Walker (Co-CEO, Retrotec)LinkedIn: https://www.linkedin.com/in/ben-walker-4a05901/Sam Myers (Building Science Specialist & Trainer)LinkedIn: https://www.linkedin.com/in/sam-myers-ms-a9a4a546/Website: https://retrotec.com/Facebook: https://www.facebook.com/retrotec/Instagram: https://www.instagram.com/retrotec/YouTube: https://www.youtube.com/@RetrotecEnergy/Listen onSpotify: https://open.spotify.com/show/3xMDAhIttUTHWK41DH7KhBDon’t forget to subscribe for more episodes on airtightness, ventilation strategies, and innovations in building science!#BuildingScience #AirtightnessTesting #EnergyEfficiency #BuildingPerformance #HVAC #Retrotec #GreenStar #EnergyWaste #HomeImprovement