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PODCAST

The Building Science Podcast

Positive Energy

The Building Science Podcast is a show hosted by MEP engineering firm Positive Energy principal Kristof Irwin. The show covers everything from the basics of building science to adjacent scientific disciplines to more fully understand how the built environment shapes our lives as human beings on planet earth.

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All Episodes

01:18:18

The Future of Homes

The Building Science Podcast ·

2023/08/17

Today we are going to dig into The Future of Homes with two home builders intent on delivering that future in the present. How do we make truly healthy, exceptionally durable homes that also respect the environment, the new normal?What are we doing in residential construction today that we’ll look back on and say “Remember when we used to do that?” Conversely, what are we doing that is “new” and unconventional today but will come to be a widespread, mainstream practice? These are the opening topics

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01:15:29

Hempcrete Homes: A Growing Industry

The Building Science Podcast ·

2023/08/09

Why is the AEC industry still mostly ignoring hempcrete? There are a host of good reasons to use this renewable and low environmental impact material in homes and buildings - including indoor air quality, acoustics, thermal comfort, and energy performance - yet the mainstream market is still largely uninformed and continues to deliver today’s houses with yesterday's material palettes. With industrial hemp coming online fueled by new legislation, favorable economics and strong market potential - amid

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1:08:10

Architectural Solar: A New Normal

The Building Science Podcast ·

2023/08/02

The best place to generate electrical power is where it’s used. We all know that solar PV adds value for both owners and society by improving resilience, reducing energy costs and decreasing carbon emissions and climate impact. Yet traditional design practices and compressed schedules make it challenging for project teams to include integrated solar on their designs.The solution is Architectural Solar and the Architectural Solar Association knows that the key moves are early engagement and

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01:22:24

Build. Not too much. Mostly with plants.

The Building Science Podcast ·

2023/07/19

There has never been a better time or opportunity to completely rethink the way we approach the practice of architecture and construction. With climate change looming over us, becoming more visible by the day, a critical look at the materials we use and their impacts on emissions is needed. Enter natural building materials. Which ones are legit? How can we use them? Join Kristof as he interviews architect and builder, Greg Esparza, with a sweeping introduction to mass timber construction, as well as

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01:28:53

Building Science Journalism

The Building Science Podcast ·

2023/07/12

We live in the information age. The quality of the information we receive determines the quality of our decisions and the effectiveness of our actions. It is also no secret that money holds influence, and the methods through which we obtain information, as well as the economic dynamics of the building science and construction industry, are undergoing constant change.We invite you to join us in exploring the significance of Building Science Journalism in today's world. Our conversation features two

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00:56:13

Low Carbon Buildings - What’s Next? Wow. Just Wow

The Building Science Podcast ·

2023/07/05

You’re in for a feast of ideas here. Join us as Kristof talks with Bruce King about his work as a stubborn optimist and powerful motive force in the realm of low carbon buildings. Bruce joins a wise heart with a clever mind and a deep understanding of the technical aspects and implications of the role of energy and carbon in how we, as a society, deliver buildings to ourselves.Today’s interview discusses themes from Bruce’s new-at-the-time book Build Beyond Zero written along with friend and

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00:20:44

Direct DC-to-LED Lighting (Bonus Short Episode)

The Building Science Podcast ·

2023/06/30

Producer’s note: after a regrettably long COVID-19 disruption, this fun bonus short episode (recorded live in 2018) finally gets to see the light of dayAre you open to rethinking how you provide lighting to your home? What if there were a lighting system that not only saves you time, money and energy, but also enhances your experience of the living space?I think we all already know that running 120V AC around a home to power DC LEDs leads to a lot of warm AC-to-DC transformers and wasted energy. We

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01:13:53

An Introduction to Embodied Carbon & Buildings

The Building Science Podcast ·

2023/06/28

Is a building more like a river or a rock? A building seems to just sit there*, so in that sense it seems to be more like a rock. But in reality every building material, and thus the entire building itself, is a snapshot in time of a river of resources and energy flowing from natural ecosystems into our use, and then, ultimately flowing back into the environmentAll along the way, this flow of energy and resources emits carbon and other molecules into the sky, changing atmospheric chemistry and

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01:20:04

Do you like it hot? Do you want it now? Do you want...

The Building Science Podcast ·

2023/06/21

Gary Klein is in hot water and that’s a good thing. Hot water is the often-overlooked aspect of energy use in our homes and buildings and that makes zero sense. Energy for water heating is either the second largest, or in some cases the largest single energy use and does not get enough attention.As if that were not motivation enough, hot water is also the place where convenience and energy savings align perfectly because no one wants to wait for hot water and no one (arguably) wants to needlessly

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01:02:30

Building Passion For Passive

The Building Science Podcast ·

2022/11/04

Knowing how to build fantastic high performing buildings is not enough; we need to cause that to actually happen. We need high performance buildings to exist. Knowing how is necessary, but also clearly not sufficient. During this time of increasing urgency to realize new performance outcomes, we need new skills in order to fulfill our roles in society as architects, engineers, builders and trades. What this means is that we need to think about what actually works and then do a lot of that right now

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01:05:11

Proving Passive House Is Practical, Possible, &...

The Building Science Podcast ·

2022/09/26

Join Kristof as he interviews architect and Passive House nerd, Trey Farmer, in a wide ranging discussion about remodeling his personal residence. The ambitious project was an endeavor to prove to the Austin architecture and construction community that beautiful, well designed single family passive houses were not only possible in the market, but also quite practical and able to be built without breaking the bank or special products. Trey’s emphasis on community and his own business endeavors all

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00:58:44

The Business of Building Science

The Building Science Podcast ·

2022/01/12

Happy New Year! Welcome back to the 8th season of our little show. We can hardly believe it. In this episode, we ask the question “what is it actually like to run a business that focuses on building science?” Turns out, we know something about that. Join Kristof and Miguel in a discussion about the challenges, joys, and future of business model innovation as building scientists and entrepreneurs. You can learn more about our Performance Consulting and Residential MEP services on our company website

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01:12:21

Energy With Memory

The Building Science Podcast ·

2021/11/09

The famous astronomer and educator Carl Sagan once said, “If you wish to make an apple pie from scratch you must first invent the universe.” What Sagan was pointing at is the fact that for us to really do anything from scratch, we have to understand the system in which we exist.The planet and all its inhabitants exists as a massive, complex system of interconnected systems that we don’t always see. For example, the COVID-19 pandemic has clearly shown us that public health is part of a global web,

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01:09:06

Keep It Dry !

The Building Science Podcast ·

2021/11/04

Do we really need dehumidifiers when we’ve got VRF units? How do dehumidifiers work? Why do we need dehumidifiers now when we’ve never had them before? These are valid questions that deserve scientific answers and we’re here to dig in. Join Kristof as he interviews David Treleven and Nikki Krueger of Madison Industries (makers of dehumidifiers, ERVs, and many other innovative indoor air quality products). TeamHosted by Kristof IrwinEdited and Produced by M. Walker

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00:53:20

PFAS In Building Products

The Building Science Podcast ·

2021/11/04

One of the most uncomfortable topics for anybody to wade through is the nearly ubiquitous and constant exposures to hazardous chemicals and compounds which we all encounter in daily products. The construction industry is no different - many building products are chock full of chemicals that are known health hazards to humans. As the body of scientific knowledge about these chemicals and their health impacts grows, it’s important that professionals and consumers have a sufficient understanding of

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00:59:07

Zen & The Art of Continuous IAQ Monitoring

The Building Science Podcast ·

2021/06/23

The world of indoor air quality monitoring can feel like the Wild West and it’s high time we sort it out. Join Kristof as he interviews Stanton Wong, President of RESET Standard, about the landscape of sensor technology, accuracy, data reliability, how SARS2 moves around public spaces, and a range of other indoor air quality topics. You may be surprised by how deep this field of applied science can go.TeamHosted by Kristof IrwinEdited and Produced by M. Walker

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01:22:19

To Grow A Home, To Grow A Future

The Building Science Podcast ·

2021/05/03

Industrial hemp is poised to proliferate across many verticals in the construction materials marketplace. It’s a raw material with an unfortunately politicized history and so many potential applications it’ll make your head spin. Join Kristof and Miguel in conversation with Mattie Mead and Henry Valles as we explore the many intersections of industrial hemp and the built environment. TeamHosted by Kristof IrwinEdited and Produced by M. Walker

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01:11:27

One Wheel Down and The Axle Dragging: The Texas Grid...

The Building Science Podcast ·

2021/03/10

Valentines Day 2021 began a hellacious week for Texans as not one, but multiple critical infrastructure grids failed amidst prolonged record low temps. Join Kristof as he interviews Dr. Joshua Rhodes and Dr. Charles Upshaw, of IdeaSmiths (and of Positive Energy if you don't mind the bragging). In this episode we discuss what happened in Texas, separating myth from fact and understanding the role of buildings in the equation.TeamHosted by Kristof IrwinEdited and Produced by M. Walker

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01:09:40

Indoor Data Quality

The Building Science Podcast ·

2021/02/01

We’ve talked a lot about indoor environmental quality on this show, but what how do we measure that and how do we know that our measurements were consistent and accurate? Turns out, data quality in the built world can be quite opaque and challenging to reign in. But there’s hope. Join Kristof as he interviews Anjanette Green, Director of standards at RESET about the nature of data quality in the built world and how it impacts the daily lives of practitioners and occupants across the planet.

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00:58:30

What Would This Old House Say?

The Building Science Podcast ·

2020/11/20

This Old House has been the gateway experience for countless numbers of building science enthusiasts and we’d wager many of you listeners have intersected with the show at some point in your life and career. Media, whether television or podcasting, is about so much more than sharing information - it’s about telling stories. And the important stories are the ones that change paradigms and facilitate progress in the world. Join Kristof as he interviews Chris Ermides of This Old House and the Ask This

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