Retrotec - IBS 2022
HVAC School - For Techs, By Techs
Bryan Orr
4.9 • 1K Ratings
🗓️ 26 April 2022
⏱️ 9 minutes
🧾️ Download transcript
Summary
Sam Myers with Retrotec talks to Bryan about pressures in the home and why they matter for HVAC solutions at IBS 2022.
Technicians focus a lot on ductwork and airflow, but many of them don't focus on how the building envelope impacts HVAC performance. A lot of the HVAC equipment's performance is affected by the push and pull of air caused by leaky areas in the building envelope.
If you have a room with too much air and another room with too little, you will have unbalanced pressures. Unbalanced pressures may result in discomfort and latent load issues, especially when unconditioned air is pulled in through the attic. Sealing the envelope well and using dampers as necessary can minimize the comfort issues caused by pressure imbalances in the home.
Instead of just using manometers for static and gas pressure, we can also use high-resolution manometers under doors to pick up pressure differences. However, the manometer MUST be high-res to pick up those subtle (but palpable) differences in pressure. A blower door is also a great tool, especially when you use it with a thermal imaging camera; the blower door amplifies the temperature effects that a thermal camera will detect, especially if you also have a good delta T.
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Transcript
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| 0:00.0 | Hey, this is the HVAC school podcast. I'm Brian. This is a short episode. And this short episode is from the International Builders Show in Orlando, 2022, with my friend Sam Myers from Retro Tech. |
| 0:16.4 | Sam is a really great guy and has a lot to say about building performance and how that kind of |
| 0:21.6 | intersects with |
| 0:23.2 | HVAC. So in this episode we talk quickly about some of what he wrote |
| 0:28.1 | about in the article about how houses don't have manuals, how to think about zonal pressure, some things that you can do with |
| 0:34.8 | precision monometers that maybe you didn't think about. |
| 0:37.7 | But anyway, just a quick one. |
| 0:38.9 | So here we go. |
| 0:39.5 | Sam Myers and I having a conversation at IBS 2022. Anyway, before we do that, let's hear from our great sponsors. |
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| 1:04.8 | fault whatsoever. |
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| 1:14.0 | Visit escogroup.org to view their warehouse of book titles, certifications, and |
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| 1:28.0 | Be sure to enter coupon code HVAC School 22 |
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| 1:38.0 | and use the coupon code HVAC School 22 |
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