Derek ColeGM, Simmons One Hour Heating & Air · AI HVAC Answers

How Do I Know If I Need My HVAC Duct Sealed?

9 Jan 2018 · 1 min

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0:53

Derek Cole explains how to test your HVAC ducts for leaks using a pressure test to measure air loss. Energy Star says ducts can lose 20 to 30 percent of air, but if your test shows 4 to 5 percent loss, sealing probably isn't worth it. Around 20 percent loss means you should consider sealing.

Questions this video answers

4–5% air loss (test result mentioned by the speaker).

~20% air loss (test result mentioned by the speaker).

20–30% of air lost from the duct system (per Energy Star, as cited).

Chapters

Another thing we do when people are not sure if they want to go ahead and do a duct sealing or not is we go ahead and send the crew out, do a pressure test on that duct system, which will give us a reading of how much air is being lost, and then at that point, the homeowner can make a decision. Yes, I want to go ahead with it. No, I don't want to go ahead with it. We've had both. Yeah, we've had both. So, you know, we've done the test before and it's come back 4 or 5%. It's not really worth it. Don't worry about it. And we've done tests before where it's come back 20%, and we need to go ahead and do a dose of it. So if you're not sure and you don't have a technician out, we will come out, hook up the machine, do a test on it, see where we are. Because according to Energy star, you know, 20 to 30% of your air is being lost from the duct system.