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BlackSheepRehab / Black Sheep Rehab
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2023-12-27 05:36:56

BlackSheepRehab on Nostr: First blower door test. How did that result happen?!? That’s Passive House level! ...

First blower door test. How did that result happen?!? That’s Passive House level! Certainly well above my target of “better than we used to build”

This is our 2nd new construction using Zip-R sheathing and trying to build an air-tight enclosure. It is our first blower door test except trying it on our own homes. 7ACH on the 1990s construction, 17ACH on the 1912 house. I’ve double checked the volume numbers of 36723 cuft which is the biggest determiner of the ACH number. We were blowing 350 CFM to hit our 50PA so we do seem on the right order.

Caveats to the test. We sealed all duct penetrations at the exterior duct terminus (makeup air, laundry, HRV). Not all of these are hooked up yet so the eventual dampers may not have been ready. Once HVAC rough-in is complete we will retest and sealing the interior of laundry vents or undampered fresh air intakes. But otherwise allow air leakage through exterior connected ducting to occur.

Also electrical and hose bibb penetrations are not yet complete.

This is monopoly framing. Fully encapsulated crawl and attic space.

18 sq in. Equivalent hole @ 4 Pa.

#newconstruction #construction #generalcontractor #investorlab #realestateinvestor #keepthecraftalive #yamhillvalley #framing #buildingscience #blowerdoor #carltonoregon #passivehouse
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