Based on the CO2 decay in our ~380sqft (~35m^2) utility building, I've calculated it has a natural ACH (not ACH50) of ~0.07.
Considering the building is still under construction, and the insulation + interior air barrier (walls and ceiling) isn't yet installed, I'm very happy with this.
Our goal is to make it as airtight as possible and then ventilation will be actively managed with a Lunos e2 HRV.
#vermont #construction #highefficiency #building #passivehouse #passivhaus #lunos


