As winter closes in, work continues on this Passive House project. The Intus triple glazed doors and tilt-turn windows are due to be delivered next week. When they are installed, we can perform a preliminary blower door test, to see how close we are to the mythic air tightness requirement of 0.6 ACH.
In the mean time, the duct system has already been installed, with dual distribution systems for tempered air, and for fresh air supply and exhaust. As soon as the building is closed in, other rough-in work will continue.