Sunday, March 2, 2008

The Blower Door Challenge






The excitement is escalating. When John & I surveyed the progress being made to date, we decided it was going to be a shame to cover up such fine carpentry with interior finishes. Nathan and the crew of carpenters can not be commended enough for their fine craftsmanship and the attention to detail that they are giving this project.
We as a team are determined to prove that we can meet or exceed the air tightness required by the The Passivhaus Institute. They require that the air change rate of the building shell is limited to 0.6 air changes per hour, in reference to the buildings volume, at 50 pascal pressure differential. Construction to this tightness will be a challenge indeed because it is about 20 times tighter than a typical home construction. A blower door test after the construction is complete will indicate whether we have succeeded.

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