Our first duct blaster (blower door) reading at Country PH

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Our initial duct blaster test for monitoring the air tightness of the building envelope was very good. The closed shell read at 0.18 ACH (air changes an hour) @ 50 Pascals (of pressure as measured).  Official Passive House compliance is < or = 0.6 @ 50 Pascals.  The duct blaster gives more accurate readings for tight construction than a blower door test. These are excellent closed shell results.   Although we realize that the numbers will increase once the doors and windows are installed, due to creating openings. We commend our framing crew for the diligent and, as always, meticulous, great work.   blower door photo