After completing the structural framing phase of our Passive House in Mountain Lake Park, we were thrilled with the results from the first blower door test. Designed by Carri Beer of Brennan and Company Architects, and Michael Hindle from Passive to Positive, this home could be the first certified Passive House in Garrett County. Our crew spent a lot of time working to seal every potential thermal break. Thermal breaks could happen at any utility penetration, plywood seam, and exterior framing connection.
As we were all huddled inside, we started the blower door test, and had to go all the way down to the smallest flow ring available on the fan. The rings are necessary when measuring air tight houses. Even Mark Watkins from Hot Shotz was shocked with our results of .2 ACH50. Maryland energy code requires 3 or better, and the Passive House requirement is .6 to pass. The next blower door test will happen after the exterior TJIs and insulation go on.