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.

Exterior of the residence all taped up

Exterior of the residence all taped up

 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. 

Our crew is meticulous to make sure any penetration through any air barrier is sealed and inspected

Our crew is meticulous to make sure any penetration through any air barrier is sealed and inspected

From the framed wall to the block wall, intersections like these become crucial in eliminating any thermal bridging

From the framed wall to the block wall, intersections like these become crucial in eliminating any thermal bridging

Jeff admiring the air barrier and taping 

Jeff admiring the air barrier and taping 

B-ring shown here for the blower door test

B-ring shown here for the blower door test

C-ring is shown here.  Time to get the D and E rings!

C-ring is shown here.  Time to get the D and E rings!