Here we share some observations about and snapshots of
the Passive House
we had built in Oakland County, Michigan. All photographs were taken by us unless otherwise noted.
—Maura and Kurt Jung
Exemplary results in blower door test
Tuesday, 11 December 2012
Matt Rosendaul of Great Lakes Home Performance and student Eric conducted
tests to evaluate the building shell’s air tightness, a key principle of
Passive House design. The tests were performed with a computer controlled duct
instrument, typically more sensitive than a blower door unit, in a window
frame. The results, 0.39 ACH (air changes per hour) at a positive 50 pascal
differential, and 0.42 ACH at a negative 50 pascal differential, fall below the
Passive House standard of 0.6 ACH by a wide margin. Numbers this low are a
testament to meticulous architectural detailing and diligent construction
A thermal imaging camera was used to scan the interior for thermal trouble
spots. Interestingly, the warmth left by a hand on the inside surface of a
triple pane window for ten seconds lingered a very long time, indicating the
strong insulation properties of the installed glazing.
On another note, a new blog entry on the G•O Logic Homes website
provides a good summary of the project as our house nears completion.