We did our first blower door test on our Madrona St. project today. We were shooting for under 1 air change per hour at 50 pascals negative pressure. This is a very tight building. Well we hit it and then some. Readings in the .8-.9 ACH range. This is excellent, especially since we still need to do the blown in blanket insulation and drywall!
Reading on the meter
Blower door assembly in place
Why does it matter? Air leaks are largely responsible for energy loss. It is why a home loses heat, feels drafty and how allergens can enter your home.
Robert Stockman of Pinnacle Inspection did the test for us. He is also doing third party verification for Built Green, NW EnergyStar, and LEED certification on this project.
This project has it’s own blog: Netzero Homes It covers the project in greater depth.