Should I be adjusting my blower door readings for temperature and altitude?
The temperature of air affects its density. When air heats up it expands, and when it cools it contracts. Because of this and other effects, we need to make an air density adjustment. For example,…Continue Reading
Blower door test with wrong ring setting on gauge. What to do?
I Did A Blower Door Test With The Wrong Ring Setting On My DG-700. Is There A Way To Calculate The Correct Reading? Yes, there is. Channel B of the DG-700 is actually measuring a…Continue Reading
The history of the blower door
The blower door as we know and love it today springs from technology first used in Sweden in 1977, where it was actually a blower window. The idea migrated to the United States with Ake…Continue Reading