Blower Door Testing

A blower door is a calibrated fan (or blower) in a portable expanding frame, typically installed in an exterior door opening. A blower door measures the total air flow rate through all of the openings in a house by extracting air pressure drop across the house. From this information the area of all the house cracks and openings can be calculated to determine:

How much air must be added to change a building from operating under negative air pressure to operating under a positive air pressure, or vice versa.
Where the leakage occurs and exactly how much air is being let out before restoration.
If there are any hidden or overlooked areas where air leakage occurs so they can be corrected.
The positive results from the restoration work after completion. This will show you the improvement on your home and the money you will save from heat and cooling loss.


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