Blower Door Test Calculations

Last year we built an energy star home for a customer and we used a blower door test to evaluate the houses air infiltration performance.

Blower door test calculations.

Understanding blower door test results. And the indicated qn that is the number that the test has to be less than or equal to. 1 a calibrated variable speed fan capable of inducing a range of airflows sufficient to. There are three primary components to a blower door.

A blower door is a machine used to measure the airtightness of buildings. What is the building envelope click here to find out. After installation of the complete air distribution system but before installation of insulation and sheet rock. Results unit of air flow measure m3 h l s number of fans needed fan type test pressure brand model no.

The factor n is. 50 cubic feet per minute air movement at 50 pascals from the blower door reading cfm s it takes to achieve 50 pascals pressure difference inside to outside depressurize the building. Cubic feet per minute of air leakage at 50 pascals of pressure rough in. Duct testing calculator new construction air leakage testing calculator blower door test cfm50.

C is the climate factor and depends on both the wind and temperatures for the climate see map below. It can also be used to measure airflow between building zones to test ductwork airtightness and to help physically locate air leakage sites in the building envelope. Of fans 25pa 50pa 75pa total. Flow inputs target permeability m3 h m2 50pa.

Simply put a blower door is a diagnostic tool used to measure how much air infiltration air leakage occurs in a house. Blower door sample calculation air infiltration.