Blower Door Test Calculations

The factor n is.

Blower door test calculations.

Results unit of air flow measure m3 h l s number of fans needed fan type test pressure brand model no. Simply put a blower door is a diagnostic tool used to measure how much air infiltration air leakage occurs in a house. Flow inputs target permeability m3 h m2 50pa. N c h s l.

After installation of the complete air distribution system but before installation of insulation and sheet rock. Understanding blower door test results. 1 a calibrated variable speed fan capable of inducing a range of airflows sufficient to. Of fans 25pa 50pa 75pa total.

A blower door is a machine used to measure the airtightness of buildings. 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. 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. Number of blower door fans needed for commercial blower door air tightness testing.

There are three primary components to a blower door. What is the building envelope click here to find out. Blower door sample calculation air infiltration. C is the climate factor and depends on both the wind and temperatures for the climate see map below.

And the indicated qn that is the number that the test has to be less than or equal to. 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.