Blower Door Test Calculations

There are three primary components to a blower door.

Blower door test calculations.

Flow inputs target permeability m3 h m2 50pa. C is the climate factor and depends on both the wind and temperatures for the climate see map below. Understanding blower door test results. Simply put a blower door is a diagnostic tool used to measure how much air infiltration air leakage occurs in a house.

N c h s l. 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. Blower door sample calculation air infiltration. Ach50 is the blower door flow rate at 50 pa depressurization as measured in the blower door test n is a factor that depends on the climate and characteristics of the house see 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. Results unit of air flow measure m3 h l s number of fans needed fan type test pressure brand model no. A blower door is a machine used to measure the airtightness of buildings. The factor n is.

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. 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. What is the building envelope click here to find out.

And the indicated qn that is the number that the test has to be less than or equal to. Of fans 25pa 50pa 75pa total.