Blower Door Test Calculations

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 test calculations.

C is the climate factor and depends on both the wind and temperatures for the climate see map below. 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. 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 sample calculation air infiltration.

And the indicated qn that is the number that the test has to be less than or equal to. Simply put a blower door is a diagnostic tool used to measure how much air infiltration air leakage occurs in a house. A blower door is a machine used to measure the airtightness of buildings. The factor n is.

Understanding blower door test results. 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. 1 a calibrated variable speed fan capable of inducing a range of airflows sufficient to.

After installation of the complete air distribution system but before installation of insulation and sheet rock. N c h s l. Number of blower door fans needed for commercial blower door air tightness testing. Flow inputs target permeability m3 h m2 50pa.

Results unit of air flow measure m3 h l s number of fans needed fan type test pressure brand model no. What is the building envelope click here to find out.