The Blower Door Testing Calculator -

Number of blower door fans needed for commercial blower door/air tightness testing.

Flow Inputs

Target Permeability (m³/h.m²@50pa):

Envelope Area (m²):

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

Results

Unit Of Air Flow Measure

m³/h l/s

Number Of Fans Needed

Fan Type			Test Pressure
Brand	Model	No. of fans	25pa	50pa	75pa

Total Air Flow Through Building Envelope

Total Air Flow: 10

Equivalent Leakage Area

Pressure	Hole Size (m²)