Blower Door Test

A blowerdoor is a  device for testing the air-tightness of a building. It consists of a calibrated  fan for measuring an air flow rate and a pressure sensing device to measure the  pressure created by the fan flow. The combination of pressure and flow can be  used to estimate the air-tightness.

Some reasons for  establishing the proper building tightness:

• Reducing energy consumption due to  air leakage
• Avoiding moisture condensation  problems
• Avoiding uncomfortable drafts caused  by cold air leaking in from the outdoors
• Making sure that the home's air  quality is not too contaminated by indoor air pollution.