Blower Door Test Procedure

Ordinary least squares regression analysis is then used to calculate the leakage characteristics of the building envelope.

Blower door test procedure.

As discussed in more detail later in this guide the air leakage test or blower door test uses a calibrated fan and digital pressure gauge to either pressurize or depressurize a home to a standard test pressure of 50 pascals with respect to the outside and measure the air leakage flow at that pressure. As air is exhausted out of the house or building envelope the house becomes depressurized relative to the air pressure outside the house. Once you ve got those results unseal the vents and run your blower door test. The world s leading manufacturer of building diagnostic tools.

Using a blower door only not recommended the basic idea behind using a duct leakage tester to test for duct leakage is. Measure the airflow through the fan with the duct system at pressure. We ll also get to find out what the major inf. Use a calibrated fan to pressurize the duct system.

These are some reasons for establishing the proper building. Blower door testing is usually performed in a depressurization mode. C building and n building. If it s a hot humid or cold day when you run the blower door first you re making the house uncomfortable for the whole time you re setting up the duct leakage tests.

Blower door test during a home energy audit. A blower door test is used on buildings in order to quantify the amount of air leakage through its enclosure. Typical p n building values are 5 10 20 30 40 and 50 pascal. The second part of this series will pick up with our blower door test from the moment we turn on the manometer.

Our energy saver 101 infographic explains the importance of a blower door test during a home energy audit. Then run your two duct leakage tests. Holtkamp heating a c inc. Retrotec has been manufacturing blower door and duct testing equipment for over 30 years.

The multi point blower door test procedure results in a series of known values of q n fan and p n building. When the fan is turned on it creates a pressure difference between the outside and the inside.