Blower Door Test Procedure

Instead do all your setup upfront.

Blower door test procedure.

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. Once you ve got those results unseal the vents and run your blower door test. Then run your two duct leakage tests. The world s leading manufacturer of building diagnostic tools.

C building and n building. As air is exhausted out of the house or building envelope the house becomes depressurized relative to the air pressure outside the house. Professional energy auditors use blower door tests to help determine a home s airtightness. Measure the airflow through the fan with the duct system at pressure.

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. The second part of this series will pick up with our blower door test from the moment we turn on the manometer. Blower door test during a home energy audit. Typical p n building values are 5 10 20 30 40 and 50 pascal.

Our energy saver 101 infographic explains the importance of a blower door test during a home energy audit. Use a calibrated fan to pressurize the duct system. Holtkamp heating a c inc. Retrotec has been manufacturing blower door and duct testing equipment for over 30 years.

We ll also get to find out what the major inf. When the fan is turned on it creates a pressure difference between the outside and the inside. The multi point blower door test procedure results in a series of known values of q n fan and p n building. Using a blower door only not recommended the basic idea behind using a duct leakage tester to test for duct leakage is.

These are some reasons for establishing the proper building. Blower door testing is usually performed in a depressurization mode.