Chris starts by doing a depressurization blower door test. He installs a speed controller to let the fan cruise itself. He sets the square footage of the house and opts to view the ACH50, or air changes per hour under the test pressure conditions. (ACH represents air changes per hour under normal conditions.)

The test conditions allow us to set a baseline and interpolate those measurements and draw a line on a graph when we do multipoint tests. You can connect the TEC Auto Test app to the gauge on a TEC blower door, run the tests according to the standards you set in the app, and receive a report through the app.