A standard airtightness test of a house can usually be completed in 30 minutes or less. Once you arrive at a house, the Blower Door can typically be installed in about 5 - 10 minutes. Additional preparation and inspection of the house prior to beginning a test adds another 10 minutes. At this point, a test of the house to determine the overall leakage of the envelope can be conducted in less than 5 minutes.
Once the simple airtightness test has been completed, additional diagnostic procedures to find and prioritize the major leakage sites can add another 20 to 45 minutes depending on the size and complexity of the house, and the procedures used.
A standard airtightness test of a duct system using a Duct Blaster usually takes a little longer than a house test (about 15 - 20 minutes more), due to the need to temporarily seal all registers and grills before starting the testing procedure. Use of an adhesive backed register sealing material, such as TEC's Duct Mask, can keep this additional time investment to a minimum.