Blower Door Testing

Whole-House Air Infiltration

  As of July 1st, 2017, all new residential homes in Florida must pass a Blower Door (also known as House Infiltration) test to meet energy code. We are IDL Certified (Infiltration & Duct Leakage) by the Building Performance Institute, exceeding the FBC state requirements. Our Building Diagnostics are performed by Licensed Home Inspectors.

'Blower Door Testing is highly advised and beneficial to ALL homeowners, not just for code!' 


  Infiltration or uncontrolled air leakage into buildings is a result of the number and size of cracks and gaps in the building’s thermal envelope (its floor, walls, ceilings, windows, and doors) and the natural and mechanical air pressure “driving forces” that the building experiences.  Natural driving forces include wind, “stack effect” (air motion in buildings related to indoor-to-outdoor temperature difference and height) and atmospherically vented appliances. Mechanical driving forces include fans (such as exhaust and air handler fans), duct leakage, and others. A blower door must be used in conjunction with a duct tester to measure Duct Leakage to the Outside. 

  To address the energy and indoor air quality impacts of air leakage in homes, the current Florida Building Code includes a building air leakage testing requirement for new Florida homes and stipulates both a maximum air leakage rate and, at the lower end, an air leakage rate “trigger” at which whole-house mechanical ventilation is required. 



"Air leakage and infiltration greatly reduces energy efficiency, indoor air quality and comfort."

"Air leakage and infiltration greatly reduces energy efficiency, indoor air quality and comfort."

New FBC Requirements

Additional Code Information

The 6th Edition (2017) Florida Building Code air leakage testing requirements are specified in Section R402.4.1.2 of the residential Energy Conservation volume. This code section stipulates maximum leakage rates, how the test is to be conducted, who can conduct the testing, reporting requirements, and at what point in construction the test can be performed:

“The building or dwelling unit shall be tested and verified as having an air leakage rate not exceeding seven air changes per hour in Climate Zones 1 and 2, and three air changes per hour in Climate Zones 3 through 8. Testing shall be conducted in accordance with ANSI/RESNET/ICC 380 and reported at a pressure of 0.2 inch w.g. (50 pascals). Testing shall be conducted by either individuals as defined in Section 553.993(5) or (7), Florida Statutes, or individuals licensed as set forth in Section 489.105(3)(f), (g) or (i) or an approved third party. A written report of the results of the test shall be signed by the party conducting the test and provided to the code official. Testing shall be performed at any time after creation of all penetrations of the building thermal envelope…”

"Although this is 'New' to FL, it has been mandatory in many states for over a decade."

"Although this is 'New' to FL, it has been mandatory in many states for over a decade."