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BLOWER DOOR TESTING

Measured Air Leakage

 

HOW DOES A BLOWER DOOR TEST WORK? 

A blower door is used on buildings to measure air leakage through the building envelope. The test is performed with a calibrated variable speed fan and a digital pressure measuring instrument.


The blower door fan induces a range of airflows to depressurize a building. Our instruments use Bernoulli's Principle to calculate flow rates from pressure differentials. Results are expressed in cfm or ACH (air changes per hour).

IECC 2015 requires homes to achieve an air leakage rate less than or equal to 5 ACH.

 

IECC 2015 REQUIREMENTS:

     •g) Air leakage. - R402. 4 is hereby amended to read:

                Air leakage. -- The building thermal envelope shall                             be constructed to limit air leakage in accordance with the                 requirements of Sections R402. 4. 1 through R402. 4. 4.

               Exception: Dwelling units of R- 2 occupancies and                               multiple single-family dwellings shall be permitted                             to comply with IECC Section C402. 5.

     •h) Testing. - R402. 4. 1. 2 is hereby amended to read:

              The building or dwelling unit shall be tested and verified                    as having an air leakage rate not exceeding 5 air changes                  per hour in Climate Zones 1 through 8. Testing shall be                      conducted in accordance with ASTM E 779 or ASTM E                       1827 and reported at a pressure of 0.2-inch w. g.                                   (50 Pascals). Testing shall be conducted by 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.

Blower Door in Operation (2).JPG
 
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BLOWER DOOR TEST (RESIDENTIAL)

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For a Multi-family unit and Small Commercial Properties, please call for estimate.