Blower Door Test Formel

Blower door sample calculation air infiltration equation.

Blower door test formel.

These are some reasons for establishing the proper building tightness. A blower door test is used on buildings in order to quantify the amount of air leakage through its enclosure. That would be about 23 cfm50 for each square inch of eqla. Reducing energy consumption due to air leakage.

The bottom line is blower door testing is an easy way to determine how well sealed a home is and also an effective tool at locating air leaks. During this test a calibrated fan is installed in an otherwise sealed door or window while all the other openings to the exterior are closed. In fact we were able to identify some bad weatherstripping on one of the exterior doors during the test. Where required by the code official testing shall be conducted by an approved third party.

Professional energy auditors use blower door tests to help determine a home s airtightness. More recently in an article by an editor of journal of light construction a duct blaster was used to conduct a blower door test in a very tight house. A written report of the results of the test shall be signed by the party conducting the test and provided to the code official. A blower door is a machine used to measure the airtightness of buildings.

The building or dwelling unit shall be tested and verified as having an air leakage rate of not exceeding 5 air changes per hour. Testing shall be conducted with a blower door at a pressure of 0 2 inches w g. Testing shall be conducted with a blower door at a pressure of 0 2 inches w g. Ach 50 cfm 50 x 60 volume ach 50 must be 7 or less ach 50 air changes per hour at 50 pascals cfm 50 cubic feet per minute air movement at 50 pascals from the blower door reading cfm s it.

Blower door testing is usually performed in a depressurization mode. The conclusion was that the 50 65 cfm50 equated to an eqla of about 2 sq. As air is exhausted out of the house or building envelope the house becomes depressurized relative to the air pressure outside the house. It can also be used to measure airflow between building zones to test ductwork airtightness and to help physically locate air leakage sites in the building envelope.

Air leaks are easily located by the loud sound of air rushing through the openings. Blower door and infiltration testing. If so it. Wilson services has been offering blower door services since 2004.

Where required by the code official testing shall be conducted by an approved third party.