Blower Door Test Results

Better consistency and reproducibility occur at higher pressures.

Blower door test results.

The following will help you conduct your. I used to go in and do the blower door test first then set up and run the two duct leakage tests. Professional energy auditors use blower door tests to help determine a home s airtightness. A blower door test is used on buildings in order to quantify the amount of air leakage through its enclosure.

If you ve done any of this testing you know that it takes much longer to set up for the duct leakage testing. He will systematically move about your home setting up the house for the test. Blower door test results are standardized for an air pressure difference of 50 pa. Here is what a reading on the blower door looks like.

Holtkamp heating a c inc. If your home is 2000. The test requires a few parameters be set to yield accurate results. 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.

The blower door test. Blower door test results can determine the airtightness of the building and can be presented in a number of different formats. Don t do the blower door test first. Understanding blower door test results.

Simply put a blower door is a diagnostic tool used to measure how much air infiltration air leakage occurs in a house. Once he is done with his walk through your auditor will begin the test. What does the blower door number mean. The auditor will set up his blower door in an outer door facing outward to depressurize your home in most cases.

Cfm50 is the airflow measured in cubic feet per minute from the blower door fan needed to create a change in building pressure of 50 pascals. These are some reasons for establishing the proper building. A good rule of thumb is that your home should have a blower door number less than or equal to its square footage. Last year we built an energy star home for a customer and we used a blower door test to evaluate the houses air infiltration performance.

Jason payne taught me this one several years ago and it makes perfect sense. Higher numbers are worse. Blower door tests are performed by trained and certified energy auditors but a homeowner can conduct a mini test to help pinpoint leaky areas of the home. Our energy saver 101 infographic explains the importance of a blower door test during a home energy audit.

A blower door test is a machine used to calculate airflow between the interior and exterior of a structure measure the airtightness of buildings and identify spots where air is leaking through a building envelope. Air flow at 50 pascals is the preferred value for blower door testing the amount of airflow measured in cubic feet per minute cfm for a. It s a linear scale so 2000 is twice as bad as 1000.