What Is A Good Blower Door Test Result

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.

What is a good blower door test result.

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. Understanding blower door test results. It s a linear scale so 2000 is twice as bad as 1000. He will systematically move about your home setting up the house for the test.

Here are some things to know. Blower door test results are standardized for an air pressure difference of 50 pa. The test requires a few parameters be set to yield accurate results. A blower door is a machine used to measure the airtightness of buildings.

Simply put a blower door is a diagnostic tool used to measure how much air infiltration air leakage occurs in a house. 1 a calibrated variable speed fan capable of inducing a range of airflows sufficient to. Blower door test results can determine the airtightness of the building and can be presented in a number of different formats. Better consistency and reproducibility occur at higher pressures.

You ll receive a report at the end of the test that will let you see how airtight your home is. 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. There are three primary components to a blower door. The blower door test.

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. A good rule of thumb is that your home should have a blower door number less than or equal to its square footage. This tells you how often the air in your house would be entirely replaced if the fan ran nonstop. 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.

Once he is done with his walk through your auditor will begin the test. What does the blower door number mean. In the report you ll see a reading for the ach an acronym that stands for air changes per hour. The following will help you conduct your.

A blower door test is used on buildings in order to quantify the amount of air leakage through its enclosure. What is a good blower door test result. If your home is 2000 square feet a blower door number of 2000 cfm50 is decent. The auditor will set up his blower door in an outer door facing outward to depressurize your home in most cases.