What Is A Good Blower Door Test Result

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.

What is a good blower door test result.

What is a good blower door test result. You ll receive a report at the end of the test that will let you see how airtight your home is. The auditor will set up his blower door in an outer door facing outward to depressurize your home in most cases. Understanding blower door test results.

The test requires a few parameters be set to yield accurate results. Simply put a blower door is a diagnostic tool used to measure how much air infiltration air leakage occurs in a house. 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. A blower door test is used on buildings in order to quantify the amount of air leakage through its enclosure.

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. A good rule of thumb is that your home should have a blower door number less than or equal to its square footage. Once he is done with his walk through your auditor will begin the test. The following will help you conduct your.

Here are some things to know. This tells you how often the air in your house would be entirely replaced if the fan ran nonstop. Blower door test results can determine the airtightness of the building and can be presented in a number of different formats. The blower door test.

If your home is 2000 square feet a blower door number of 2000 cfm50 is decent. In the report you ll see a reading for the ach an acronym that stands for air changes per hour. 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. 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.

What does the blower door number mean. Blower door test results are standardized for an air pressure difference of 50 pa. Better consistency and reproducibility occur at higher pressures. Higher numbers are worse.

A blower door is a machine used to measure the airtightness of buildings. He will systematically move about your home setting up the house for the test. There are three primary components to a blower door. 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.