Blower Door Test Results Forum

Understanding blower door test results.

Blower door test results forum.

Blower door test results are standardized for an air pressure difference of 50 pa. A good rule of thumb is that your home should have a blower door number less than or equal to its square footage. It s a linear scale so 2000 is twice as bad as 1000. 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.

Changing to the cfm50 sq. The following will help you conduct your. I conduct blower door testing in northern minnesota which has had testing as part of the code since 2015. Performing a one point test no software gather data record five 10 second average minimum baseline readings to determine the level of accuracy perform blower door test using the baseline and cfm50 functions.

Simply put a blower door is a diagnostic tool used to measure how much air infiltration air leakage occurs in a house. Higher numbers are worse. Testing done at the higher end of the range between 40 and 60 pa generally produces the most accurate results. The blower door test.

A blower door is mounted in an external door frame hoses are connected to measure the air pressure outside inside and in the fan assembly and a manometer is set up to run the whole test the fan in the door blows air out of the house depressurizing the home to a set standard with the outside. Better consistency and reproducibility. Now for us would create confusion among some builders. Blower door values testing can be done for pressure differences ranging between 10 and 60 pa.

Here are some things to know. 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. Here is what a reading on the blower door looks like. What does the blower door number mean.

Adjust for temperature using charts not required if delta t less than 30f. A blower door test is used on buildings in order to quantify the amount of air leakage through its enclosure. The builders i work with have grown accustom to the ach50 number most have a basic understanding of the test results.