Blower Door Test Results Forum

What does the blower door number mean.

Blower door test results forum.

Here is what a reading on the blower door looks like. Here are some things to know. Understanding blower door test results. Changing to the cfm50 sq.

Adjust for temperature using charts not required if delta t less than 30f. 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. It s a linear scale so 2000 is twice as bad as 1000. 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.

The blower door test. Higher numbers are worse. Better consistency and reproducibility. A good rule of thumb is that your home should have a blower door number less than or equal to its square footage.

This test ensures a certain level of energy performance and is often used when a project team is aiming for a performance based building standard like passive house which requires a blower door test result of less than 0 6 air changes per hour at 50 pascals of pressure ach 50. 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. I conduct blower door testing in northern minnesota which has had testing as part of the code since 2015. The following will help you conduct your.

Testing done at the higher end of the range between 40 and 60 pa generally produces the most accurate results. Blower door test results are standardized for an air pressure difference of 50 pa. Blower door values testing can be done for pressure differences ranging between 10 and 60 pa. 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.

If your home is 2000. 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. Now for us would create confusion among some builders.