Blower Door Test Formation

The higher outside air pressure then flows in through all unsealed cracks and openings.

Blower door test formation.

There are three primary components to a blower door. Air leakage at 50 pascals cfm50 cfm50 is the airflow in cubic feet per minute from the blower door fan needed to create a change in building pressure of 50 pascals 0 2 inches of water column. A blower door is a powerful fan that mounts into the frame of an exterior door. The 20mph wind is equivalent to 50 pascals pa of pressure difference.

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. 1 a calibrated variable speed fan capable of inducing a range of airflows sufficient to. The blower door test simulates wind blowing against a building at 20 miles per hour in which case the total volume of air within the house would be exchanged with outside air 7 times. These are some of the blower door test common air leaks we have noted during our testing of homes.

Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. Understanding blower door test results. The following will help you conduct your. A blower door fan simulates these conditions during a test.

You can use it to 1 find air infiltration leaks into your house 2 trace your progress in sealing the house 3 estimate your infiltration flow at 50 pa a blower door standard and compare it to other homes 4 estimate your heat loss due to infiltration and 5 estimate fuel saving and co2 reduction from air. Whether you are performing a blower door test as part of the iecc prescriptive path requirements or part of a hers rating or just for knowledge as part of an energy audit work with a professional experienced testing company. Test results and sample test forms basic airtightness test results airtightness test results can be presented in a number of standardized formats. Simply put a blower door is a diagnostic tool used to measure how much air infiltration air leakage occurs in a house.

The auditors may use a smoke pencil to detect air leaks. The fan pulls air out of the house lowering the air pressure inside. We ll also get to find out what the major inf. A blower door is a machine used to measure the airtightness of buildings.

These pages describes how to build a pretty good blower door for about 30.