Blower Door Test Formation

There are three primary components to a blower door.

Blower door test formation.

Enjoy the videos and music you love upload original content and share it all with friends family and the world on youtube. 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. 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.

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. The fan pulls air out of the house lowering the air pressure inside. Test results and sample test forms basic airtightness test results airtightness test results can be presented in a number of standardized formats. 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.

The auditors may use a smoke pencil to detect air leaks. Understanding blower door test results. 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. The higher outside air pressure then flows in through all unsealed cracks and openings.

These are some of the blower door test common air leaks we have noted during our testing of homes. A blower door is a powerful fan that mounts into the frame of an exterior door. A blower door fan simulates these conditions during a test. A blower door is a machine used to measure the airtightness of buildings.

The second part of this series will pick up with our blower door test from the moment we turn on the manometer. The following will help you conduct your. These pages describes how to build a pretty good blower door for about 30. The 20mph wind is equivalent to 50 pascals pa of pressure difference.

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.