Blower door testing is an essential component of energy audits for property owners who want to achieve an airtight building or one that has a high-performance certification like LEED (Leadership in Energy and Environmental Design). Vent Pros offers reliable, qualified blower door testing services to identify air leakage in your home or business A collection of one thousand construction details organized by climate and house part. Search and download construction details. If the ceiling drywall will be the primary air barrier, then of course the ceiling drywall needs to be installed and taped before the blower-door test can be performed. For more information on these issues, see Blower Blower door test results can determine the airtightness of the building, and can be presented in a number of different formats. CFM50. 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. If the door is left off during the test, the fan will move more air than it would if it had to pull all its air through the return air duct. Therefore, the fan will work harder and the amp draw will be higher than it would be under normal operating conditions. 6. Read the amp draw of the blower motor. Record the reading and compare it to the A blower door test is a diagnostic procedure performed by a certified professional to identify air leakage in a building. The test simulates a 20-mile-per-hour wind blowing on the top, the bottom, and all sides of a home or building. Wherever air can enter through gaps, cracks, or other voids, it will. The blower door test is an important tool A blower door test is simple. They install the fan, spin it up to 50 pascals differential pressure (you use cfm for this unit, which is a volume, not a pressure). 50 pascals will be at a certain RPM. Their fan is calibrated to have a lookup between RPM and CFM. 50 pascals might be like 1200 RPM which in your case is apparently 6000 CFM, which Ideally, the blower door test just confirms that you have already done a good job. 2000sqft home 20--40 hours would get air sealing below 3 ACH. Materials $500 t0 thousands from low tech to PH supplies. Example of simple; caulk plates, boot penetrations, tape Zip sheathing, no chimneys. Perhaps I need to clarify. Using a flow hood. Using a blower door and pressure pan (for diagnostic purposes only) Using a blower door only (not recommended) The basic idea behind using a duct leakage tester to test for duct leakage is: Use a calibrated fan to pressurize the duct system. Measure the airflow through the fan with the duct system at pressure. The Best Way to Pass the Maryland Energy Code Tests. The blower door test and the duct blaster test will reveal whether these measures were properly taken during the construction of the home. 1. Air barrier and thermal barrier. A continuous air barrier/pressure boundary must be installed in the building envelope. av0tt.

how does a blower door test work