Total Duct Leakage Test

Total leakage measured with a pressure differential of 0 1 inch w g.

Total duct leakage test.

A suggested method is as follows. The most secure digital platform to get legally binding electronically signed documents in just a few seconds. The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests. Verification can take place via either a post construction test or a rough in test for the post construction test leakage measurement must be made across the entire system including the manufacturer s air handler enclosure with all register boots taped or sealed at a test pressure of 0 1 inches w g.

Fill out securely sign print or email your duct leakage test report tra green instantly with signnow. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow. Figure 5 1l from the 2012 smacna hvac air duct leakage test manual shows the allowable leakage as a function of duct leakage classification and static pressure in the duct. Both the 2009 and 2012 iecc require duct tightness to be verified.

In the previous page on the basic duct leakage testing procedure we said that you pressurize the duct system and measure the airflow through the fan. However when a total allowable leakage is expressed as a percent of total flow it is somewhat more cumbersome to prorate the allowable leakage to any single test segment. Ducts shall be pressure tested to determine air leakage by either of the following. Leakage class can be calculated using equation 3 but needs to be specified if duct air leakage tests are required.

The duct leakage to the outdoors test measures only duct leakage outside of the home s air barrier i e leakage to the outdoors for example into an unconditioned attic or crawlspace. Us duct leakage testing ri trequirements smacna duct class 1 2 inwg 3 inwg 4 6 10 inwg seal class cb a sli t transverse joints seams sealing applicable ransverse joints only asvese joints and seams jo s sea s and all wall penetrations leakage class c l cfm leakage per 100 ft2 1 in h 2 o rectangular. Duct leakage test report. Start a free trial now to save yourself time and money.

Total leakage measured with a pressure differential of 0 1 inch w g. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating ventilating and air conditioning hvac ductwork. 25 pa across the system including manufacturer s air handler enclosure all registers taped or otherwise sealed post construction test. To find the total duct leakage that s basically all you do.