Total Duct Leakage Test

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.

Total duct leakage test.

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. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating ventilating and air conditioning hvac ductwork. The most secure digital platform to get legally binding electronically signed documents in just a few seconds. The total duct leakage test measures how much air leakage there is for all of the ductwork connected to the hvac system including ducts located both.

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. Duct leakage test report. Both the 2009 and 2012 iecc require duct tightness to be verified. Start a free trial now to save yourself time and money.

Total leakage measured with a pressure differential of 0 1 inch w g. Fill out securely sign print or email your duct leakage test report tra green instantly with signnow. Available for pc ios and android. 25 pa across the system including manufacturer s air handler enclosure all registers taped or otherwise sealed post construction test.

The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests. To find the total duct leakage that s basically all you do. Leakage class can be calculated using equation 3 but needs to be specified if duct air leakage tests are required. The only other thing you need to make sure you do is keep the spaces where the ducts are at the same pressure as the outdoors as much as you can anyway.

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. Total leakage measured with a pressure differential of 0 1 inch w g. Ducts shall be pressure tested to determine air leakage by either of the following. 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.