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.

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. 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. Ducts shall be pressure tested to determine air leakage by either of the following. 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. 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. The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests. Available for pc ios and android.

Total leakage measured with a pressure differential of 0 1 inch w g. The most secure digital platform to get legally binding electronically signed documents in just a few seconds. To find the total duct leakage that s basically all you do. 25 pa across the system including manufacturer s air handler enclosure all registers taped or otherwise sealed post construction test.

Start a free trial now to save yourself time and money. A suggested method is as follows. Fill out securely sign print or email your duct leakage test report tra green instantly with signnow. Duct leakage test report.

Leakage class can be calculated using equation 3 but needs to be specified if duct air leakage tests are required. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating ventilating and air conditioning hvac ductwork. Total leakage measured with a pressure differential of 0 1 inch w g. 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.