Duct Leakage Test

The basic idea behind using a duct leakage tester to test for duct leakage is.

Duct leakage test.

Verification can take place via either a post construction test or a rough in test. Ducts shall be pressure tested to determine air leakage by either of the following. Measure the airflow through the fan with the duct system at pressure. 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.

Use a calibrated fan to pressurize the duct system. Total leakage measured with a pressure differential of 0 1 inch w g. Leakage test procedures shall follow the outlines and classifications in the smacna hvac duct leakage test manual. 25 pa across the system including.

If specimen fails to meet allotted leakage level the contractor shall modify to bring it into compliance and shall retest it until acceptable leakage is demonstrated. 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. Total leakage measured with a pressure differential of 0 1 inch w g. 1 blower with speed control vfd to generate range of pressure flowrange of pressure flow 2 flow measuring devices flow grid flow station high flow flow grid flow station high flow orifice plate low flow.

Earning the infiltration and duct leakage idl certification is a simple comprehensive and affordable way for builders remodelers hvac insulation and other contractors to gain the skills needed to offer duct leakage and blower door tests in compliance with iecc codes for new home construction or existing home remodels.