Hvac Air Duct Leakage Test

Leakage class can be calculated using equation 3 but needs to be specified if duct air leakage tests are required.

Hvac air duct leakage test.

For duct leakage testing the standard pressure used is 25 pascals which is close to the operating pressure of a typical duct system. 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. This means that when we measure say 120 cubic feet per minute of duct leakage at 25. 1972 2 nd edition 2012 122 pages.

The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests. Potential accuracy of flow measurements should be evaluated. So once you ve measured the amount of air moving through the fan you ve quantified the duct leakage at the test pressure. Hvac air duct leakage test manual order no.

Contains updates to the expected leakage rates for ductwork constructed to the smacna hvac duct construction standards metal flexible duct leakage test procedures recommendations on use of leakage testing types. Apparent differences of about ten percent between fan delivery and sum of airflow measurements at terminals do not necessarily mean poor sealing and excess leakage. This american national standard ansi smacna 016 2012 covers revised leakage criteria and builds on the proven methods for testing ductwork for air leaks from the first edition.