Hvac Air Duct Leakage Test

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.

Hvac air duct leakage test.

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. For duct leakage testing the standard pressure used is 25 pascals which is close to the operating pressure of a typical duct system. 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. Leakage class can be calculated using equation 3 but needs to be specified if duct air leakage tests are required.

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. 1972 2 nd edition 2012 122 pages. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating ventilating and air conditioning hvac ductwork. The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests.

This means that when we measure say 120 cubic feet per minute of duct leakage at 25. 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.