Hvac Air Duct Leakage Test

The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests.

Hvac air 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. 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. 1972 2 nd edition 2012 122 pages.

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. 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. This means that when we measure say 120 cubic feet per minute of duct leakage at 25. Hvac air duct leakage test manual order no.

So once you ve measured the amount of air moving through the fan you ve quantified the duct leakage at the test pressure. 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. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating ventilating and air conditioning hvac ductwork.