Hvac Air Duct Leakage Test

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.

Hvac air duct leakage test.

1972 2 nd edition 2012 122 pages. 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. Potential accuracy of flow measurements should be evaluated. For duct leakage testing the standard pressure used is 25 pascals which is close to the operating pressure of a typical duct system.

The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests. Hvac air duct leakage test manual order no. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating ventilating and air conditioning hvac ductwork. 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. 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 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.