Hvac Air Duct Leakage Test

1972 2 nd edition 2012 122 pages.

Hvac air duct leakage test.

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. Hvac air duct leakage test manual order no. Leakage class can be calculated using equation 3 but needs to be specified if duct air leakage tests are required.

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

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. The hvac air duct leakage test manual provides practical and detailed procedures for conducting leakage tests. Potential accuracy of flow measurements should be evaluated.