What is a HVAC System Leakage Test?
Is a pressure test where the duct system is tested for air leaks. The Duct Testing fan (Duct Blaster) is first connected to the duct system at the air handler cabinet, or a return grille. After temporarily sealing all remaining registers and grills, the Duct Blaster fan is turned on to force air through all holes and cracks in the ductwork. The fan speed is increased until a standard test pressure is achieved in the duct system. A precise leakage measurement is then made using an airflow and pressure gauge connected to the Duct Blaster system. Estimates of efficiency losses from duct leakage can then be made from the leakage measurements.
