A valuable diagnostic tool to identify areas of concern within an HVAC system's ductwork. Assess the efficiency and performance of the ducts, identify potential energy waste, and ensure proper indoor air quality.
Duct Air Leakage is the leakage of air from the air distribution system ductwork. The leakage can occur at joints, seams, and penetrations. Research shows that air duct leakage can be represented as a function of duct surface area, leakage class, and static pressure. Leakage class is determined by the construction methods employed in duct fabrication in accordance with different duct construction standards.
Duct leakage testing should be performed after all components of the system have been installed, including the air handler, the ductwork, and the register boxes or duct boots. Ductwork can be of different construction and design, and different class systems can require testing at higher or lower pressures.
Leakage class is determined by the construction methods employed in duct fabrication in accordance with the ANSI/SMACNA HVAC Duct Construction Standards.
The standards for Duct Air Leakage Test identify certain leakage limits for ducts and outlines procedures for testing ducts for conformity with air leakage limits that are set forth in a designer’s project specification. Under any circumstances, reasonable allowances for leakage must be adopted because no duct is absolutely airtight.
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