Arkansas HVACR NewsMagazine February 2018

S tate, National, Chapter News Tech News

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. • The fan speed is increased until a standard test pressure is achieved in the duct system. A precise leakage measurement is then made using the DG-1000 pressure and flow gauge connected to the Duct Blaster fan. • Estimates of efficiency losses from duct leakage can then be made from the leakage measurements.

Better Duct Systems for Home Heating and Cooling “Typical systems with ducts in attics or crawl spaces lose from 25% to 40% of the heating or cooling energy that passes through them. In an era of increasing concern for energy efficiency, this is no longer acceptable.”

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