Rebuilding New Orleans
Holy Cross Project
Holy Cross Project Blog
July 2009: Duct Blaster Test
A duct blaster combines a small fan and a pressure gauge to pressurize a house’s duct system and accurately measure air leakage of the ductwork. This test is similiar to a pressure test of a plumbing system. Duct leakage can increase heating and cooling costs over 30% and contribute to comfort, health and safety problems. With the Duct Blaster fan fastened to the HVAC's return air register, the house's duct system is depressurized by 25 pascals. We determined that we met the Energy Star standards with a result of 11 CFM25 leakage to outside.
-- Mike Lopez
