| The development of the Minneapolis Duct Blaster® has
revolutionized performance testing of forced air distribution systems
for builders, HVAC contractors, and utility DSM programs. The
Minneapolis Duct Blaster is a calibrated air flow measurement system
designed to test and document the air-tightness of forced air duct
systems in both houses and light commercial buildings. The Duct Blaster
fan is connected directly to the duct system in a house, typically at a
central return, or at the air handler cabinet. With the remaining
registers and grilles temporarily taped off, duct air-tightness is
measured by either pressurizing or depressurizing the duct system and
precisely measuring the fan flow and duct pressure. Duct air-tightness
measurements are used to diagnose and demonstrate leakage problems,
estimate efficiency losses from duct leakage, and certify the quality of
duct system installation.
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