Mills Efficient Home

Duct Efficieny Test & Seal

One often over looked item responsible for efficiency loss is duct work.  Duct work is, of course, responsible for distributing warm or cool air to the various areas of a home, and when ducts are broken or loose your heating and cooling system is forced to work harder to maintain an even temperature.  Much like the blower door test, Mills uses specialized equipment to isolate leaks in ductwork, and then makes the needed repairs.

The equipment:

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 compliance with duct leakage standards such as California’s Title 24 Building Energy Efficiency Standards.

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