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Air Handler Unit Cleaning
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Blower Assembly, Motor, Blades, and Body After Cleaning
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Main Unit
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Blower Unit Before Cleaning
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Blades Before Cleaning
The typical A/C system circulates air through the duct system using a "squirrel cage" blower fan. The blades of a squirrel-cage fan are cupped in order to cause the spinning cage to move air. Dirt accumulation on the blades fills-in this cupped area, ultimately
changing the "cup" to a simple flat area.
The fan will spin just fine but air-flow will
literally be halved with dirty blades. When
a very dirty fan of this type was cleaned
or replaced, air-flow nearly doubled.