A return duct is a duct that draws air out of your home back to the air handler or package unit. If your air filter is inside your home, the duct that is attached to the grill where your filter is held is a return duct.
A return duct is a duct that draws air out of your home back to the air handler or package unit. If your air filter is inside your home, the duct that is attached to the grill where your filter is held is a return duct.
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