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    niko1115's Avatar
    niko1115 Posts: 1, Reputation: 1
    New Member
     
    #1

    Oct 29, 2009, 01:48 PM
    Air vents
    Why should air vents not be installed on the return piping side
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Oct 29, 2009, 04:34 PM
    Actually air vents can be installed on a return air duct and at least one large one is needed for proper furnace operation. Vents can mean different things depending upon how the wording is used. Usually a vent is called a discharge air vent when installed on the supply but a intake air vent can be installed on the return also. Usually if many return vents are used a central air filter is installed at the furnace to be sure all dirty air is filtered before entering the furnace.

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