Furnace air intake inside a mechanical closet
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  1. #1
    Join Date
    Dec 2012
    Posts
    62

    Furnace air intake inside a mechanical closet

    Installing a new 60K BTU HE furnace in a utility/mechanical room in a residential home. Has an existing water heater: 50gal @ 40k BTU.
    Room is about 6x6x9 high with closed non-vented door
    Room has 2- 11x17 vents through exterior wall to outside air

    Will there be sufficient air when drawn from inside the room for both the furnace and water heater ?

  2. #2
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
    Posts
    5,058
    Quote Originally Posted by mixer440 View Post
    Installing a new 60K BTU HE furnace in a utility/mechanical room in a residential home. Has an existing water heater: 50gal @ 40k BTU.
    Room is about 6x6x9 high with closed non-vented door
    Room has 2- 11x17 vents through exterior wall to outside air



    Will there be sufficient air when drawn from inside the room for both the furnace and water heater ?
    With the vent openings to the outdoors through horizontal ducts the 11X17=187 square inches

    187 square inches X 2000 btu per square inch =374,000 btu

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