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  1. #1
    Frank Perry's Avatar
    Frank Perry Guest

    Default Combustion Air Venting on Other Floors

    What are the requirements when venting to adjacent space on another floor? A house has all of their gas appliances in the basement which is considered a confined space and does not meet the 50/1000 criteria. Can they vent to the upstairs living space with a grille on the upstairs door that seperates the basement from the living area? Should it be two grilles (one high - one low) or does that not apply since it's not on the same floor? The codes do not specifically state instructions when the adjacent space is on another floor.

    Any help is appreciated. Thx.

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  2. #2
    Join Date
    Mar 2007
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    Connecticut
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    Default Re: Combustion Air Venting on Other Floors

    I think you are talking about combustion air, correct? Venting would be exhaust gases. You want to install what is called fan in a can
    FIELD CONTROLS, LLC - CONTRACTOR PRODUCTS Combustion Air Systems


  3. #3
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    May 2007
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    Frankfort, KY
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    Default Re: Combustion Air Venting on Other Floors

    Quote Originally Posted by wayne soper View Post
    I think you are talking about combustion air, correct? Venting would be exhaust gases. You want to install what is called fan in a can
    FIELD CONTROLS, LLC - CONTRACTOR PRODUCTS Combustion Air Systems
    Great suggestion Wayne!

    If you start cutting holes from the basement area to the upper floor areas you could actually make an appliance that was operating safe turn unsafe very quickly.

    Remember it's only a hole, it doesn't know which way the air should move.

    Measured Performance more than just a buzzword

  4. #4
    Frank Perry's Avatar
    Frank Perry Guest

    Default Re: Combustion Air Venting on Other Floors

    Yes, it's to supply combustion air not venting. The fan in the can is interesting.

    So if you could make an appliance that was operating safe turn unsafe very quickly by making holes to the upstairs then why wouldn't that be the case with holes going to the outside?


  5. #5
    Join Date
    May 2007
    Location
    Frankfort, KY
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    326

    Default Re: Combustion Air Venting on Other Floors

    Quote Originally Posted by Frank Perry View Post
    Yes, it's to supply combustion air not venting. The fan in the can is interesting.

    So if you could make an appliance that was operating safe turn unsafe very quickly by making holes to the upstairs then why wouldn't that be the case with holes going to the outside?
    Holes going to the outside do the exact same thing.

    They can be intakes or exhaust depending on the wind or pressure difference.

    Measured Performance more than just a buzzword

  6. #6
    Join Date
    Mar 2007
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    Near Philly, Pa.
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    1,643

    Talking MUA

    You have two kinds of makeup air (MUA)---
    -the type required by codes
    -the type that works

    They are not the same.

    Keep the fire in the fireplace.

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