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  1. #1
    brianmiller's Avatar
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    Default Styrofoam blocks supporting furnace

    Split system HVAC system.

    The furnace was in the attic on its side....it was rated for horizontal installation...however, the furnace , evaporator coil, and supply/return plenums were supported with styrofoam blocks rather than metal straps.

    So , I'm thinking:

    a) the styrofoam blocks do not provide the proper support for the system.

    b) the sytrofoam blocks are combustible material , which are in contact with the furnace cabinets.

    Are these defects?

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  2. #2
    brianmiller's Avatar
    brianmiller Guest

    Default Re: Styrofoam blocks supporting furnace

    any thoughts on this subject?

    bm


  3. #3
    Daniel Leung's Avatar
    Daniel Leung Guest

    Default Re: Styrofoam blocks supporting furnace

    That is a HVAC or furnace? or have both in the attic? Do you have brand name and model number? Please clarify and attach photos.


  4. #4
    Join Date
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    Ormond Beach, Florida
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    Default Re: Styrofoam blocks supporting furnace

    Quote Originally Posted by brianmiller View Post
    So , I'm thinking:

    a) the styrofoam blocks do not provide the proper support for the system.
    I agree.

    b) the sytrofoam blocks are combustible material , which are in contact with the furnace cabinets.
    That would depend on the required clearances to combustible material, which might not be a problem with electric strip heaters only.

    Are these defects?
    Yes, in my opinion, as the foam blocks are not intended to be used for that use, the foam can deteriorate over time, condensation can form between the foam and cabinet rusting it out, etc.

    The one good thing about the foam blocks, though, may be that when the condensate line backs and overflows into the improperly installed secondary condensate line and overflows into the auxiliary drain pan, those "flotation devices" may help float the AHU float up and away from the rising flood waters.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  5. #5
    brianmiller's Avatar
    brianmiller Guest

    Default Re: Styrofoam blocks supporting furnace

    the gas-fired furnace and the evaporator coil are in the attic. the condensor/compressor is out side.

    Do not the majority of manufacturers require a minimum of one inch clearance from the cabinet?

    Sorry no pics...

    bm


  6. #6
    Join Date
    Mar 2007
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    Ormond Beach, Florida
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    Default Re: Styrofoam blocks supporting furnace

    Quote Originally Posted by brianmiller View Post
    the gas-fired furnace and the evaporator coil are in the attic. the condensor/compressor is out side.

    Do not the majority of manufacturers require a minimum of one inch clearance from the cabinet?

    Depends on if horizontal or vertical, and the clearance above is greater than the clearance beside and below as I recall.

    Also, as I recall, they are not to be supported by combustible materials?

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

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