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  1. #1
    Join Date
    Oct 2005
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    5
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    I require a furnace with 119,000 btu output which wold be about 140,000 size. Does anyone know who makes this size with variable speed 2 -stage. I currently have a Carrier which works great but they do not go this big.

    Thanks for your help

    London Ontario Canada

    Brian

  2. #2
    Join Date
    Dec 2002
    Location
    Rochester, MN
    Posts
    5,307
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    Has a manual J been done to the home? Must be a large home if you really need something that big!


  3. #3
    Join Date
    Oct 2005
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    5
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    Thread Starter
    It is 4100 sq ft (one floor) plus the full basement.

  4. #4
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,844
    Post Likes
    Lennox G61mpv-60d-135 132,000 input, 122,000 output. 94.6 afue, 2stage v drive

  5. #5
    Join Date
    Oct 2005
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    5
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    Thread Starter
    Would another option be a small boiler with hot water coil in a small Air Handler or would this option be too expensive?

  6. #6
    Join Date
    Jan 2004
    Location
    PA
    Posts
    75,317
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    Is your system zoned?

    Have any improvements been done to the house since the old furnace was installed.

    Has a load calc been done.



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  7. #7
    Join Date
    Oct 2005
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    5
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    Thread Starter
    The home is not zoned.
    It is a brand new home and the footings are now poured only.

    I require 118,000 btu output for heating.

  8. #8
    Join Date
    Feb 2005
    Location
    Toms River, NJ
    Posts
    449
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    Ruud makes a 80% two stage 150,000 btu input. I dont know if they offer an ecm motor for it or not.

    Dave in NJ

  9. #9
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    15,623
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    You plan on heating a 4100 sq ft house with one forced air system with no zoning????

    That sure wouldn't be on my list of desirable ways to heat that size house.

  10. #10
    Join Date
    Jan 2004
    Location
    PA
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    Originally posted by brians
    The home is not zoned.
    It is a brand new home and the footings are now poured only.

    I require 118,000 btu output for heating.
    Then your in luck.

    You don't need a 118,000 output furnace.
    You need 2 furnaces.

    Use 2, 2 stage furnaces with VS blowers.

    What size a/c does your house require.
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  11. #11
    Join Date
    Oct 2005
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    Thread Starter
    House required 3.5 tonne for a/c.

  12. #12
    Join Date
    Apr 2004
    Posts
    7,676
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    First off you cant twin furnaces with VS motors, sorry to say and I am with the others, it simply would not be good application to install one system for this home, even zoned. I mean if you have to twin furnaces to get capacity why not just have 2 systems and allow them to operate independantly. The installer would almost have to have a screw loose to suggest one system for this home.

  13. #13
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    39,117
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    Most brands have 90% with 112 to 115,000 BTU output. OK, so that's just a RCH undersized. So on the coldest morning of the year the temp drops to 68 or 69. Big deal. As pointed out, Rheem has 150K 80% with 120K output if you want 80%.

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