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  1. #1

    Advice on Furnace

    I need advice on selecting a furnace.

    I finished out the loft above my barn for an in-law suite.
    Approx. 500 sq ft (one bed, living room, bath).
    Cathedral ceiling - 2x6 construction (r19 insulation) also same r value in
    floors. I live in connecticut. Looking to heat with
    LP forced air furance, as there is no nat gas in our area
    and looking to keep costs/maint down versus heating oil system.
    Scientific wild assed guess says I only need about 25,000 btus
    for this space. Smallest furnace I can find for inexpensive cost
    is 40k input x 80% afue = 32k output.
    - Is this still oversized?

    - Area will only be used a few months per year (visitng parent), so
    looking to keep costs down.
    - I can get a Dayton single stage furnace or for about $150 more
    I can get a Goodman (Badman?) 2 stage. Thinking about the 2 stg
    since the 40/32,000 btu may be too much for my area, at least a
    2 stg. on the low stg. would keep longer cycles running.

    Any feedback appreciated.
    Also, how bad is a Goodman and how good/bad is a Dayton
    forced air furn? Keep in mind this isn't for my main house, just
    the part-time loft.

  2. #2
    Join Date
    Feb 2006
    Location
    Tn.
    Posts
    1,344
    where do you live ? ill install it! Also Im not too big on eithier of those brands but I guess they'll work in this application.

  3. #3
    Join Date
    Mar 2004
    Location
    Illinois
    Posts
    6,959
    Call a pro, have them do a load calc and give you recommendations.

  4. #4
    Join Date
    Jan 2007
    Location
    in my lumpy chair
    Posts
    1,947
    in some countries they use the heat from farm animals to keep them warm...im not joking

    as far as my in laws? that would be good enough
    I dont warranty Tinkeritus

  5. #5
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    33,889
    Just remember that some Goodman 2 stage won't allow a 2 stage stat. They will time to high after at most 15 minutes. So much for long run periods on low. That's the last furnace you want in an oversized situation!

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