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  1. #1
    Join Date
    Feb 2005
    Posts
    39

    Question

    Whats everyone opinion if a heatpump is to be installed in Southern IL. 1525 sg ft walk out with conditioned basement.
    What are the advantages of a varible speed indoor fan 1 stage vs. a 2 stage unit or dual fuel.
    Also, Rheem vs. Trane in this situation.
    Can you oversize a 2 stage for heating reasons, with ac on one stage?
    Thanks

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,875
    VS is comfort.

    2 stage is also comfort.

    You can't oversize that much, you'll still need a back heat sourse.
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  3. #3
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,271

    Thumbs up House Details

    Originally posted by help3
    Whats everyone opinion if a heatpump is to be installed in Southern IL.

    1525 sg ft walk out with conditioned basement.

    What are the advantages of a varible speed indoor fan 1 stage vs. a 2 stage unit or dual fuel.
    Also, Rheem vs. Trane in this situation.

    Can you oversize a 2 stage for heating reasons,
    with ac on one stage?
    3-ton, 2-stage might work for 1,525 S.F.
    Is 1,525 S.F. actually the TOTAL area?

    4-Ton would likely be overdoing it and perhaas result in higher relative humidity than you might wish.

    Load Analysis is needed to determine more specific matches.
    4-ton on first stage would 'act more like' a 3 ton.

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    [Edited by dan sw fl on 11-12-2005 at 06:29 PM]
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

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  4. #4
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,040
    In the midwest, 1525 sq ft is 2.5 ton tops. With shade, 2 ton would probably cool the place. 3 ton is unheard of, except maybe with the worst hack. We build our homes better than some areas of the country

    High SEER won't pay around here. Buy it if you want bells & whistles. For comfort, a standard scroll heat pump with variable speed blower will do just fine. If you want better humidity control and the model you choose doesn't have a ramp up mode, put a simple humidistat on it to slow the blower in humid weather.

    Rheem vs Trane is a matter of preference. I don't like a recip in a heat pump, I find a scroll heats better in cold weather. The old Climatuff recip just doesn't put out the toasty warm air like a scroll.

  5. #5
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,271
    Originally posted by BaldLoonie
    In the midwest, 1525 sq ft is 2.5 ton tops.

    For comfort, a standard scroll heat pump with variable speed blower will do just fine.

    ..., I find a scroll heats better in cold weather. The old Climatuff recip just doesn't put out the toasty warm air like a scroll.
    You mean 90'F supply air is
    Toasty Warm Air.
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  6. #6
    Join Date
    Sep 2004
    Location
    Memphis
    Posts
    2,502
    [QUOTE]Originally posted by BaldLoonie
    [B]In the midwest, 1525 sq ft is 2.5 ton tops. With shade, 2 ton would probably cool the place. 3 ton is unheard ofQUOTE]

    In Memphis a house with 1525 sq feet better have a 3 ton. If not, there will be some irate people in July when the temps are hitting 100 plus.
    Life is like a jar of jalapenos. What you do today might burn your ass tomorrow.

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