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  1. #1

    13 SEER Vs 15 SEER

    I’m building a new house and the contractor’s original quote is for Carrier units- Down using 13 seer AC (24abbb348) 91% Gas furnace (58MCB080); up using 2 Heat Pumps (25HBB324 and 25HBB318) due to foam insulation. We are in piedmont NC he said the HP would be more efficient and comfort would be fine. The last heat pump I was in the mid-1980’s.

    Contractor has given me 2 options that add about 20% to cost. Downstairs he would go to a Hybrid HP 15 seer and 94% furnace. Didn’t get exact model but he thought 25HCCxx and a 58 MECxx and also going to 15 seer on both HP upstairs. He indicated the warranty went from 5 to 10 years and would go from the “base” model to the “comfort series”

    Is it worth the difference to go to 15 SEER and the Hybrid Heat Pump? Also what kind of payback would be expected? Paying 8.6046 per KWH.

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
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    33,431
    I'd think with those prices dual fuel might be a wise move. Right now natural gas seems to have crept down a bit but not for long.

  3. #3
    Join Date
    Feb 2010
    Location
    Metro Atlanta, GA
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    475
    Dual fuel in NC is definitely a good option. As far as I know all Carrier residential equipment has a ten year parts warranty if the products are registered online.
    Last edited by FlyersFan; 03-14-2010 at 10:18 PM. Reason: added residential

  4. #4
    Join Date
    Aug 2002
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    Office and warehouse in both Crystal River & New Port Richey ,FL
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    18,836
    Quote Originally Posted by FlyersFan View Post
    Dual fuel in NC is definitely a good option. As far as I know all Carrier residential equipment has a ten year parts warranty if the products are registered online.
    Except the Base Model, until they changed it very recently!

  5. #5
    You might as well go up to the 15 seer, they will save you money in the long run. Carrier is nice equipment, comfort series is fine. See how much extra it would be to step up to the performance series.

  6. #6
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    66,833
    Foam insulation. And 7.5 tons of cooling?

    Must be a big house, or he is sizing by rule of thumb.
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  7. #7
    Join Date
    Mar 2010
    Location
    UT
    Posts
    126
    Except the Base Model, until they changed it very recently!


    Its 10 Year on All R-410 as long as it is registered in 90 days

  8. #8

    Been There

    It about 6500 sq ft and i'm over budget in many areas, so i want to make sure i make wise investments.

  9. #9
    Join Date
    Mar 2010
    Location
    New Haven, Indiana
    Posts
    37
    Don't go with the base model. Go Comfort series. Plus, check and see if it's got a variable speed blower on the furnace. I don't deal with Carrier to much so, I just that I'd ask.

  10. #10
    Join Date
    May 2006
    Location
    Arlington, TX
    Posts
    107
    Wow, that's a huuuuge house, and almost 900sf/ton. Outstanding choice on the foam insulation. Having an idea what that will cost you incrementally, you should go with the 15 SEER unit.

  11. #11
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    66,833
    Quote Originally Posted by Tgame View Post
    It about 6500 sq ft and i'm over budget in many areas, so i want to make sure i make wise investments.
    I'd ask to see the load calc.

    Still sounds like a lot of A/C for a spray foam house.

    Lots of standard insulation new homes run 900 sq ft to the ton.

    A wise decision means asking your subs to show you how they determined things.
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  12. #12
    Join Date
    May 2006
    Location
    Arlington, TX
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    107
    Quote Originally Posted by beenthere View Post
    I'd ask to see the load calc.
    Agree, ensuring a load calc was performed is a good plan...

    Quote Originally Posted by beenthere View Post
    Still sounds like a lot of A/C for a spray foam house.

    Lots of standard insulation new homes run 900 sq ft to the ton.
    Seriously? I just finished house-hunting, where I looked at 50 or more houses, nearly all built in the last decade. Not a single one of these came even close to this figure. Most were ~400-450sf/ton. Were most units oversized? Probably. I'm actually thrilled the house I chose is ~615sf/ton. 900sf/ton sounds close for a foam-insulated space.

  13. #13
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    66,833
    Lots of new construction HVAC companies still do the bigger is safer method of sizing.

    And those houses that had 450 sq ft per ton. Probably had duct work for a unit sized at 650 or 700 sq ft per ton.

    So they probably weren't really getting the rated capacity of the A/C.
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