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  1. #1
    Join Date
    Dec 2011
    Posts
    7

    Carrier System vs. Luxaire System

    Hello, we live in a 1500 sq. ft. house in New Jersey. My HVAC system is about 25 years old, so I am looking to replace it and take advantage of some of the state rebates. I received a few quotes, and narrowed it down to these two:

    Quote 1 - Luxaire System:
    Furnace: TG9S080B12MP11, 95.5%, 80,000BTU
    A/C: TCJD36S41S1 3 Ton, 13 SEER
    Coil: ???

    Quote 2 - Carrier System:
    Furnace: 59SP5A080E17-16 96.5% 80,000 BTU
    A/C:59SP5A080E17-16 3 Ton, 16 SEER
    Coil: CNPVP4821

    How do these two systems compare? I'm leaning towards the Carrier system due to the price, but can't find much information on the A/C unit they are quoting. Any feedback would be appreciated.

  2. #2
    Join Date
    Jan 2008
    Posts
    2,056
    First thing that jumps out at me is over sized for both heating and cooling.
    Did anyone do a manual J?
    "Hey Lama, hey, how about a little something, you know, for the effort." And he says, "there won't be any money, but when you die, on your deathbed, you will receive total consciousness." So I got that goin' for me, which is nice. - Carl Spackler

  3. #3
    Join Date
    Dec 2011
    Posts
    7
    One company did a manual J. The numbers came out to 32379 Btuh for heating and 22921 Btuh for cooling.

    Also, I just realized that I put the wrong part # for the A/C. The correct number is CA16NA036.

  4. #4
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,302
    Sounds like you need 1/2 the furnace and a 2 ton A/C.

  5. #5
    Join Date
    Sep 2002
    Location
    Northeast Ohio
    Posts
    4,843
    I would agree on the sizing. As far as the equipment, I handle Luxaire and Tempstar (ICP part of Carrier Corp) the Carrier is a little higher grade than the Luxaire, both decent equipment. It's more about proper installation than brand, all manufacturer's offer different levels of equipment.
    A good HVAC tech knows how, an educated HVAC tech knows why!

    DEM


  6. #6
    Join Date
    Dec 2011
    Posts
    7
    Thanks for the advice. The only issue that was brought up by the contractor doing the manual J was that my unit is a downflow and all my ducts run in an ventilated crawlspace. I was advised not to insulate the ducts due to the amount of cold water pipes runing in the space. It doesn't look like these losses were taken into account in the J calculation, but would this have an impact on the proper equipment sizing?

  7. #7
    Join Date
    Mar 2006
    Location
    The South
    Posts
    2,213
    Engine

    Ductwork in attic is not insulated?

    And dealer will stand behind installing a 95%+ condensing furnace in attic for a NJ location?

    IMO

  8. #8
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
    Posts
    5,060
    Quote Originally Posted by engine15 View Post
    Thanks for the advice. The only issue that was brought up by the contractor doing the manual J was that my unit is a downflow and all my ducts run in an ventilated crawlspace. I was advised not to insulate the ducts due to the amount of cold water pipes runing in the space. It doesn't look like these losses were taken into account in the J calculation, but would this have an impact on the proper equipment sizing?
    Change the condition of the crawl space, seal and insulate the duct work.

  9. #9
    Join Date
    Sep 2002
    Location
    Northeast Ohio
    Posts
    4,843
    In your climate, I would want the crawl space to be conditioned, what with water lines and such.
    A good HVAC tech knows how, an educated HVAC tech knows why!

    DEM


  10. #10
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
    Quote Originally Posted by BaldLoonie View Post
    Sounds like you need 1/2 the furnace and a 2 ton A/C.

    I agree, I'm not understanding why the furnace was oversized by 2X.... unless for tax credits the needed th 4 ton fan. But you cna get a 4 ton blower on a 60k BTU unit.


    Actually, I'm also having trouble understangin how a home in Jersey that needs 2 tosn fo cooling, only needs 32k BTU of heating? that balance doesn't sound right. In that climate, the heating load should be close to 2X the cooling load.

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