What size Heat Pump?
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  1. #1
    Join Date
    Jan 2002
    Posts
    10
    I'm checking up on my contractor so I want to make sure the heat pump is proper tonage.
    My home is 2060sq ft. It is two story with dual pump/air handlers. I don't know the tonage on the pump but the air handlers are 2 ton units. The pumps are Trane XE-1000's and the air handlers are Trane TWG025A's(2 ton according to Trane's website).

    Your help is appreciated.

  2. #2
    Join Date
    May 2000
    Location
    Monmouth Junction-NJ-USA
    Posts
    5,994
    Get the model #s of the outdoor units. If he is putting in two 2 ton units it sounds oversized. Do a load calculation and you will know what the requirement is.
    If you really know how it works, you have an execellent chance of fixin' er up!

    Tomorrow is promised to no one...

  3. #3
    Join Date
    Jun 2001
    Location
    New Jersey
    Posts
    1,565
    Try http://www.HVAC-Calc.com for residential systems. Using the square footage method can get you in trouble. It is worth the $39.00

  4. #4
    Join Date
    Jan 2002
    Posts
    10
    I'll get the model# and post tonight. I don't know how to do a load calculation.

  5. #5
    Join Date
    May 2000
    Location
    Monmouth Junction-NJ-USA
    Posts
    5,994

    Thumbs up

    You get the Hvac-Calc program which is self explanatory and you will know how to do a load calc. It is really easy and worth the effort. A lot of HO's from this forum have done it.
    If you really know how it works, you have an execellent chance of fixin' er up!

    Tomorrow is promised to no one...

  6. #6
    Join Date
    Jan 2002
    Posts
    10
    I was hopeing someone could help me without my spending $40 right now. I'm a bit tight with other expenses now.

  7. #7
    Join Date
    May 2000
    Location
    Monmouth Junction-NJ-USA
    Posts
    5,994
    $40.00 is certainly cheap insurance for the type of investment you are making. A mistake can cost you thousands down the road, not to mention the discomfort.
    If you really know how it works, you have an execellent chance of fixin' er up!

    Tomorrow is promised to no one...

  8. #8
    Originally posted by rayr
    $40.00 is certainly cheap insurance for the type of investment you are making. A mistake can cost you thousands down the road, not to mention the discomfort.
    As a homeowner with no tech. experience, I totally agree with rayr, and recommend you suck up the $39. I did, and honestly, it was a snap. I actually compared notes with the load calcs that 2 contractors had done and found that it was right in the ballpark (mine was actually off a bit because I didn't measure a couple of things correctly). But, in the end, I understood exactly why the contractors were recommending the size units they were recommending. Turns out that my upstairs system was oversized and there were at least 2 guys who simply said "Oh, you have a 2 1/2 ton unit now, so we'll need a 2 1/2 ton unit to replace it" when, in fact, my upstairs needed just a shade over 1 1/2 tons. Saved me some $$$.

    So, IMHO, forgo your morning coffee and paper for a couple of weeks if you have to. $39 could save you thousands.

  9. #9
    Join Date
    Jun 2001
    Location
    New Jersey
    Posts
    1,565

    Angry

    I may be getting out of line here, but leedesert, I believe you will try to give your contractor a hard time. I smell something fishy here.
    $39.00 is not a lot of money to pay to get the results needed for your home.
    HVAC is a big investment for your home. You want cheap, you are going to get cheap.
    I personally believe you want to see if you are getting ripped off. I can understand that if that is your thought. Did you get referrals from friends or relatives about an HVAC contractor? If you did let him do his job. You'll be back on this forum crying later.

  10. #10
    Join Date
    Apr 2001
    Posts
    621
    Originally posted by leedesert
    I was hopeing someone could help me without my spending $40 right now. I'm a bit tight with other expenses now.
    You can't accurately size hvac equipment in a discussion forum and there is no sq footage "rule of thumb" that sizes correctly either.

    If you're too cheap to spend 40 bucks for a load calc, save it now, but you'll spend a lot more than that on the oversized equipment you'll get stuck with in your install. You'll also pay for it every month in higher utility bills and shorter equipment life from short-cycling compressors.


  11. #11
    Join Date
    Sep 2001
    Location
    richmond,va.
    Posts
    152

    Cool WHY CHANCE IT

    A load calculation needs to be done. That is the only way of knowing what your house needs. HVAC-CALC. is the only way to go. Is this a new home or existing. Ask the contractor for the load calculation for your house. Thirty nine dollars is a small price to pay for peace of mind.

  12. #12
    Join Date
    Jan 2002
    Posts
    10
    Thank you for your suggestions but to be quite honest, there are people out there willing to help someone without making someone spend $40 on a program he will use once. I was hopeing to find people like that here.

    I just checked up on my pumps and they are each 2 ton unit (24,000 BTUH).

    My downstairs is 1250sq ft and upstairs is 810sq ft.

    If anyone can tell me if this sounds about right for the units they installed please reply, I appreciate any comments that help.

    I may be getting out of line here, but leedesert, I believe you will try to give your contractor a hard time.
    You're right, you're out of line. I just want to make sure the most used appliance in my house is done right. I have about 1 more week to check on these items and I just don't have $40 to spend.

    I have noticed that this sites sole advertiser is HVAC Calc. Very interesting.

    If someone can offer advise besides "buy the program" I'll appreciate it.

  13. #13
    Join Date
    Aug 2000
    Location
    St. Petersburg, Fla. U.S.A .
    Posts
    35
    Hi leedesert - Yep, sounds like the right size to me. 2 tons is exactly what you need.

    Glad we could be of help.

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