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  1. #1
    Join Date
    Jul 2005
    Posts
    133
    If you are picking a VS handler to get 13 SEER for a design tonnage of 2.5 and the book says that there is
    (1) a TWE031 for nominal tonnage of 1.5-3 T with 31KBTU of cooling
    (2) a TWE037 rated for 2-3.5 with 37KBTU of cooling
    (3) and a TWE040 with nominal tonnage of 2-3.5T with 40KBTU of cooling,
    which one do you choose. I ask because one contractor specified the first and another the third. What goes into making the choice? Thanks

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,876
    The humidity of your area is What should determine which one to use.

    Which would be indicated by a manual j load calc.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  3. #3
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,051
    Assuming a 2A6H2030 outdoor unit, the 31 gives you 29600 total capacity, .75 SHR. The 37 gives 29000 total, .72 SHR which means considerably more latent or humidity removal. The 37 also hits 13 SEER. In the A-S spec sheet, they don't show using the 40 size. I'd use the 37 for the better humidity control personally unless in a really dry climate.

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