Results 1 to 8 of 8
  1. #1
    Join Date
    Apr 2004
    Posts
    82

    up size air handler

    any heard of installing a 2.5 ton compressor with a 3 ton air handler? why would someone do that instead of matching the 2.5 ton compresor with a 2.5 air handler. won't the cfm's be to high with the 3 ton handler, 1200 instead of 1000.

  2. #2
    Join Date
    Nov 2008
    Location
    Chapel Hill, NC
    Posts
    1,070
    The CFM is usually adjustable (from ~600 to ~1200 in a 3 ton AH). The coil should be matched, though.

  3. #3
    Join Date
    Mar 2005
    Location
    Houston, Texas
    Posts
    11,874
    Quote Originally Posted by fishin View Post
    any heard of installing a 2.5 ton compressor with a 3 ton air handler? why would someone do that instead of matching the 2.5 ton compresor with a 2.5 air handler. won't the cfm's be to high with the 3 ton handler, 1200 instead of 1000.
    I've seen it done both ways. And both ways work. If you know what the end results you want are

  4. #4
    Join Date
    Jun 2006
    Location
    Omaha, Nebraska
    Posts
    861
    Fellow techs have said they will sometimes use a larger evap coil because it gives more surface area for condensation. I have never decided to try it. If there were an issue then I'd be SOL with the warranty.

  5. #5
    Join Date
    May 2009
    Location
    So Cal
    Posts
    37
    You will also see this in some of the AHRI numbers to increase the efficiencies to meet the Tax Credit standards.

  6. #6
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,328
    Its how some manufacturers get their SEER rating.

    Common practice. Nothing wrong with it.
    Contractor locator map

    How-to-apply-for-Professional

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

  7. #7
    Join Date
    May 2007
    Location
    DC Metro Area (MD)
    Posts
    3,371
    Quote Originally Posted by man from trane View Post
    If there were an issue then I'd be SOL with the warranty.
    Not if it's an acceptable match, as it often is. For example Carrier's 25HCB336A003 is an approved match with the FX4CNF036000 and FX4CNF042000.

  8. #8
    Join Date
    Jun 2006
    Location
    Omaha, Nebraska
    Posts
    861
    Quote Originally Posted by RyanHughes View Post
    Not if it's an acceptable match, as it often is. For example Carrier's 25HCB336A003 is an approved match with the FX4CNF036000 and FX4CNF042000.
    That's good to know. Thanks!

    With all the hacks where I live, I usually see the opposite- 5 Ton condensing unit on a 4 Ton evap. Not efficient, but it works.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event