Results 1 to 4 of 4

Thread: temperture

  1. #1
    Join Date
    Feb 2005
    Post Likes
    What is the standard for temp. difference between supply and return air?
    How good can it be?

  2. #2
    Join Date
    Feb 2004
    Post Likes
    heating or cooling?

    cooling 15-20 deg.

    heating, whatever the data plate states for a heat rise, shoot for the middle of that range.

    if a heat pump as opposed to fossil fuel, then, as a "rule of thumb" which doesn't mean much, in the heat mode without any aux heat running, at 32 deg o.a., the split should be around 20 deg. for every 3 deg. higher, add 1 deg of split temps.

    i.e. 35*=21 split.
    29*=19 split.

    this is not a perfect example, but only a reference.

    good luck

  3. #3
    Join Date
    Mar 2005
    Post Likes
    a good temp. is 15 to 20. Why because if it goes to 25 to 30 the evap. coils will start to get frozen.

  4. #4
    Join Date
    Jan 2004
    Post Likes
    Is your heat pump, in the heat or cool mode?
    In heat it will vary by the ouotdoor temp.
    Contractor locator map


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

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.