Results 1 to 4 of 4

Thread: Regarding: HX's

  1. #1
    Join Date
    Aug 2008
    Post Likes

    Regarding: HX's

    Some questions from someone woefully ignorant

    1) Do clamshell HX's any better/worse than tube HX's?

    2) Would stainless steel HX's be advantageous over aluminized steel and worth any extra costs incurred

    3) Can anyone comment on the lifespans of said types of HX's

    once again

  2. #2
    Join Date
    Nov 2003
    Post Likes
    I have seen nothing that would indicate that either style of HX would outperforn the other for heat transfer. Tubular heat exchanger will often times allow for a smaller cabinet size though.

    Tubular heat exchangers should be more durable compared to a clamshell heat exchanger using like materials due to the way that stesses are distributed through their structures.

    Stainless steel is a much more durable material than aluminized steel but doesn't transfer heat as well. This requires a larger heat exchanger in return and also a larger cabinet. One manufacturer overcomes this by copper cladding their stainless heat exchangers.


  3. #3
    Join Date
    Aug 2008
    Post Likes
    Thread Starter


    good info
    'preciate it

  4. #4
    Join Date
    May 2000
    Indianapolis, IN, USA
    Post Likes
    The only issue we've had with clamshell is setting the furnace directly on the coil box on a downflow application. The top of the A coil can sometimes block airflow through the center of the heat exchanger. We've had a few cases where we've had to add a spacer to get better flow through the center where the limit is located.

    I would say we've found almost no problems with anyone's residential tubular HX vs the crimped clamshell type of either metal.

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.