Page 2 of 2 FirstFirst 12
Results 14 to 15 of 15
  1. #14
    Join Date
    Sep 2006
    Post Likes
    I have tested it at 500 fpm and the pressure drop is 0.26"wg.

    Your point is the pressure drop increases as the velocity increases. Which is correct. However, the ratio of the difference between the pressure drop of different filters remains approximately the same. In other words the speed would be higher and the pressure drop would be proportionately higher for his fiberglass filter and the 4" MERV 12 filter as well.

  2. #15
    Join Date
    Jan 2004
    Post Likes
    I'm not sysing his 4" now makes everything ok.
    Just that it does have a lower starting drop. It could load up fast enough that he has to change it 4 times a year.

    Those 600's load up in a week on many systems, and could have caused much of his excess fuel use.
    Contractor locator map


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

Page 2 of 2 FirstFirst 12

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.