Results 1 to 3 of 3
  1. #1
    What experience does anyone have with the loop by pas hepa filters that are added to the return air ducts?

  2. #2
    Join Date
    Apr 2004
    Location
    where you at?
    Posts
    3,359
    what about the remaining 75% air volume that does not by-pass?

    too expensive - both purchase and maintenance (HEPA replacement, power draw, ext.), with little gained.

  3. #3
    Join Date
    Apr 2002
    Posts
    11,808
    Seen the fan powered ones where they draw air 'upstream' from return duct, filter it and blow it back 'downstream' into the return duct closer to the furnace/air handler. They even come with VS motors.

    Expensive, but with the fact that HEPA filters are restrictive to start with and could have a change out pressure drop as high as several inches, the bypass would be the way to go if you wanted that level of filtration.

    If it was like a blind pepsi taste test, I don't think the most hypochondriac (sp?) HO could tell the difference between a HEPA system or a good media air cleaner.
    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

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