Results 1 to 4 of 4

Hybrid View

  1. #1
    Join Date
    Aug 2007
    Location
    Sudbury, Ontario, Canada
    Posts
    20

    Use of a low-loss header ?

    There's a lot of articles about low-loss headers. What I can't figure out is whether or not a low-loss header has a place in a small single zone residential hydronic mod/con boiler heating system ? Seems that an installer can optimize the flow through the boiler, but requires a second circulator for controlling flow through heating zone. Seems like a considerable added expense, hence I'd like to know if there's any gains to be made in a small single zone heating system. My heating system has a large thermal mass with cast iron radiators and large gravity feed pipes.

  2. #2
    Join Date
    Nov 2011
    Location
    Long Island, NY
    Posts
    280

    You can always

    build your own. Not as pretty, probably not as functional as a true LLH, but certainly less expensive. It's still primary secondary either way you look at it and there is no getting around the additional circulator.
    Attached Images Attached Images  

  3. #3
    Join Date
    Aug 2007
    Location
    Sudbury, Ontario, Canada
    Posts
    20
    Thank you, very nice setup

  4. #4
    Join Date
    Oct 2009
    Location
    God's country - Shenandoah Valley, VA
    Posts
    339

    It Depends

    If the boiler manufacturer requires hydraulic separation because it has a high head heat exchanger (like a Gianonni), then you have to use a LLH or p/s piping.

    If the boiler has a low head heat exchanger (like T.T., Lochinvar WHN, etc.), then you can probably get by using one circ if you do your calculations right. Follow the manufacturers instructions. The two that I mentioned show scenarios using one circ.
    Bob Boan


    ​You can choose to do what you want, but you cannot choose the consequences.

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