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  1. #1
    Join Date
    Oct 2005
    Location
    USA
    Posts
    45
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    Pump or valve zoning on boilers

    I used to always use grundfos 3 speed pumps to zone on high efficient boilers. At the AHR show the rep from Rinnai told me that by using pumps the gpm is to large and inefficient. He said the system pump is plenty and to only use zone valves...Any thoughts or recommendations?

  2. #2
    Join Date
    Jul 2011
    Location
    East coast USA
    Posts
    1,009
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    one pump less cost, one pump fails not heat...i think the cost out weighs the failure

  3. #3
    Join Date
    Jan 2004
    Location
    PA
    Posts
    70,255
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    Quote Originally Posted by dlove View Post
    one pump less cost, one pump fails not heat...i think the cost out weighs the failure
    Not a big difference in cost between circs and zone valves. Using circs, its easier to get the proper GPM for your zones.

    JMO
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