Variable Speed Circulators

Discussion in 'HVAC Heating & Cooling' started by JoeR, Feb 23, 2013.

  1. JoeR

    JoeR New Member

    Messages:
    2
    Location:
    Caledon, ON
    I have a buderus mod/con boiler with 4 zones and one single speed coiculator.
    How would a continous running variable speed circulator work on this system particularly if no zone is calling for heat. What happens to the speed?
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