Need help sizing a circulation /hydronic pump. Please help!?

Mar 22

Have 75,000 btu boiler, cast iron, with 1" supply and return. Using with a 79 gallon indirect, hot water heater /storage tank. Co. says flow rate for coil is 5gpm . They do not list pressure loss at coil. I am using 1" heat pex for supply and return to HWH. About 12′. What circulator should I use, please? Such as what size, series, Taco,Grundfos, Wilo ? Thanks!………………….

For such a light duty any half HP hot water centrifugal pump should work.

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2 Responses to “Need help sizing a circulation /hydronic pump. Please help!?”

  1. A.V.R., on March 22nd, 2010 at 2:51 pm Said:

    For such a light duty any half HP hot water centrifugal pump should work.
    References :

  2. johnhassay, on March 22nd, 2010 at 3:11 pm Said:

    i agree, 1/2 hp should do fine, i run a tiny 1/8 hp for my solar/woodstove heated rig, as long as it’s moving. blead it well, good luck
    References :

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