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sean_26 Member Posts: 22
would this boiler be good for radant heat


  • sean_26
    sean_26 Member Posts: 22

    LAARS JVH100N GAS BOILER 100,000BTU DIRECT VENT L/CIRC. has anyone use or work this boiler?is it good,ok or bad?
  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    I have used...

    a number of them w/ good results...especially in low headroom areas...flow piping is critical..

    To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"
  • Paul B._2
    Paul B._2 Member Posts: 62
    JVH boilers and radiant heat

    Hi Tom,

    This model boiler will work well with radiant heat provided you keep a few things in mind while working up your design.

    First, although it is a copper fin tube boiler, the fin tube is rolled into cast iron wet legs that form the sides of the combustion chamber. Oxygen barrier tubing is a must for the radiant zones.

    Second, inlet water temperatures below 120°F will cause it to condense. If your design calls for lower entering water temperatures, you will need either a fixed manual by-pass between the inlet and outlet piping at the boiler, or a thermostatic regulating valve of some type to maintain inlet temperature.

    Third, as mentioned, most of the installation issues encountered with this model are directly related to low flow, which can cause knocking or banging.

    I'd be happy to answer additional questions regarding this boiler. I can be contacted at the factory - 603-335-6300 X 562 between 8:00 and 5:00 Eastern time.

    Sincerely, Paul Bock, Applications Engineer, Laars Heating Systems, Co.
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