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Mpj Member Posts: 109
I'm looking at boiler replacement job with a total house load of about 75,000 BTU's. I'm thinking about a mod-con with a buffer tank. The house has 6 existing zone and a 80 gallon indirect, the zones are kinda small and only doing a couple rooms each. They have a interior bathroom that has a radiant floor which is about 1,200 BTU's.

How would you guys pipe in this radiant zone? Mixing valve? I series valve? something else?



  • Rich_49
    Rich_49 Member Posts: 2,766
    Is this

    bathroom it's own zone with a dedicated thermostat or an individual loop off of a manifold ?   
    You didn't get what you didn't pay for and it will never be what you thought it would .
    Langans Plumbing & Heating LLC
    Serving most of New Jersey, Eastern Pa .
    Consultation, Design & Installation anywhere
    Rich McGrath 732-581-3833
  • Mpj
    Mpj Member Posts: 109

    Yes, the bathroom is its own zone. It currently have a three way mixing valve off the boiler. It has a t87 thermostat controlling the circulator. 
  • SWEI
    SWEI Member Posts: 7,356
    Total houe load

    Is that a calculated heat loss?  Why so many zones?  Might be an opportunity to simplify things...
  • Mpj
    Mpj Member Posts: 109

    Yes, that is the total house load. He want to keep almost every room on its own zone.
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