Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

radiant control

Mark_7 Member Posts: 123
Pricing radiant job for slab house, 1 level,se exposed wall is all glass floor to roof. Will be quoting mod/con heater w/ odt. But if we use stats in the 3 zones will that control the rooms comfort or run off of odt.


  • what make is the heater? generally the boiler control (on-board or add-on) will vary the boilers firing/modulation and the stats will control flow to each zone by pump or valve.

    in a perfect system the thermostats would remain continuously on and the odr curve would track the inside temperature.

    this is how i would set up most systems, with the stats not demanding heat but rejecting it. eg: in bedrooms, where you would want a lower temp than say a bath.
  • hot_rod
    hot_rod Member Posts: 22,147
    be aware of the \"all glass\" south east room

    both from a heat load, and a passive gain overheat potential. Crunch your numbers.

    hot rod
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
  • Mark_7
    Mark_7 Member Posts: 123
    radiant control

    HR, house dose sit in trees, but I'm also worried about heat gain.I'm probably going to let the TT run the circ and the heater will most likly be a MC90w/ odt.
This discussion has been closed.