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Two stage thermostat

JOE_99 Member Posts: 15
I have radiant floor heat (domestic H/W) and hot water baseboard(boiler).I'm looking for a thermostat that would work the two heat stages (1st stage would be radiant heat,2 stage the BB H/W).For the second stage,this thermostat will only control the BB HW zone for this floor(separate pump).The thermostat can have air condition setting but will not use it(no central air).Honeywell if I have a choice.Any suggestion.


  • Glenn Harrison_2
    Glenn Harrison_2 Member Posts: 845
    Honeywell Focus Pro 5000 Series

    Specifically the TH5220, which is a digital, non-programable, 2-stage thermostat, that you can go into the installer set-up and make it a 2 stage heating only model.

  • Craig_8
    Craig_8 Member Posts: 33

    any two stage thermostat can do what you want, but a relay needs to be installed in one of the systems to isolate it from the other.
  • two stage

    I've used Branburn two stage thermostat, easy to hook up and set up. Nice readout panel.. Yes, I used the relay panel for entire 5 zones and temps heating system in this sorched air home...
  • David_5
    David_5 Member Posts: 250
    I tried this at my house

    I tried this at my house using radiant as the first stage and a hydroair as the second stage. I didn't like it and changed to two separate thermostats. The temperature differential between stages made the house too cold in colder weather. The radiant is better in cold weather and the hydroair is better in mild weather.

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