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Radiant and suplemental heat - controls

The guys are right on with the two stage stat however, that is not always as easy as it sounds.The easiest way is to get an appropriate relay and control the B/B heater via the 2nd stage. You can then remove the existing stat for the B/B.
My suggestion would be to go one step further and use a stat like a H/W Visionpro with an optional outdoor sensor that you could not only stage the B/B but lock it out at warmer outdoor temps allowing the radiant to stay on longer.

Comments

  • Steve Garson_2
    Steve Garson_2 Member Posts: 708
    Radiant and supplemental heat - controls

    I have radiant heat in a room with a 15 foot high north facing wall. On the coldest days, i.e. 15* of lower, the room needs the supplemental baseboard heat, which is on a separate T-stat. When the baseboard is on, the room temp rises and shuts off the radiant, so I set the radiant to a high temp that it could never reach on its own, with the baseboard set at the desired temp. But then when the weather warms up, the room overheats (of course).

    What is the correct way to control this room so that the radiant keeps running on these very cold days?

    Steve
    Steve from Denver, CO
  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    a 2 stage t-stat...

    you set it so that after a period of time(min) that the second stage kicks on...kpc

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  • I use the

    I use the Bradburn 2 stage thermostat. No complaints from customers. Easy to set up and nice readout from stat.
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928
    Dueling Thermostats

    Is the radiant electric or hydronic?

    What about the baseboard?
  • Weezbo
    Weezbo Member Posts: 6,232
    depending on how the system is zoned...

    heat will go to cold through the thermal mass to adjacent rooms...i have my way of saying this, Siggy has a term

    " Inter-zone heat transfer" which is probably just as simple to understand.

    the easiest way to think the problem basically requires slaving the baseboard to the radiant...a hydronic solution would be my first choice .

  • steven e. heat
    steven e. heat Member Posts: 10
    sup. heat

    does the radiant heat have outdoor reset?
  • Steve Garson_2
    Steve Garson_2 Member Posts: 708


    The radiant is hydronic and the baseboard is electric. I'm fine with installing a relay to handle the 220V for the electric.

    So will a 2-stage t-stat keep the radiant circulating even if the baseboard raises the temp above the setpoint?
    Steve from Denver, CO
  • derek_11
    derek_11 Member Posts: 2
    infloor heat question

    can someone help me out with regards to infloor heat....installed an electric boiler....everything is powered up....thermostat on and calls for heat....2 elements of 4 have come on.....i feel the warmth on the supply side of the manifold and into the floor loops.....but nothing coming back on the return yet....i turned up the temp controller to about 110 f,,,,,but still the 3rd element has yet to come on and i have also turned up the stat.......any ideas...am i missing a step....???
  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928


    Yes, you can keep the radiant circulating while the baseboard tops off the heat.
  • derek_11
    derek_11 Member Posts: 2
    infloor heat question

    can u help me out....?
  • Weezbo
    Weezbo Member Posts: 6,232
    Derek,if you post your very own topic ,

    you would likely get more help with it or at least the replies you would get wont be misconstrued to be entangled with the replies from another problem.
    for instance if someone said decrease the flow rate and supply temps the original "owner" of this thread might think it was addressed to his need, and while it might help him a bit it isn't really going to open his thinking to how to fix his problem.
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