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KCAKCA Member Posts: 284
Hi Guys...

   Who has a T-Stat that goes below 50degF?   Even 40degF maybe...



  • Dave HDave H Member Posts: 240
    Setpoint Controller

    You can use the tekmar 150 setpoint controller. Use the slab sensor not in the slab, but in a wall box or such. Setpoint Operation: -40 to 239+F

    Dave H.
    Dave H
  • hot rodhot rod Member Posts: 6,478
    edited May 2013

    the old A3030101 if it is still around. Nice for garages 38-98F freeze protection 38-39F I think you can set a high and low limit also.
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • cattledogcattledog Member Posts: 60
    Tekmar 150

    Good call Dave. I use a Tekmar 150 and with a set point of 34 F to control a heater which keeps a greenhouse just above freezing. I have the slab sensor hanging in the air among some plants.
  • Dave HDave H Member Posts: 240
    Setpoint Controller

    I have also used this in car wash "ice prevention" projects. Its not for snowmelt (you wouldn't get your car washed when snowing!!) But the water dripping off the cars can freeze the entrance ramp.

    Dave H.
    Dave H
  • Jamie HallJamie Hall Member Posts: 6,029
    There used to be

    a version of the good old Honeywell T87 which went down that far.  Don't know if it's still available...

    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.

    Hoffman Equipped System (all original except boiler), Weil-McClain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • KCAKCA Member Posts: 284
    Thank you

    All for the information...  They all are available and I'll order one..

  • ZmanZman Member Posts: 3,170

    The other nice thing about the uponor is that you can lock out the high and low. Perfect for places where people meddle with t-stats.

    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
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