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    One Rad hydronic system (13 Posts)

  • Steve Steve @ 8:14 AM
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    One Rad hydronic system

    I need to create a small hot water system one Towel rail .
    I am thinking 2 gallon electric water heater, 9d, PRV, Low water cut off, And smallest circulator I can find.
    Only need to move Less than 1 GPM, less than 10 feet of pipe so Almost no head.
    Has anybody ever done this? Can I get a circulator small enough or do I need to go primary secondary.
    Need to keep this as simple as possible
  • nicholas bonham-carter nicholas bonham-carter @ 10:05 AM
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    Towel rail

    They have electrically heated towell rails in the uk, so maybe they are available here. They are usually 240 volt operation.--NBC
  • Steve Steve @ 10:39 AM
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    It's over a bathtub

    So electric is out
  • SWEI SWEI @ 11:10 AM
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    micro system

    Electro makes a 1.1 kW boiler.  Check out little ecocirc Vario (B&G e3-4) / (Laing E1) for a pump.
  • Steve Steve @ 11:51 AM
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    Will do

  • JohnHenry JohnHenry @ 5:34 PM
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    does it have to be pumped

    or would convection/gravity do the trick?
    The bitterness of poor quality remains long after the sweetness of low price is forgotten.
  • Gordy Gordy @ 6:00 PM
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    That's the way I would try. It will work. Heck my DHW recirc line is gravity 120' round trip.

    How many rails on the towel warmer? That could be a hitch.
    This post was edited by an admin on March 27, 2013 6:02 PM.
  • Paul Pollets Paul Pollets @ 6:05 PM
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    Open connection

    A hydronic towel bar needs to be connected to a closed loop system. It will develop leaks if connected to a water heater, or open system. I'd use an electric towel bar. Runtal makes them, as do others. Maybe you could find another location?
    This post was edited by an admin on March 27, 2013 6:06 PM.
  • Steve Steve @ 6:54 PM
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    I would prefer

    Not to try this one gravity. I know it can work well in some situations.
    Towel rail was already installed when I got there, Have Air and flow tested the pipe work but they are half-inch I cannot see where they go.
    Towel rail is all brass (non ferrous material)
    Leaning toward the Laing E1
    Electric is out
    Anybody know which circulator is the quietest
    Thanks again guys
    This post was edited by an admin on March 27, 2013 6:59 PM.
  • heatpro02920 heatpro02920 @ 7:12 PM
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    I did it a little different...

    I did a towel warmer at my sisters house, kind of unorth. type, I ran it to her DHW recric system, so it was always 120 degrees and it had domestic hot water return in it... I first put it in the supply side but had to repipe it to the return since it was cooling her hot water too much... Just talk the customer into a recric system, put the pump in the basement pipe the 3/8" up from the water heater to the towel warmer and then connect the other side to the hot water line... EZ PZ....

    If you are bent on making it stand alone, I would use an electric tankless with a Grundfos up15-10b5 t {I believe that is it, is 1/2 sweat connections, bronze with a timer...} 003 is even smaller and also comes in 1/2 swt...
    This post was edited by an admin on March 27, 2013 7:16 PM.
  • SWEI SWEI @ 7:17 PM
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    recirc line

    is a great idea - did you use a stainless towel warmer?
  • SWEI SWEI @ 7:16 PM
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    ecocirc is quiet

    So quiet that even with the larger one, I can't tell if they're running except by grabbing them or holding up to my cheek.  Crank down the Vario knob and you'll probably get below 5 Watts. 
  • Steve Steve @ 8:37 PM
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    Thanks guys

    I will use the ecocirc
    I have used stainless towel rail before on the recirculating line And it works great.
    But this is an apartment building so standalone is the only option.
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