radiant floor heat

System
System Posts: 2,511 admin
in Energy Use & Conservation #1
Hi:

I'm planning on switching to a tankless propane water heater for my radiant floor heating system, and I was wondering if anyone had experience with this. Any recommendations? Brands that are useful or useless? I have an off the grid 12 volt system with an inverter, so running a unit with an electronic ignition is okay.

Thanks!

Coreyumt
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Comments

  • n3qik
    n3qik Solar Expert Posts: 741 ✭✭
    #2
    Re: radiant floor heat

    Make sure it is rated for radiant heating, not all of them are. I am thinking of doing the same thing. I have direct radiant baseboard, I need a temp of 160-180, most will not get that that high. If you are doing PEX indirect floor heat, then I think the temps are lower.

    Here are some that are:
    http://www.takagi-usa.com/
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  • mike95490
    mike95490 Solar Expert Posts: 9,583 ✭✭✭✭✭
    #3
    Re: radiant floor heat

    Solar Shed
    500 gal storage @ 180F
    http://www.builditsolar.com/Projects/SpaceHeating/SolarShed/solarshed.htm
    Powerfab top of pole PV mount | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister ,

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  • Brock
    Brock Solar Expert Posts: 639 ✭✭✭✭
    #4
    Re: radiant floor heat

    The funny thing is when I was looking at tank less heater they are typically less efficient then a good power vented tank. Of course the standby losses are higher for a tank of hot water, but watch those efficiency numbers on the models. I have seen some tank less units in the 70's, not so good.
    3kw solar PV, 4 LiFePO4 100a, xw 6048, Honda eu2000i, iota DLS-54-13, Tesla 3, Leaf, Volt, 4 ton horizontal geothermal, grid tied - Green Bay, WI
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  • halfcrazy
    halfcrazy Solar Expert Posts: 720 ✭✭✭
    #5
    Re: radiant floor heat

    I have used the Rinaai Continuum a couple of times for radiant and both times it has worked great
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