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Eternal Replacement

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Alan (California Radiant) Forbes
Alan (California Radiant) Forbes Member Posts: 4,002
in THE MAIN WALL
This Eternal water heater just died. It does both radiant heating via a Taco X-Pump Block and DHW and I'm looking for a replacement.

Rinnai has an RL75 water heater, but the warranty is void on a closed loop system. Any suggestions?


8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

Two btu per sq ft for degree difference for a slab

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  • kcopp
    kcopp Member Posts: 4,432
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    I presume this is exterior mounted?
    Can you use a regular combi boiler and build a bit of an enclosure around it to protect from weather?
    I like the IBC Superflow/ DC boiler
  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,002
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    @kcopp Yes, exterior.

    IBC boiler: Reduced DHW production (3.2 gph for the IBC, 4.3 gph for the Rinnai), removing the X-Pump Block HX to install a 1°-2° piping system, 10 year warranty.

    Rinnai water heater: Better DHW production, plug-and-play, no warranty.

    The choice is .....................mine.
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
  • kcopp
    kcopp Member Posts: 4,432
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    @Alan(CaliforniaRadiant)Forbes The SFC199 will give you 5.0 gpm. same heat out put as the SFC 125... no need for the x-block.
    Alan (California Radiant) Forbes
  • Solid_Fuel_Man
    Solid_Fuel_Man Member Posts: 2,646
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    Ahhhhhh, California....where they put the boiler on the outside of the building. Crazy place over there......
    Serving Northern Maine HVAC & Controls. I burn wood, it smells good!

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