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Eternal Replacement

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?

Often wrong, never in doubt.


  • kcopp
    kcopp Member Posts: 3,990
    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
  • @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.
    Often wrong, never in doubt.
  • kcopp
    kcopp Member Posts: 3,990
    @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: 2,449
    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!