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mod/con with indirect or on demand water heater

radmix
radmix Member Posts: 194
in THE MAIN WALL
Which is more efficient a Mod/Con With a side arm or a on demand water heater. My guess is the water heater with the condensing boiler.

Comments

  • kcopp
    kcopp Member Posts: 4,524
    A well insulated...

    Indirect would be my choice. The combustion Eff. numbers will also be  a bit higher w/ the mod/con. Furthermore I am not a huge fan of having a boiler sit idle in the non heating season. kpc
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