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tankless for radiant

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chaz9842
chaz9842 Member Posts: 1
in Radiant Heating
I have a weil mcclain oil boiler and want to know if i could use the tankless heater for radiant heat approximately 400 sq. ft.

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  • CMadatMe
    CMadatMe Member Posts: 3,086
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    Don't Promote

    I don't condone the use of a water heater as a heat source but if proplerly sized and piped yes you could. Why not just add a zone off the existing boiler?

    There was an error rendering this rich post.

  • Jean-David Beyer
    Jean-David Beyer Member Posts: 2,666
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    I don't condone the use of a water heater as a heat source

    I know where this was done once and it was probably OK. An architect designed a solar heated building in the Pacific northwest. This had collectors on the roof filled with air (no problems with freezeup) that was blown down into a subbasement filled with crushed rocks. He looked at 100 years of data to estimate how much rock was required, and put in 4x that much.



    The building code required backup heating even though his calculations indicated none was required. So he put in an electric hot water heater and baseboard. This was a separate system, not the one that provided domestic hot water. If his calculations are correct, this system never came on except the one time for the inspection.
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