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tankless water heater as a solar water heater backup

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diyguy
diyguy Member Posts: 1
in Domestic Hot Water

Trying to figure out how to use tankless water heater as a backup for Buderus 80 gal indirect water hater with 2 coils Any suggestions. ?

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  • Ironman
    Ironman Member Posts: 7,907

    I’m assuming that the top coil is solar and the bottom connects to a boiler?

    If so, just pipe the tankless in series with the indirect’s hot line going into the tankless’ cold inlet.

    Set the indirect’s aquastat about 10* higher than the tankless.

    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.

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