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    The value of a desuperheater for a tankless water heater

    I just had a new geothermal system installed and a tankless water heater a few months earlier. I opted out of the desuperheater feature and now I'm wondering if that was a good idea.

    Is it cost effective to buy a desuperheater and attach it to my tankless water heater? I was assuming I'd run the water line to the furnace, then to a 40 gal storage tank and then to the tankless water heater? If it's a good idea, Can a home owner buy one directly?

    - ClimateMaster Tranquility 27 (w/aux elec heat)
    - Honeywell IAQ thermostat (w/outisde temp sensor)
    - Rinnai tankless natural gas water heater

    - Pittsburgh PA
    - 2000 sqft living space
    - Total building supply CFM 1850
    Last edited by beenthere; 08-30-2009 at 03:50 PM. Reason: Removed price question

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