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domestic water sizing

Walt_6
Walt_6 Member Posts: 5
in THE MAIN WALL
My Bad, yup it's 14.5 GPM: late night.

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  • Walt_6
    Walt_6 Member Posts: 5
    domestic water sizing

    Hey folks, any ideas on supplying domestic hot water with an indirect fired TT water heater, Smart series, where I need 14.5 GPH of hot water at 60psi and it needs to run for about 20 minutes, and only 65K of radiant in the house? Venting is about 30 veritcal feet with quite a few zigs and zags. Would like to use a Knight boiler with the triangle tube indirect. Have also thought of using a 50 to 80 gallon storage tank piped in series w the indirect and use a recirc pump. Any other ideas? Thanks
  • Alan(OnVacationInOregon)Forbes
    Alan(OnVacationInOregon)Forbes Member Posts: 232
    That's

    300 gallons. Forget the indirect, use a "flash" heater; it will have to be a big one.
  • Mark Eatherton
    Mark Eatherton Member Posts: 5,852
    GPH or GPM...

    THere IS a big difference.

    ME

    There was an error rendering this rich post.

  • hot_rod
    hot_rod Member Posts: 22,830
    Temperatures?

    What is the temperature of the water coming into the building? Hot hot do you want to supply? This formula will show you the amount of BTUs required to heat, for example 300 gallons from 55 to 140F.

    300 X 8.33 X (140-55)=
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
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