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Indirect Water Heaters

Eric
Eric Member Posts: 95
in THE MAIN WALL
What is the lowest boiler water supply temperature you guys are using for Indirects? Or is everyone using hot water priority and increasing boiler temperature to 180F.

Does anyone know what manufacturers of indirect are recommending?

Please do not argue use or non-use of indirects.

Application is commericial building with two 2,000 MBH boilers which are currently operating with OSA reset down to 150 Supply temp. Currently no priority.

Comments

  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    I have....

    always used the ramp up to 180F. Most of the htg. season you are always below design so in order to not run out of hot water you you would have to have a very large tank to satisfy the useage. Recovery might be a problem otherwise. kpc
  • hot_rod
    hot_rod Member Posts: 23,399
    depends

    on the rate of exchange you can live with. Check with the tank manufacture for rates at that input temperature.

    Certainly it could be done at 150 but not quickly.

    hot rod
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream
This discussion has been closed.

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