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Indirect water heating with Vitodens 200

Robert O'Connor_3
Robert O'Connor_3 Member Posts: 272
in THE MAIN WALL
My HVAC calcs show that I my house requires 72MBH (heat loss of 66MBH) and I am leaning towards a Vitodens 6-24 which has an input of 91MBH and output of 81MBH.

I am planning on having the boiler feed an indirect water heater (either vitocell or some other good brand) of around 40 to 60 gallons. Is the output of the boiler enough to handle the indirect tank? Even if less than ideal, would it still perform better than a similar sized stand-alone gas water heater tank?

Comments

  • Mike T., Swampeast MO
    Mike T., Swampeast MO Member Posts: 6,928


    I used a 6-24 in a house with HVAC-Calc loss of 82MBH. Gravity conversion and no adjustment for distribution losses is the basement.

    With outdoor temp about 10° below the design temp, maximum sustained input of the boiler was about 75% of capacity--and only at that level for an hour or so.

    Boiler doesn't provide DHW currently, but don't believe it would have a problem. Only time I can imagine it being taxed is with setback recovery and high DHW demand and very cold weather.
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