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300MBH Boiler

Buderus 215...made to handle the shock and they have great contorls, too....

Comments

  • Chuck_17
    Chuck_17 Member Posts: 143


    Any recommendations or suggestions for a cast iron boiler, nat. draft around 300MBH input, used for a small apartment building with baseboard and unit heaters. I want to used outdoor air temp reset. The main concern is boiler shock. Any boiler of this type/size that is less susceptible than others?
    If they are all the same, what control and piping things should I not forget
  • Maine Ken
    Maine Ken Member Posts: 531


    First thing that pops into my head would be multiple boilers. Could save tremendous on fuel and wear & tear.

    Maine Ken

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  • Mike20
    Mike20 Member Posts: 37
    In My home I used a 2 stage thermostat

    Forget about the out door air reset and use a 2 stage thermostat instead. Let stage 1 turn on the circulator pump and stage 2 turn on the burner. This way the boiler always has time to gradually heat up and cool down thus eliminating the thermal shock factor. ( This is only applicable when the boiler is used for heat only not hot water)

    My cast iron boiler has been running this way for years with no problems.

    NOTE:
    If you are replacing the boiler you should consider a high efficiency – fully condensing design for fuel economy. The Munchkin boiler has a cool feature for added efficiency of a modulating fire. You should look into it before making the final call on this new boiler.
    MG



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  • vtheat
    vtheat Member Posts: 8
    viessmann vitola

    viessmann vitola 200 can handle very low return and offers a wide range of control options
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