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Adding radiant heat to existing steam system

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Bob Gagnon plumbing and heating
Bob Gagnon plumbing and heating Member Posts: 1,373
in THE MAIN WALL
injectin pumping with cont. circ. bob
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  • Dave Payette
    Dave Payette Member Posts: 2
    Adding radiant heat to existing steam system

    I own a 100 year old house with a one-pipe steam system and large cast iron radiators. My hot water is heated off the boiler and stored in Thermo 40 gallon tank. We are about to add a 2 story, 1000 sf addition, and I would like to put in-floor radiant heating. Can I use my existing boiler/water heater or do I need a separate system for the addition? I really want to do whatever makes the most sense.
  • [Deleted User]
    [Deleted User] Posts: 75
    it depends on the size of three things,

    1) the steam load
    2)the new addition hot water heat load
    3)the boiler size

    check here for more info...

    http://www.heatinghelp.com/newsletter.cfm?Id=29

    Noel
  • Bob Gagnon plumbing and heating
    Bob Gagnon plumbing and heating Member Posts: 1,373
    tankless heater

    i ran a large addation off a steam boiler using a 3/4" tankless and it worked great. bob
    To learn more about this professional, click here to visit their ad in Find A Contractor.
  • Dave Payette
    Dave Payette Member Posts: 2


    The water running through the system is usually only 80-90 degrees or so. Did you need some sort of heat exchanger or mixing system to bring the temperature down?
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