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Steam duct coil

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Jason_13
Jason_13 Member Posts: 304
in Strictly Steam
I was wondering how to determine the capacity of a steam duct coil to determine boiler replacement.

I have a duct coil which measures 12 x 18 2 pass. This is installed in a vapor system which I thought a little unusual. 

The existing boiler is grossly over sized as they have 4 burners blocked off.

Any help would be greatly appreciated.

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  • Steamhead
    Steamhead Member Posts: 16,832
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    If there's no better information

    go by the size of the steam pipe feeding the coil. For example, an 1-1/2" pipe could serve up to 168 square feet. 
    All Steamed Up, Inc.
    Towson, MD, USA
    Steam, Vapor & Hot-Water Heating Specialists
    Oil & Gas Burner Service
    Consulting
  • MikeyB
    MikeyB Member Posts: 696
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    Indirect Heating

    Go to Resources at the top of the page, then click on Tech Stuff, then Hot Tech Tips the click How Indirect Heating Works,
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