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  1. #1
    Join Date
    Oct 2012
    Location
    Toronto, Canada
    Posts
    2
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    What is Mod-con?

    Bald Loonie, What do you mean by "Mod Con"

  2. #2
    Join Date
    Jan 2009
    Location
    Keokuk, IA
    Posts
    5,520
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    "Mod Con" is a Modulating Condensing Boiler. Modulating means that it has a vairable fire rate. Meaning they reduce their output ot more closely match the capacity required to maintain water temp. Condenseing means that it's a high efficiency design that is 90%+ efficient. Above 85% effciency, flue gases from combustion will start to condense (think white vapor comming out a cold car tailpipe in winter). You need a different heat exchanger material when this occurs because the condensate is acidic and will destroy a cast iron heat exchanger. However, once you reach 90%+ efficiency, you can vent the flue gaes out of PVC pipe, which gives you flexibility in the installation.

  3. #3
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    26,371
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