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Thread: Boiler insulation

  1. #1
    DIY Junior Member rrcur's Avatar
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    Dec 2011
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    Question Boiler insulation

    Probably a dumb question, but do people ever add additional insulation to their boilers? I know people wrap hot water heaters. My basement gets pretty cold in the winter.

    My small Dunkirk Empire II cast iron oil boiler appears to have a few inches of fiberglass batt inside the sheet metal housing. I'm wondering if I could save fuel by adding additional layers of insulation to the outside of the housing. Rigid foams are probably a bad idea because of flamibilty and smoke generation, but compressed fiberglass or mineral wool with a non-combustible extrerior finished surface might be a possibility.

    I don't see any air intake louvers on the housing. Is there a risk starving the boiler of air?

    Is this a stupid idea?

    What about just bunging up any holes on the housing? I feel heat loss at these locations.

    Any thoughts on this?

  2. #2
    Master Hot Water Mpls,MN BadgerBoilerMN's Avatar
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    Minneapolis
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    Default

    There are safe and simple and effective ways to save on your heating bills, this is not one of them.

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