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knocking radiator

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Kpelfrey
Kpelfrey Member Posts: 1
in Radiant Heating
Hi there, I have radiator heaters in my home and the one in our bedroom (of course) has started making this strange knocking sound. Does anyone have any idea what this is and how to get rid of it? Thanks.

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  • Alan (California Radiant) Forbes
    Alan (California Radiant) Forbes Member Posts: 4,012
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    Knocking

    Do you have steam heating or hot water heating?
    8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour

    Two btu per sq ft for degree difference for a slab
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