Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

knocking radiator

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.


  • Alan (California Radiant) Forbes

    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
This discussion has been closed.