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1915 fintube type convector sizing

H2Otech Member Posts: 1
I'm trying to figure out how many BTU'S this convector might be. Anyone have any ideas? It's 4' long X 7" wide X 4" thick roughly. It was covered in sheet metal because it was recessed under bench seating to help convect the air through it in the ballroom. Thank you


  • Jamie Hall
    Jamie Hall Member Posts: 23,554
    I think I'm seeing multiple small diameter tubes connected by rather shallow fins? You can get an approximation -- but only that -- by adding up the surface area of the tubes and the effective area of the fins (count both sides, but subtract for the area taken out by the tubing). A bit tedious, but will get you in the general vicinity.

    Now for BTU rating, if this was hot water, you need to determine the water temperature and from that the effective BTU per square foot.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
    EBEBRATT-Ed Member Posts: 15,764

    Measure the convector and find something close in size to yours. Pipe size, fin height, width, length etc.

    Look at Vulcan radiation, Sterling etc. Tunstall Associates Chicopee, MA would be a good source.

    Find something close in size and it will be close enough
  • DanHolohan
    DanHolohan Member, Moderator, Administrator Posts: 16,553
    Trane invented the convector in 1923. Where are you getting the 1915 date from?
    Retired and loving it.
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    I posted pics of the ones at 30th street train station in Philadelphia, built between 1929-1933. Loaded with so much crud I’d bet they could save 50% in their energy use if they cleaned them.

    There was an error rendering this rich post.