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HELP WITH SLANT FIN 30 BASEBOARD HEATING

stuman
stuman Member, Email Confirmation Posts: 21
in Radiant Heating
I'm looking for help to install the proper length of base broad heating in a basement that is mostly in the ground.The room is 8 ft. high x 14 ft. wide x 30 ft. long. There is 2 double pane windows 2ft x 2ft and the other 2ft x #ft .I have a Grundfos Alpha2 pump with under 40 ft of 3/4" pex piping. These will be heated using a Combi-boiler.

Comments

  • Zman
    Zman Member Posts: 7,611
    Coincidentally slant fin has a great heat loss calculator you can use to determine the heat loss of the space. With that information, you can size the baseboards.https://www.slantfin.com/slantfin-heat-loss-calculator/
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
    Ironman
  • stuman
    stuman Member, Email Confirmation Posts: 21
    for a diy guy.... this program is requires a lot of info that I just dont have ......thks
  • Zman
    Zman Member Posts: 7,611
    edited November 2021
    If you SWAG it @ 20 BTU/ft you would need 16lf of baseboard.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
  • stuman
    stuman Member, Email Confirmation Posts: 21
    edited November 2021
    thank you for trying to help...."swag it @ 20 BTU/ft"......not a clue
  • Zman
    Zman Member Posts: 7,611
    Scientific Wild **** Guess (Swag) would be guessing that you have a heat loss of 20 BTU's per square foot.
    Baseboard heaters on average put out about 500 BTU's per linear foot.
    Not really the right way to figure it but since you didn't want to figure out the heat loss program it will probably get you close enough.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
    MikeAmann
  • stuman
    stuman Member, Email Confirmation Posts: 21
    Thks again...I did try inputting some measurements and could not get it to work for just that one room.
  • eclecticmn
    eclecticmn Member Posts: 121
    I found this BTU program
    https://www.afsupply.com/btu-calculator

    This is not professional advice but advice to seek out professional advice. If all other heat sources are slant fins then you might be OK. If mixing them with cast iron you may not be OK. I had that situation and they never got warm for unknown reasons. No, they were not air locked. I ripped out the slant fins and am awaiting some used cast iron radiators.
    Home owner near Minneapolis with cast iron radiators, one non working slant fin now ripped out, and hot water heat.
    Alan (California Radiant) Forbes
  • Zman
    Zman Member Posts: 7,611
    eclecticmn said:

    I found this BTU program
    https://www.afsupply.com/btu-calculator

    This is not professional advice but advice to seek out professional advice. If all other heat sources are slant fins then you might be OK. If mixing them with cast iron you may not be OK. I had that situation and they never got warm for unknown reasons. No, they were not air locked. I ripped out the slant fins and am awaiting some used cast iron radiators.

    This calculator does not ask you the outdoor design temp, how can it give you meaningful information? Your heat loss might be a bit different in Alaska or Hawaii...
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
    Alan (California Radiant) Forbes

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