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Pictorial: Cast Iron Radiator Sizing Charts, BTU Output

Posted: Mon. Feb. 04, 2008 6:27 pm
by stoker-man
These charts are self-explanatory. By viewing your radiators from the front, side, and bottom, you can determine the square footage of each radiator to determine the output of each radiator. Many types are shown. These are the best available copies.

Re: Pictorial: Cast Iron Radiator Sizing Charts, BTU Output

Posted: Sun. Jan. 19, 2014 2:18 pm
by PatT15
Stoker-man,
At what temperature are you saying that the sq. ft. of radiation equals 150btu?

Re: Pictorial: Cast Iron Radiator Sizing Charts, BTU Output

Posted: Sun. Jan. 19, 2014 3:02 pm
by stoker-man
I'm guessing 212, but the man who gave me these is long retired and I don't know.

Re: Pictorial: Cast Iron Radiator Sizing Charts, BTU Output

Posted: Sun. Jan. 19, 2014 3:16 pm
by lsayre
More like 170 degrees per this web link:

http://s1043.photobucket.com/user/TheAgent24/medi ... t.jpg.html

If you size them for at least 35 BTU's per Sq-Ft of floor space per room, you should be fine. Don't forget to add in hallways and closets and any other spaces that will not have radiators.

Re: Pictorial: Cast Iron Radiator Sizing Charts, BTU Output

Posted: Sun. Jan. 19, 2014 3:17 pm
by Hambden Bob
Any way you slice it,you've greatly helped us Hydronic Neophytes,Stokes! I thank you ! :up:

Re: Pictorial: Cast Iron Radiator Sizing Charts, BTU Output

Posted: Sun. Jan. 19, 2014 3:28 pm
by lsayre
If the water is leaving the boiler at 180 degrees and returning to the boiler at 160 degrees, then on average it is passing through the radiators at 170 degrees.

Re: Pictorial: Cast Iron Radiator Sizing Charts, BTU Output

Posted: Sun. Jan. 19, 2014 6:30 pm
by mozz
Somewhere on the web there is another version of these charts, many pictures of different styles of radiators. With the steam , EFM 520, was rated for 520 sq ft steam, AA130 were rated at 540.

Re: Pictorial: Cast Iron Radiator Sizing Charts, BTU Output

Posted: Sun. Jan. 19, 2014 6:44 pm
by PatT15
Thanks for all the answers guys! :)