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# Steam sq ft, if not listed on steam boiler

Member Posts: 56
edited March 2022
Is there a way to determine the steam sq. ft. of a steam boiler if it's not listed on the plate/sticker (by using other numbers listed)?
(I wrote down everything that was listed.)

• Member Posts: 5,701
BTU can be converted. Send a pic of the panel?
NJ Steam Homeowner. See my sight glass boiler videos: https://bit.ly/3sZW1el
• Member Posts: 56
@ethicalpaul
The boiler is gone (didn't take pic.) I wrote everything down, though.
Input BTU per hr.: 112,500
Heating capacity BTU/hr.: 90,000

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Are you looking at a Boiler or a Steamer ?
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@pecmsg
It was a natural gas-fired steam boiler.
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Is this the same boiler from your other thread that you listed as rated for 321 sq ft?
2014 Weil Mclain EG-40
Boiler pictures updated 2/21/15
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p. 78 of Lost Art:

EDR/4 = Lb/Hr

BTU/Hr/960 = Lb/Hr

EDR/4 = BTU/HR/960

EDR = 4 * (BTU/HR/960) = BTU/HR/240

90,000/240 = 375 EDR

My math teacher always made me show my work.
• Member Posts: 56
@KC_Jones
It's the OLD boiler that I'm trying to figure out sq ft of steam.
(The NEW one is 321 sq. ft. steam.)
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BirchLeaf said:

@ethicalpaul
The boiler is gone (didn't take pic.) I wrote everything down, though.
Input BTU per hr.: 112,500
Heating capacity BTU/hr.: 90,000

If this is a Utica, Columbia or one of the Dunkirk boilers that might have any one of several names, it's 281 to 292 square feet.
All Steamed Up, Inc.
Towson, MD, USA
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Consulting
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With the 90,000 that would be with pick up factor, so the actual rating would have been what Steamhead said @281 sq ft

90,000=375 EDR
375/1.33=281
2014 Weil Mclain EG-40