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Sizing Radiator for Bathroom

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Kjmass1
Kjmass1 Member Posts: 294
in Strictly Steam
Hypothetically speaking, should a radiator's BTU output match the room size exactly? My bathroom has a 6 section, roughly 20" high radiator 2 column...EDR of about 2800 BTUs I think.



This site: <a href="http://www.calculator.net/btu-calculator.html">http://www.calculator.net/btu-calculator.html</a> puts my bathroom 5x8x8 at needing 7500 BTUs.



I am expanding the bathroom a little bit so the radiator will be a little undersized. In practice should the radiator closely match? Bathroom was previously uninsulated, and now it will be.
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