Good BTU calculation

Joined
30 Dec 2009
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Location
Bristol
Country
United Kingdom
I'm just calculating the BTU's for some radiator replacement but noticing massive differences between different formulas.

I first used one from the heatandplumb website which seems a very reputable site but noticed their calculations come in some what lower than others?!?!

I obviously don't want an inadequate rad but don't want something stupidly big either.

Your thoughts appreciated.
 
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if its a tad big you can turn it down

if its to small you are donald ducked :idea:

Indeed but if I can avoid going too big, I'd like to. Just wonder why the formulas are giving such different results.

For a 4 x 3 m room, I getting 1000 BTU's difference?!?!
 
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