In an earlier contribution to this discussion,
sm_jamieson wrote:

I have a rad in bathroom, 700mm wide, 600 high, 50mm deep. It has 26
water channels running vertically approx 15mm wide and 10mm deep,
spaced at 10mm, It has 40mm fins on the back, and the whole thing is
in a kind of open metal box with slots on the top.
Any idea what BTU this would be ?
I'm looking at replacements like towel radiators etc, but dont want
less heating capacity than I have.
Thanks,
Simon.

As others have said, find a similarly sized single finned radiator in a
maker's catalogue, and note the heating capacity.

But be aware that a towel radiator of the same physical size will provide
but a fraction of this rad's heating output - about 1/3 if you're lucky - so
you'll need a *massive* towel rad to get the current output level.

When comparing radiator specs in catalogues, make sure that they all use the
same delta-T - 'cos they might not - and adjust the figures as necessary.
--
Cheers,
Roger
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