On 26/10/2009 11:44 The Natural Philosopher wrote:

Should be less than a third.

Good news and, thinking about it, I've spent quite a lot on insulation
over the years: the house had no double glazing or cavity wall
insulation and had just 25mm of loft insulation when built so would have
needed fairly chunky radiators to cope with the heat loss.

I'd say you are about right.

I'll get the smaller (and cheaper) radiators ordered then.

Looks like a toss-up between OnPlumb and HeatAndPlumb, though OnPlumb
are cheaper with their free delivery for orders over £50 (ex-VAT).

Unless someone knows cheaper...

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F