On Tue, 14 Nov 2006 05:44:23 -0800, David Sims wrote:

Ian Stirling wrote:

David Sims wrote:
Ok thanks for the replies (too much to quote)

House has solid walls, good insulation in loft 200mm

The external walls measure roughly 1000 sqm

Are you sure about this?

I am not having a good day

You are correct to be sceptical the correct figure is about 400 sqm

Once you have the required output then you can make a sensible choice.
Getting the starting data correct is useful.

--
Ed Sirett - Property maintainer and registered gas fitter.
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