In article , Geoff wrote:
You mean like a Potterton Powermax?

http://www.potterton.co.uk/products/...owermaxHE.html


This page cannot be displayed - see, even the internet has morals

It works from here.

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Tony Bryer SDA UK 'Software to build on' http://www.sda.co.uk
Free SEDBUK boiler database browser http://www.sda.co.uk/qsedbuk.htm