In article , Jim Alexander
wrote:
Hmmm. Preparing for "compulsory" replacement condensing boilers
in May 2005 (two jags bombshell No2) had a holiday project
trying to find some hard data on this. Failed miserably. Any
links to actual data over the full operating temperature
ranges?

Does the graph on http://www.keston.co.uk/products/celsius25.htm help?

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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