In article , Mike Barnard
wrote:
I'm looking at ordering a new combi on monday, but the maker offers
two flue pack options, a four inch and a five inch. Can anyone tell
me why there is a difference and which would be the better option to
choose? And maybe why?

Haven't checked the tech info myself, but at a guess the 5" allows a
longer total flue length.

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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