In article , Rhys
wrote:
I absolutely agree with you - there's no way I'm installing the
boiler. Sorry if I gave you that opinion. I'm just looking for
advice on whether it's possible to use the existing chimney.

If this is the route the flue needs to go then look at the Keston
Celsius (www.keston.co.uk) as this uses 50mm muPVC plastic waste pipe
for its air inlet and flue - much much cheaper than using numerous flue
extension pipes. If you did decide on this boiler make sure that your
installer knows that he must use muPVC waste not the somewhat cheaper
ordinary uPVC.

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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