Atmos do a boiler compatable with a 50mm mupvc twin flue
http://www.atmos.uk.com/[/QUOTE]
I've also seen suggestions for Wiessman.
Both Atmos and Wiessman are brands I'm not familiar with - what are people's thoughts on them - are they good/bad/indifferent for reliability cheap/expensive/so-so on price ? I'm guessing they aren't all that common, does that mean I'm likely to struggle finding someone local who can service them ? I'll be asking the people who currently service the system for their thoughts - but I'm always wary that people tend to stick with what they know and slag off anything unfamiliar.
Both manufacturers mention MuPVC as a flue option, but give no information whatsoever (eg design rules). Anyway, I've fired off an email to both of them asking for information.
On flues, I understand the whole length must be accessible for inspection. At one point mine will need to pop up through the 'ceiling' above the carport before turning to go horizontally over the top of the RSJ holding the back wall up. Presumably all I need do is provide a small hatch to shine a torch up through and check the joint is still intact ?
Keston are worse than you have heard truly a stack of steaming (well usally not steaming when i see em as they broken) poop.
So that's not an endorsement then