IMM wrote:


The Isar is a condensing boiler, which in some cases cannot be fitted
where flats are concerned.

Why do you say that? Just because of the flue plume?


I was wondering about that, I understood from browsing around the
condensing bowlers exhaust out steam. I thought a pipe could be run up
the side of the building, like the soil pipe.

I think what I may do is get a few people in like British Gas etc and see
what they say. The problem is my exsisting traditional bowler is very
small (and old), and is positioned right near the toilet - anything to
thick would stop you standing up the do the biz ;-)