"gna03633" wrote in message
06...

I was just thinking about replacing our boiler, but we live in a small
flat
where space is a premium. I have a very small traditional boiler, but I
realise the smallest combi will be bigger.

In theory some of the pre-mix radiant burners with spiral tube heat
excahgers could go in on their sides. The auto air vent would have to be
re-positioned. In practice. NO!

Look at the Worcester Bosch Junior. That is very small. Look at the size.