"Doctor Drivel" wrote:

It is best you keep quiet as the OP is wanting proper advice, not the
ramblings of DIYers. First port of call in boilers, as of now, is
Intergas. They do not cover all of the rerquirements, but most. Want a
high output combi? Go for the ATAG 51kW. Few match it, few make one with that output.

Actually, that's the first combi that I might be prepared to let through my
front door, IF its construction & quality are up to scratch. The design is
way more sensible than the usual combi design and should in theory make it
much more reliable. (it has two separate heat exchanging coils, one for
CH, one for HW. No diverted valves needed).

Tim