I will be looking for wall hung, condensing, good efficiency. Not Combi,
for a 4 bedroom house. vented fully pumped system.

.....are you a member of the flat earth society as well?

Dr Drivel
Can i ask what makes you say that? Are you saying you would rather have a
Combi?
I will consider all options. (but not warm air, however good they are now).
What are the advantages of a Combi? I guess space as a hot water tank is not
required, but what are the others?
Regards, Will