I am looking to renew our CH and DHW system, and have been looking over
the Alpha CB50 condensing storage combi boiler. Would really appreciate
anyones feedback on these boilers, and any alternative suggestions to
them.

Some outline information, we live in a 3/4 bedroom semi detached house,
i say 3/4 because the loft has been converted by the previous owner and
at present is used as a storage room in future we hope to bring it up
to current regulations and use it as a bedroom. CH requirement will be
for 10 rads approx 40,000btus. DHW requirement will be initially for 1
bathroom with thermostatic shower (used twice a morning) and bath (used
once an evening) - would like to be able to add a second en-suite
shower at a later date. Also the usual requirements of a washing
machine.

As an additional query, should i be considering splitting the CH system
into seperate zones? I have read that larger houses require zoning of
the CH system-how large is large?