Thanks for the responses, it's appreciated.
I would have been helpful if Atmos published some efficiency figures for boilers in the same way cars quote things like 'miles per gallon', else how can you compare them?
Is it enough to state how much heat can be generated without saying how...
I'll try to answer as best I can:
Programmer - TP7000
Stats - sorry don't know
Motorised valves etc etc? - sorry don't know but I guess so.
property is detached - 4 bed
insulated cavity walls - yes
sheltered location -yes
Double-glazed - yes (A rating)
EPC B
Do you have baths or...
Yeah I know how long is a piece of string.... I have a Atmos Multi 24/80 about 5 years old and it's been regularly serviced last time by British Gas (who seemed pretty competent).
I have no complaints it heats up water and the central heating fine, but the gas bill seems rather high, on...