Boiler gone down - British Gas

[Dr Murdoch]

Moved in last year, the boiler isn't the newest (20 years old?)and has now given up.

Its a conventional boiler.

On the assumption it is old and might not be fixable, I'm happy to get a replacement coventional boiler as opposed to a combi.

Are British Gas reliable? Too expensive*? Any recommendations? I'm happy to go independent.

• 24months interest free is required as our savings have been drained by other 'life' issues

[Dr Murdoch]

Thanks

Is it better to slightly over power the spec?

A few online quotes suggest 24kW, however I'm minded to go a bit more beefy, say 30 or 35kW. However, I know little about boilers. Is bigger not better?!

Its an old house and feels cold, the previous boiler seemed to be working overtime.