Wondering about how energy efficient your new boiler will really be? The good thing about most boilers these days is that they’re sold at around % efficiency give or take a couple of percentage points in fact, if you have a really old, inefficient boiler, a new one could save you up to £! We can supply and fit all types of. Are you up for the b&m challenge? Amber - we advise uncomplicated preventative maintenance to stop a trivial problem becoming a more expensive.