Hello
I've got a gas boiler thats been in the house at least 20 years - maybe longer. Does this mean its almost certain to be "inefficient" and wasteful or is there a chance its ok? I don't want to spend a load of money changing it if I don't need to! How can I tell?
Does anyone know what the approximate cost is for replacing a gas boiler? I'm guessing at about £2,000 - is this about right? Any help/ experience appreciated ;-)

