My present system has two independent circuits one for the hot water cylinder and the other for the central heating, so there are four pipes coming out of the existing boiler, in the loft there are two tanks and the hot water cylinder.
I have an old oil boiler installed 45 years ago with two pipes going to the hot water cylinder. The other two pipes going to the radiators fed by a pump which is situated next to the boiler.
I have had four quotes to in stall a Worcester Danesmore 18/25 external oil boiler. Two claim that the...