I am considering replacing my existing Vaillant thermocompact (non-condensing) system boiler principally because it is now 16 yr old. It’s currently part of an indirect, unvented, Y plan set- up comprising a vented indirect hot water cylinder ( in the airing cupboard) and a cold water tank ( minus expansion/header tank) in the loft. I also had to connect a separate external expansion tank a couple of years ago when the internal one failed. The original header/expansion tank was removed from the loft together with the pump when it was installed to replace the original fit Potterton Netaheat.
My question is should I just replace it with another system boiler or, recognising that I still have a cold water tank in the loft could I replace it (and at lower cost ?) with a normal boiler and external pump?
My question is should I just replace it with another system boiler or, recognising that I still have a cold water tank in the loft could I replace it (and at lower cost ?) with a normal boiler and external pump?