At some stage I will need to replace this boiler , any suggestions what would be a good choice in terms of size, efficiency, reliability, similar hot water flows etc … and what energy efficiency savings could be achieved in changing to a new boiler now ? The boiler does supply two bathrooms a kitchen 18 radiators in a detached dormer bungalow as well as under floor heating to the lounge and kitchen, but to be honest we dont use the underfloor these days if at all . Any suggestions really appreciated