I have an old Potterton Netaheta which is working fine.
I was wondering when I run the central heating should I have the hot water on at the same time? Is there going to be an additional cost to do this? I was wondering when the boiler is on there is only one flame so I might as well have the water on at the same time as the boiler is on for the central heating.
I hope what I'm asking makes sense!?