Thanks a lot. I suppose what I really want to know is if lowering the TVR'S affects the output from the boiler and therefore the amount of energy being used. ie is it a way to save money?
Is it correct that the most efficient/cheapest way to use the boiler is to keep the radiator thermostats at full and adjust the temperature on the boiler only. Or to change the thermostats as and when and keep the boiler at a consistant temperature?
