Which way for economy?

[StevenDee]

Hi

Please can someone tell me which is the most economical & productive way of running a Boiler Mate A Class OV for my hot water.

There is Constant and timed. If i leave it on constant, is it heating water all day even when unused or just on demand?

Thanks

steve

 

[Agile]

What is the heat source?

 

[oilman]

TURN IT OFF EXCEPT WHEN YOU NEED IT