| The argument seems to settle on how you store your hot water and how well insulated it is. (I presume you're talking about hot water for washing and not heating.)
IF you regularly use hot water (every day) and your storage is well-lagged, there IS an argument for leaving the boiler ticking over so that the 'core' water temperature is maintained and only requires topping-up. IF your water is poorly lagged or you RARELY need hot water, then switching it off makes sense, but realise that you have to heat the core water from ambient up to useable temperature.
If your hot water is produced by the 'geyser' method (ie not stored, but heated according to demand) then it doesn't make much difference (apart from the fuel required to keep the pilot light lit). |