Oldnproud
Our water heating stays on all the time, as it's a part of the air source heating system that we can't turn on/off independently of the radiator heating. As soon as the temp of the water drops to 46°, it heats up again to around 52°.
Ive been thinking that this is something that we need to take up with the landlord, to see if anything can be done about it. I am absolutely certain that for much of the year, it would be cheaper to boil a kettle for the little hot water that we use, though obviously showering would be difficult.
This coming summer, once we dont need any heating, I will put that to the test by turning the whole system off, and doing exactly that, just boiling a kettle, for our hot water.
I monitor our energy usage carefully, so should quickly see if it makes a difference.
We don’t use our air source heating for the water, instead we put the immersion heater on. Half an hour to an hour overnight (cheap rate) is sufficient for us, when it’s just the two of us having quick showers and using the dishwasher for almost all washing up (cold fill, as is washing machine).