Is it sensible to work out how long it takes to heat your hot water tank? To set your timer.
I'm thinking, how long should it take from cold, to user temperature. I rarely run out of hot water, but the wife set it to come on at 4.30pm and go off at 7.30pm, the boiler clicking on and off throughout this period. If the boiler clicks off, does that mean its hot enough, or does the system build up the temperature in stages? I don't want to waste energy with trial and error, if someone can guide me roughly.