What temp do people set their thermostats to, for the heating to click on automatically? I see a range here from 18 to 21. I have no idea what's normal! I appreciate it varies a lot from person to person, but I am cold all the time unless it's a heatwave so hoping to get an idea of what most people consider a good balance of cost and comfort.
I've had it on for 45 mins in the mornings a few times, and twice now in the evening