Sleeping with heating on seems a waste of energy to me. At least in Spain. I have a dumb thermostat. It doesn't even have a clock. It just has two buttons, one

Sleeping with heating on seems a waste of energy to me. At least in Spain. I have a dumb thermostat. It doesn't even have a clock. It just has two buttons, one two increase temperature, the other to decrease it. In winter, during the day, I put it at 20C. At night, I put it at 15C or lower (which stops heating, as the house temperature decreases to about 17 or 18 degrees during the night, without heating). It works like a charm. We are not cold at night as we use pyjamas and duvet. We also have a baby. In fact, if I forget to turn off the heating at night, I can't sleep well and I often get up to turn it off.