With a view to saving power I wondered if I was going to be out of the house for 8 hours would it be cheaper to leave the central heating on or turn it back on when we get home?
I know it would be a tremendous boost to the boiler to get up to room temperature again & we would of course be cold but we could always turn the ceramic heater on while the boiler was doing it’s stuff.
I’d turn it off if you are you are going to be away for that long. You could always fit a timer switch so you could turn it on about half an hour before you got home.