Mine comes on around 5am-8am to take the chill off for whichever shift I am on it covers it, goes on for an hour at 11am then on again at 4pm-11pm. I have my thermostat set in hallway at 22C pretty much the whole time, unless I want to turn it off then I turn it down.
Why do you have it come on for an hour at 11am?
Our heating is pretty dated and we have a hot water tank so both come on twice day (morning / evening) and then if its chilly we pop it on again when needed.
Sometimes just use the fire in the living room rather than heating the whole house but not sure what's more cost effective really.