My heating is temperature controlled and set with a timer. So provided the temperature in the house falls to below 18 degrees the heating is set to come on from 5.30am - 7.00am in the mornings and then again from 5.00pm - 11.00pm in the evenings during the week and slightly later in the mornings on the weekend.
I once read that it actually isn't that good for the house to always go from hot to cold and that it's better to keep it at a fairly steady temperature throughout the winter season; day and night, cranking up by a few degrees when needed. And apparently doing that works out cheaper because the boiler only comes on for a short while each time.
It does sort of make sense to me and I'm tempted to try it this winter; so just wondering what you all think