Our bungalow is reasonably insulated and retains heat quite well, though no where as efficient as my sons house which has to withstand very low temperatures, ice and snow. We have the thermostat set at 18 deg and it comes on for a short time in the morning and longer in the evening at this time of year. It's the same boiler as installed in 1977! It's enormous, situated in the garage and noisy, though not as noisy as next doors new one! We have oil central heating as there is no gas in the area. The heating engineers seem to enjoy keeping it going. As one said, they don't make them like this today! When we moved here, we were expecting to have to install a whole new heating system as it is warm air heating, which didn't have a good reputation, but this system has been great and good for drying clothes!