For those living in colder regions the power consumption of room heaters would be a cause for worry. The room heaters work overtime to keep their homes warm. You can cut down on your heating expenses by installing high quality doors and windows that shut without gaps. The cold air from the outside can not come inside when there is no gap. You must allow sunlight to come into the home and heat up the home naturally. Large windows with hurricane proof glasses would be good for this. The rooms must be insulated well and you must get them inspected for leaks regularly by professionals. The kitchen floor and attic must also be insulated so that there is no unnecessary loss of hot air. In summer it is better to install an air-conditioner with a smaller capacity than the large one that you already have. Most people install larger than necessary air-conditioners to get faster cooling but this would be a waste of electricity.