New technology and design of air conditioners has been centered around running efficiently. In most cases, the motor at the center of the air conditioner has been changed from a piston based energizer to a moving scroll system. The results of this change are that your bills will be lower, and your unit will last longer. If you are considering buying a new heating system, take time to consider your options. Your local utility rate might influence your decision toward one type of furnace fuel over another.
Installation is another important factor to consider.
If you already have natural gas, it might be too costly to change. You must consider if it is worth while to put in a high efficiency heating system that will save money in the long run. There are some alternate roots you can explore. For example, solar energy, heat pumps, or even intensive energy conservation methods. Consult your local utility company and a heating contractor to come to the house so they can give an accurate estimate.