New EPA and state regulations require manufacturers to meet strict standards when developing furnaces, boilers, and air conditioning systems. For instance, since 1980 all gas valves have to be double seated. This means that each chamber must fire and prove itself before the primary gas valve will be turned on. Spark ignition, hot surface ignition, and other ways to light the gas valve are now safer and more efficient in operation. Heat exchangers are built to last longer and operate more efficiently.
Control systems use the latest technology to operate the heating and cooling system.
Make A Good Investment You are probably looking for the greatest return on your investment. This does not mean that you should buy the least expensive product or system on the market. In fact, if you spend a little bit more now on the energy efficient system, it is often more economical in the long run because your investment will pay for itself in energy savings. One of the best ways to analyze the costs of replacing your old unit is the payback method. Divide the total cost of the product by the estimated yearly energy savings.