To find your electric rate, divide your total monthly bill ($) by the total usage (kWhrs).

Are determined by the area you selected on the map. If you know the actual cooling hours for your location, please type that in.

The Seasonal Energy Efficiency Ratio is a measure of the cooling efficiency of your air conditioner or heat pump. The higher the SEER number, the more efficient the system is at converting electricity into cooling power.

The SEER for your new system should be at least 10, preferably 12 or higher. Your dealer can tell you the SEER of new equipment, or you can look for an energy label on the equipment.

To find your gas rate, divide your total monthly bill ($) by the total usage (therms).

British Thermal Unit. Used for both heating and cooling, BTU is a measure of the heat given off when fuel is combusted. One BTU is equal to the heat given off by a wooden kitchen match.

Are determined by the area you selected on the map.

Annual Fuel Utilization Efficiency. Indicated as a percentage, your furnace's AFUE tells you how much energy is being converted to heat. For example, an AFUE of 90 means that 90% of the fuel is being used to warm you home, while the other 10% escapes as exhaust with the combustion gases.

COP for heating HVAC equipment is the ratio of the rate of heating/BTU's transferred by the unit to the rate of total energy input expressed in KW. For the Operating Cost Analysis Program, this is based upon 45 degree ambient outdoor temperature. The COP for the unit can be found in the manufacturer's ratings for their heat pump equipment.