The Seasonal Energy Efficiency Ratio (SEER) is an energy efficiency rating for air conditioners. The higher the SEER, the better the energy performance, the more you save.

Annualized Fuel Utilization Efficiency (AFUE) is a measure of your furnace’s heating efficiency. The higher the AFUE percentage, the more efficient the furnace.

Select the base AFUE in which to compare your desired energy efficiency rating. AFUE is a measurement of the efficiency with which a furnace turns fuel into usable heat. The higher the AFUE, the more efficient the furnace.

Select the base SEER in which to compare your desired energy efficiency rating. SEER is an energy efficiency rating for air conditioners. The higher the SEER, the better the energy performance.

Ccf, which stands for “100 cubic feet”, is the unit used to measure natural gas volume. Your utility company charges a set rate for every cubic foot of natural gas your home uses. The rate you’re paying per Ccf can be found on your electric bill.

A Kilowatt Hour (kWh) is a measure of energy consumption. It is the standard unit that your utility company uses for billing purposes. The rate you’re paying per kWh can be found on your electric bill.