A traditional central air conditioning system has two parts: an indoor unit, such as an air handler or furnace and evaporator coil, and an outdoor unit, such as an Air Conditioner or Heat Pump. An air conditioner is the outdoor unit of an air conditioning system which contains the compressor. These units are only capable of cooling your home (if heat is needed it must be provided by a separate heating equipment). Goodman air conditioners range from 13 to 16 SEER among the highest efficiency ratings in the industry. A higher SEER saves you money on your electrical utility bills.