There are two general types of central air conditioning systems people use to help keep their homes cool:

  • Packaged System
  • Split System

The main difference between a packaged and split system is the location of the evaporator coils. In a packaged system the coils are contained in the outside unit, while in a split system the coils are contained inside the home, typically inside the forced air furnace.


Components of a Central AC System

  • Thermostat – The desired temperature level and power to the AC system is controlled by the thermostat.
  • Air Ducts – When the system turns on, it draws air from within the home through the return air duct and passes it through the AC system to cool the air before sending it back into the home through the air ducts and vents.
  • Blower Motor Fan– The blower motor helps force the air into the home and aids in drawing air back into the system through the return air ducts.
  • Air Filter – The air filter helps remove dust, dust mites, and other small particles, and helps prevent these items from getting inside the system.
  • Compressor – The compressor cools refrigerant and transfers it to the evaporator coil.
  • Evaporator Coil – As the cooled refrigerant passes through the evaporator coil, the blower motor fan blows air over the coil, and sends the cooled air into the ductwork and into the home. The evaporator coil also absorbs heat from the returned air, which causes the refrigerant’s temperature to increase.
  • Condenser Coil – The warmed refrigerant is sent from the evaporator coil to the condenser coil. The heat is released from the refrigerant as it passes through a series of copper pipes within the coil. The external fan on the outside unit also helps release the heat. Then the refrigerant is sent back into the compressor, and the cycle continues until the desired indoor temperature is achieved.

To avoid problems with your AC system, it is important to have it inspected annually to identify potential problems and avoid costly repairs or replacement. Call Kaiser AC at (805) 988-1800 to schedule maintenance or repair service today.