|  | The first step to installing a central  air conditioning is to understand how the system works. Air conditioning  systems consist of three main parts: an outside unit, an inside unit where the  evaporator is located, and ducts or pipes which distribute cold air or water to  different rooms in a building.
 Start by installing the air handler  unit. It is usually installed in a basement or attic. Follow the instructions  that came with the unit. Make sure turn off the main power to the house or  building next!
 
 Continuing with the installation while  having the power on can be very dangerous! Install the compressor. It should be  placed on top of a base. The space surrounding the compressor should be empty,  so don't install it right next to a wall, plants or other items. It should be  placed on a stable and level surface. Turn the power back on. Check to make  sure that the unit is working.
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