Make Sure Your Ceiling Fan is Spinning The Right Way. Almost all fans have a switch to change the fan direction. It's an up/down or left/right switch on the side of the fan (between the light and the fan blades), and it's usually unlabeled. .

Install Ceiling Fans If You Don't Have Them. Fans can make you feel 3 to 8 degrees cooler, allowing you to dial your AC to a higher temperature and still feel just as cool. .

Raise The Temperature. Is raising the thermostat a degree or two really gonna kill ya? I don't turn on my AC unless it's more than 96 degrees outside, and then only if my computer is running. Each degree below 78°F will increase your energy use by 3-4%. .

Air Conditioning's Operation. Central air conditioners have two separate components: the condenser and the evap­orator. The condenser unit is usually located outside the house on a concrete slab. .

Condenser of Air Conditioning. From the compressor, hot refrigerant vapor moves to the condenser. Here the high pressure hot refrigerant vapor is cooled by air blowing over finned condensing coils by the condenser fan as it moves through the finned coils. .

Air Conditioner's Installation. Follow the manufacturer's instructions carefully when installing a window unit. It's essential that the unit be stable for safety reasons. .