An Air conditioner uses chemicals that can easily convert from a gas to a liquid and back again. This chemical is used to transfer heat from air inside of a house or home to the outside air. It has three main parts known as compressor, a condenser and an evaporator. The air conditioner can change the humidity, temperature, even the any quality of the air from our home. Mostly, an air conditioner makes our home cooler, by absorbing heat energy from the home and transferring that heat outside, then replacing the air inside our home with cooler air.