Air conditioning seems like a simple way to stay cool in the hot summer. But, cooling your home is more complicated than most people realize because you are using energy to remove heat. Electricity can be costly but that is used to operate an air conditioner which takes heat from a cooler place and dumps it in a warmer place. The most commonly used air conditioner uses a compressor cycle that is similar-to your refrigerator, which transfers heat from your house to the outdoors.
Heat pumps cool a larger area or even the entire house. A large compressor unit that is placed outside your home. Heat pumps are like central air and can pump through ducts but the difference is that these heat pump units can be reversed and used for heat during the colder months.
Central Air Conditioners
Central Air will cool your entire home through ducts. The ducts used for the central air are also used with a furnace for forced hot-air heating. Usually the central air will use the furnace fan to push air through the ducts and into the house.