Types of Central Air Conditioning Systems

Types

• Central air conditioning systems are available in two types: a split-system unit and a packaged unit. A split-system unit consists of two parts. The first half is a metal cabinet that contains a compressor and condenser. The cabinet sits near the home but is on the outside. The second half is a metal cabinet that sits inside the home and contains an evaporator. If heating is present, the indoor cabinet might contain a portion of a heat pump or furnace. A packaged central air conditioner puts all parts of the unit in one metal cabinet. The compressor, condenser and evaporator are grouped together. The unit is then situated on the roof or on a concrete slab that sits near the foundation of the home.

Warning

• You might need a heating, ventilation and air conditioning (HVAC) contractor to install or upgrade your central air unit. Even if you decide to do the project on your own, a problem could arise where you need professional assistance. According to Consumer Reports, you should hire only contractors who show you proof of bonding and insurance. The contractor also should have proof of required contractor's licenses. You also can check with your local Better Business Bureau or consumer affairs office to see if any customers have filed complaints against the contractor. You also might want to ask if the contractor is certified by trade organizations such as North American Technician Excellence or HVAC Excellence.

Considerations

• Central air conditioning systems require yearly maintenance. Serious problems, such as if the unit stops cooling, usually require the help of a contractor. However, you can possibly perform basic maintenance steps on your own. Furnace Compare reports that debris is the biggest problem that impairs air conditioners. Outdoor parts, such as condenser coils on a split-system unit, often become clogged with twigs, leaves and dirt. In addition to cleaning the coils, you should inspect the ductwork, air filters and condensation lines. Contact a contractor if you can't perform these steps on your own.

History

• Central air conditioning systems wouldn't exist without Willis Carrier. According to American Inventors, Carrier is the engineer credited with inventing air conditioning. The seed for Carrier's air conditioning idea was planted in 1902, when he was given the job of reducing the heat in a print shop. The heat in the shop was so intense that it began to affect the ink. Carrier created a humidity controller that passed air over coils containing a coolant, very much the way modern air conditioners work. The result was a device that provided cool air.