What Does Central Air Mean?

What Does Central Air Mean?In the HVAC industry, there are a lot of technical terms that get thrown around. Central air is one of them. You’ve probably heard a technician talk about it and wondered what they were talking about.

Well, wonder no more! In this article, we’ll explore what central air is and how it works.

What is Central Air?

Central air is a common term referring to most whole cooling systems used to regulate the temperature in buildings or homes in Apopka. These systems, also known as air conditioners, replace the hot air in a room with cooler air that passes over a series of cold coils.

Central air conditioners come in two types: packaged and split systems. The difference between the two types is the design and the mechanism.

The split system comes with an outdoor and an indoor unit, while the packaged system only has one restricted to the indoors. The prior is more efficient at cooling large spaces and the latter at limited spaces.

How Does an Air Conditioner Work?

The working principle of an air conditioner depends on a cycle. It begins when the indoor air gets warmer beyond your desired set point. The thermostat turns on and signals the AC system to start cooling.

The indoor unit using fans pulls warm air from the room through the return ducts. It passes through filters to remove airborne pollutants such as dust and pollen. This air enters the evaporator coil chamber, where the liquid refrigerant absorbs the heat.

The refrigerant vaporizes and starts the cooling process. The cold air gets blown back by a blower fan into the room through the supply ducts and registers. On the other hand, the warm refrigerant then passes through the expansion valve into the outdoor unit via the suction line connecting pipe.

In the outdoor unit, the refrigerant passes through the compressor to increase its pressure and temperature. The hot pressurized refrigerant then enters the condenser coils. These coils have cool air over them that gets blown by a fan.

The heat from the refrigerant gets transferred to the air, and the refrigerant starts to condense into a liquid form. The now cooled and liquefied refrigerant passes back into the indoor evaporator coils through the connecting pipe called the discharge line. The cycle repeats as long as the thermostat remains on. (1)

What is Included in a Central Air Conditioning System?

The packaged and split system utilizes the power of a thermostat to control the indoor temperature. The two also use ductwork to distribute the cooled air.

Other than that, each system has the following:

In the split system:

  • Indoor unit. Fan coil or furnace that has evaporator coils and fans to circulate air.
  • Outdoor unit. Compressor, fans, and condenser coil.
  • Copper tubing. Carries refrigerant between the two units.

In a packaged system:

  • Compressor, fan, condenser coils, and fan coil unit in one cabinet.

Keeping your home cool during those hot summer months is crucial for comfort. And knowing a little bit about how your air conditioner works can help you maintain it better. For more information about central air, contact Eggert Cooling & Heating.

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