A central air system is a type of heating, ventilation, and air conditioning HVAC system that cools and distributes air throughout a building. It typically consists of a central unit, such as a compressor and condenser, located outside, and an air handler or furnace inside. Ductwork carries the cooled air to various rooms, ensuring even temperature control. These systems are efficient for larger spaces, as they can cool multiple rooms at once. Central air systems often include a thermostat, allowing users to set and maintain their desired temperature. Regular maintenance is essential for optimal performance and energy efficiency.