The definition of A/C controls is a system of devices that regulate the temperature, humidity, and air quality of a room or building. A/C controls can be manual or automated, and they can be used to control a single room or an entire building. Manual A/C controls involve manually adjusting the temperature, humidity, and air quality of a room or building, while automated A/C controls are computerized systems that can be programmed to maintain the desired temperature, humidity, and air quality levels. Automated A/C controls are typically more efficient and cost-effective than manual controls, as they require less manual labor and can be programmed to maintain the desired levels with minimal effort. A/C controls are essential for maintaining comfortable temperatures and air quality levels in a room or building, and they can also help to reduce energy costs by ensuring that the temperature and air quality levels are maintained at optimal levels.