A DDC control system is a type of building automation system that is used to control and monitor the climate and energy usage of a building. It is designed to maximize the efficiency of the building’s HVAC system, while also providing a comfortable environment for occupants. The system is composed of a network of sensors, controllers, and actuators that are connected to a central computer. The computer collects data from the sensors and then sends commands to the controllers and actuators to adjust the temperature, humidity, and other parameters. The system can also be programmed to respond to external conditions, such as weather, to ensure the building’s environment is always comfortable and energy efficient. DDC control systems are an important part of any modern building, as they can help reduce energy costs and improve occupant comfort.