HVAC DDC<DDC (Direct Digital Control) controls are a type of building automation system that is used to control and monitor the temperature, humidity, and air quality of a building. This type of system uses digital technology to control the operation of heating, ventilation, and air conditioning (HVAC) systems. The system is typically composed of a network of sensors, controllers, and actuators that are connected to a central computer. The computer is programmed to respond to changes in the environment and adjust the HVAC system accordingly. This allows for greater control over the environment and more efficient use of energy. HVAC DDC controls are used in a variety of commercial and residential buildings, including office buildings, schools, hospitals, and factories. They are also used in green buildings, as they help to reduce energy consumption and increase the comfort of occupants. HVAC DDC controls are an important part of any building automation system, as they help to ensure that the building is comfortable and energy efficient.