Direct Digital Control (DDC) offers the most precise control available for HVAC and automation equipment requiring closed-loop control. DDC is performed by a digital processor which establishes a control signal based on computation instead of mechanical effect. For example, Auto-Matrix DDC can maintain building temperatures within very tight tolerances, typically a fraction of a degree-precision that mechanical controls cannot provide.

Auto-Matrix products provides a range of DDC strategies applicable to many different application requirements. Some of the many examples include:

	multi-loop air handler control
	static pressure control for variable air volume (VAV) systems
	VAV box control
	lighting level control
	steam valve control
	chiller control
	outside air reset control
	economizer control