Energy Control Systems, Inc. (ECS) is a building automation and energy management company specializing in the design, installation, manufacturing, and servicing of building automation systems. Since 1975, the company has provided automated solutions designed to improve climate control, energy efficiency, comfort, and operating costs for commercial and multi-building facilities.

Energy Control Systems develops customized building automation solutions for facilities ranging from standalone buildings to complex multi-building properties. Its services focus on HVAC control, energy management, environmental control, lighting control, system integration, installation, and ongoing service.