- Energy Control Systems, Inc.
 - Designs and installs energy management and building automation systems for commercial, retail, and industrial buildings. - International Systems of America, Inc.
- Systems support and service of building automation equipment, including energy management, fire, and security.
- Clawson Communications, Inc.
- Installation of network cabling systems.
- C&C Building Automation Company, Inc.
- Energy management control contractor specializing in Novar, Circon, Solidyne, and CPC systems.
- Automatic Building Controls
- Building, energy, and temperature control management systems in northern Illinois, southern Wisconsin, and northwestern Indiana.
- Sound Energy Systems
- Specializing in temperature controls, energy management and building automation. Serving the Northwest.
- TSBA Controls
- New York City metro area provider of products and services for controlling building environments.
- Commercial Air, Inc.
- Arkansas distributor for Andover Controls. Also specializing in building automation, security and access control, and HVACR.
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