 Dimax Controls
 - Manufactures and installs digital control systems to improve the operation of physical plants in buildings.- Reliable Controls Corp.
- Manufacturers of BACnet compliant direct digital controls for energy management and building automation systems.
- Walker Systems Corporation
- Develop and manufacture programmable, real-time, distributed control systems.
- ACS
- Electronic components providing automation and control for buildings, including CEBus products and custom embedded controllers.
- American Auto-Matrix
- Designs and manufacturers building automation and access control systems, components, and software for various commercial and industrial control applications.
- AMX Corporation
- Designs and manufactures control systems for the operation of audio, video, lighting, and other electronic equipment.
- Andover Controls
- Manufacturer of intelligent, programmable, network-based building automation systems.
- Applied Digital, Inc
- Offer automation controllers and systems.
- Blue Earth Research
- Designs and manufactures the Micro-440e, Micro-485, and Xplor PDC series of 8051 and 8052 BASIC programmable controllers for automation and control.
- Centaurus Systems, Inc.
- Systems integrators in the facilities management and process control industries. Creators of Pegasus software.
- Chalmor Limited
- Specializes in heating and lighting control products for industry and commerce.
- Computrols, Inc.
- Providing building automation systems to control lighting, building access, HVAC systems, and fire alarms.
- Crestron Electronics, Inc.
- Manufacturers high-end control systems for corporate, institutional and residential markets.
- Delta Controls, Inc.
- Manufactures intelligent building automation systems, using hardware and software for DDC control of various HVAC, lighting and access systems.
- Echelon Corporation (5)
- Energy Control Technologies
- Jardware, software, installations, and design services for turn key building automation system.
- Excel Energy Technologies, Ltd.
- Involved in the manufacturing, service, sales, support and consulting sectors of the energy management industry.
- FieldServer Technologies
- Designs and manufactures data communication devices that enable field devices to communicate to each other, to Ethernet, or a PC.
- H I Solutions, Inc.
- Specializes in building automation, environmental control, and energy management.
- iScape
- Maker of a Windows 2000 / XP based building monitoring and control system with interface to X10, proximity reader, and Universal IR remote.
- Richards Zeta
- Manufactures graphically programmed controls for building automation, energy management and temperature control systems.
- Vantage
- Manufacturer of lighting control and automation systems.
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