- Economy Air Conditioning and Heating, Inc.,
 - Englewood - Industrial/commercial mechanical contractor serving the Rocky Mountain front range. - Energex Enterprises, Inc.
- Erie - Sells the Door Miser and Cooler Miser: logic controls for heating and cooling systems.
- Rocky Mountain Mechanical Systems, Inc.
- Denver - Commercial and industrial refrigeration, heating, ventilation, air conditioning, and controls.
- Ronald R. Thomas, PE - Engineering Services
- Littleton - Specialising in solving HVAC and energy conservation problems.
- GEA Integrated Cooling Technologies, Inc.
- Lakewood - Provides cooling tower construction, upgrades, inspection maintenance, repair services, and replacement parts such as fans, nozzles, and drive shafts.
- Westech Mechanical
- Englewood - Design build and direct digital controls.
- A-1 Heating and Air Conditioning Service, Inc.
- Greeley - Specialises in residential and commercial furnace and air conditioning installations.
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