AAON, Inc was founded in 1988 with the acquisition of the heating and air conditioning division of the John Zink Company. AAON Coil Products, Inc. was founded in 1991 with the acquisition of Coils Plus, Inc. of Longview, Texas. Expansion and growth continue today with the addition of new production lines and new machinery. The Tulsa offices and manufacturing facilities are over 1 million sq. ft.; the Longview offices and manufacturing facilities are over 250,000 sq. ft. In the two plants combined, AAON employs over 1300 individuals.

Bioclimatic Air Systems brings new energy and an innovative approach to a familiar challenge – the fight against unhealthy, contaminated air in public spaces and workplaces.  Backed by world class research and technical service programs plus decades of commercial and industrial expertise, Bioclimatic Air Systems delivers the right air quality system for every application.


Wilbur R. (Bill) Carnes began to manufacture and sell his first products near the end of 1939. Bill and his family lived on the east side of Madison, Wisconsin near Lake Monona. His first employee was hired in January, 1940. Prior to starting the company he took a leave of absence from his position as a chemical salesman and developed a method to take metal shavings out of the oil coolants that he was selling. His first products were sump tank cleaning machines that were manufactured for use in machine shops, including the Rock Island Arsenal in Illinois.

ClimateCraft® manufactures custom air handling units (AHUs) for Commercial, Education, Government, Healthcare, High Tech Manufacturing and Life Sciences environments. Their engineering expertise generates innovative custom solutions which include AHUs that fit into spaces with limited accessibility, fan array towers that feature redundancy and minimize air flow disruptions, stand-alone towers, replacement fans, and air flow measurement and fan monitoring equipment.


ClimateMaster’s role as a domestic energy and geothermal heating and cooling leader extends back to the late 1950s when the company was first founded in Florida. ClimateMaster was later relocated to New York where it started manufacturing water loop heat pump systems, and finally moved its headquarters to Oklahoma City where it continues to thrive today.

For more than 50 years, the company has been developing and producing the industry’s most innovative and energy efficient heating and cooling systems.


DCA - Dehumidifier Corporation of America

Dehumidifier Corporation of America’s mission is to solve our customer’s dehumidification problems while offering the highest quality products at a competitive price employing the latest proven technology and built to the highest standards by American craftsmen.  Founded in 1995, Dehumidifier Corporation of America (DCA) is a US Corporation that is totally dedicated to the field of Dehumidification.  Dehumidifier Corporation of America takes pride in offering the best possible product line incorporating the latest proven technology at the most competitive price in the industry.

Micro Control Systems designs and manufactures microprocessor based controllers for the hostile environment of the HVAC/R industry. Their product line also includes a wide variety of peripheral devices to complement their controllers including temperature, pressure, humidity and current sensors, as well as custom support software for Windows-based pc’s that allow the user to monitor and interact with the controller from anywhere in the world.



Nailor Industries, Inc. is known for industry leading customer focused approach to providing innovative commercial and industrial HVAC products. Nailor manufactures a unique and comprehensive line of products essential for a well designed HVAC system.  Product offerings include Air Control & Distribution products, VAV Terminal Units, Green Building products, Fan Coil Units, Electric Duct Heaters, Sound Attenuators, Air Handling Units, and Filter Housings. Coupled with a wide range of product offerings and industry leading design, testing and manufacturing capabilities, Nailor offers a single source solution for all of your HVAC needs.


Neptronic is a private corporation that designs, manufactures and distributes products for the HVAC industry  including intelligent controllers, electronic actuators, actuated valves, humidifiers and electric heaters.


In 2003, Upstate Parts & Supply established NuClimate Air Quality Systems Inc. as a subsidiary of UPSTATE to serve the indoor air quality market. NuClimate Air Quality Systems (NAQS) manufactures and sells the patented “Q” Terminal and also sells “The Pool System” through a network of independent representatives in the United States.

Panasonic is one of the largest product manufacturers in the world, comprised of 473 companies and employing over 260,000 people. They also own one of the world’s largest patent portfolios. And while some may still think of them merely as a consumer electronics company, they are a global provider of comprehensive solutions for businesses as well as consumers — solutions for your home, your work and when you travel. Panasonic Corporation of North America is the principal North American subsidiary of Panasonic.

The Smardt Chiller Group was established to maximize the customer benefits of the Turbocor oil-free centrifugal compressor technology in chiller performance. Driving whole life costs of ownership way down, your Smardt chiller saves you money, year after long year, while reducing your carbon footprint and making a major contribution to the future of the planet. Working with the Turbocor technology longer than any other HVAC manufacturer in the world, the Smardt Chiller Group has developed a lead in performance and reliability which translates into major benefits for owners – and the environment.



Thermolec has been the supplier of choice for contractors and OEM’s since 1973 because of a level of service never before seen in the industry.  They design and manufacture electrical heating equipment, modulating controls and residential humidifiers.  Their products have been shipped throughout the world from two manufacturing plants where ongoing employee training and quality programs ensure the highest level of customer satisfaction.


WattMaster Controls Inc., was founded in 1977, primarily to build electronic controllers for Tempmaster Corporation’s line of air distribution equipment and systems. The company continued to expand its product line to include energy management systems, and later, complete building automation systems. WattMaster has also been very involved in the design and production of OEM controls for many major HVAC manufacturers and industrial automation companies.