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2. List of companies based in Oklahoma City - Wikipedia

   en.wikipedia.org/wiki/List_of_companies_based_in...

   Major companies based in Oklahoma City. Expand Energy - Fortune 500 (163) Continental Resources (NYSE) Devon Energy - Fortune 500 (270) and NYSE [1]

3. AAON - Wikipedia

   en.wikipedia.org/wiki/AAON

   AAON was founded in 1988 when Norman H. Asbjornson set out to create a commercial HVAC company that designed and manufactured semi-custom equipment that would excel in performance relative to the market. [2] Asbjornson purchased the heating and air-conditioning division of John Zink and created a new company called AAON. The name ensured the ...

4. Viessmann - Wikipedia

   en.wikipedia.org/wiki/Viessmann

   The Viessmann Group is a German manufacturer of heating and refrigeration systems headquartered in Allendorf (Eder), Germany. With 22 production companies in 12 countries, distribution companies and representative offices in 74 countries and 120 sales offices throughout the world, Viessmann is international in its orientation.

5. Johnson Controls - Wikipedia

   en.wikipedia.org/wiki/Johnson_Controls

   Coleman Heating & Air Conditioning is a major manufacturing brand of HVAC equipment, and was formerly an independent HVAC manufacturing company. The company began as a division of the Coleman Company in 1958 and was acquired by Evcon in 1990, which in turn was acquired by Johnson Controls in 1996.

6. Goodman Global - Wikipedia

   en.wikipedia.org/wiki/Goodman_Global

   Goodman Manufacturing is an American company operating as an independent subsidiary [1] [2] of Daikin Group, the world's largest manufacturer of heating, ventilation and air conditioning products and systems. The company, founded in 1975 and based in Waller, Texas, manufactures residential heating and cooling systems. [3]

7. Daikin - Wikipedia

   en.wikipedia.org/wiki/Daikin

   Daikin entered the North American air conditioning market in 2004. [ 7 ] In 2006, Daikin Industries acquired McQuay International, a Minneapolis, Minnesota–based global corporation that designs, manufacturers and sells commercial, industrial and institutional heating, ventilation and air conditioning (HVAC) products. [ 8 ]