 TULSA, Okla., Dec. 03, 2020 GLOBE NEWSWIRE -- AAON, Inc. NASDAQ: AAON, a leading manufacturer of heating and cooling products, announced that its RN Series Rooftop Unit with Variable Speed Compressors has been voted by the readers of Consulting-Specifying Engineer the 2020 Most Valuable Product - the top Product of the Year award receiving the most overall votes. The AAON LF Chiller Controller has also been voted 2020 Product of the Year - Gold in the BAS, Controls, Energy Management category. 