 TULSA, Okla., Nov. 19, 2020 GLOBE NEWSWIRE -- AAON, Inc. NASDAQ: AAON, a leading manufacturer of heating and cooling products, announced that it received the 2020 Henry Bellmon Award in the Large Business category, from Sustainable Tulsa. The Bellmon nominees were selected from the top-ranking Scor3card verified organizations during the 2019-2020 year. Winners were then chosen from the nomination list by the Henry Bellmon family and members of the Henry Bellmon Judges Panel based on the number of verified items and quality of answers within the Scor3card sustainability assessment and a tracking tool. AAON achieved Platinum level, the highest attainment level, in the 2020 Sustainable Tulsa Scor3card verification program. 