Kirkland & Ellis represented Madison Dearborn Partners, a leading private equity investment firm based in Chicago, and its portfolio company Air Control Concepts (AIR), a company that partners with and supports leading commercial HVAC equipment manufacturers, in connection with an equity investment in AIR by funds managed by Blackstone’s private equity strategy for individual investors. Terms of Blackstone’s investment were not disclosed. Read the transaction press release The Kirkland team was led by corporate partners Jon-Micheal Wheat and Kevin Stocks; debt finance partner Maureen Dixon; and tax partner Rachel Cantor.