DALLAS, July 17, 2012 /PRNewswire/ -- Lennox International Inc. (NYSE: LII) announced the resignation of Robert W. Hau as the company's chief financial officer, and the appointment of Joseph W. Reitmeier as the company's new chief financial officer, both effective July 17, 2012.  Hau, who is leaving to pursue another opportunity, will remain employed with the company through July 31, 2012 to assist with the transition.