Lennox International Inc., headquartered in Richardson, Texas and organized in Delaware, is a provider of climate control products for the heating, ventilation, and air conditioning and refrigeration markets. The company's largest production facilities are in Saltillo, Mexico, Marshalltown, Iowa, and Orangeburg, South Carolina. The company is 9.8% owned by John W. Norris, III, a descendant of DW Norris, who acquired the company in 1904. Wikipedia