Headquartered in Fort Wayne, Ind., WaterFurnace International Inc. is a leading manufacturer of residential, commercial, industrial and institutional geothermal and water source heat pumps. Notable installations include London’s Buckingham Palace, the 2008 Summer Olympics in Beijing, China, the home of NASCAR’s Darrel Waltrip, and Shania Twain’s home. In addition, WaterFurnace is the exclusive supplier to 100 percent geothermal housing developments, including Bee Creek in Ossian, Ind., and Masters View in Juliet, Tenn.