Lennox International, Inc. engages in designing, manufacturing, and marketing of products for heating, ventilation, air conditioning, and refrigeration. It operates through the following segments: Residential Heating and Cooling, Commercial Heating and Cooling, and Refrigeration. The Residential Heating and Cooling segment involves in manufacturing and marketing of furnaces, air conditioners, heat pumps, packaged heating and cooling systems, equipment and accessories. The Commercial Heating and Cooling segment offers manufacturing and selling unitary heating and cooling equipment used in light commercial applications. The Refrigeration segment includes manufacturing and selling of equipment for commercial refrigeration market such as condensing unit, unit coolers, fluid, coolers, air cooled condensers, supermarket display cases, and systems. The company was founded by Dave Lennox in 1895 and is headquartered in Richardson, TX.