Lennox International Inc.

Lennox International makes heating, air conditioning, and refrigeration equipment for homes and commercial buildings. For homes, they sell furnaces, air conditioners, and heat pumps under brand names like Lennox and Armstrong Air. For businesses and industrial use, they make larger HVAC systems, commercial cooling equipment, and refrigeration units. The company sells these products through distributors and their own stores, and also installs and services commercial systems.