A. O. Smith Corporation operates its business through two segments, which include North America and Rest of World. Both segments manufacture and market a range of residential gas, gas tankless and electric water heaters and commercial water heating equipment. The North America segment manufactures and markets specialty commercial water heating equipment, condensing and non-condensing boilers, and water systems tanks. The Company serves residential and commercial end markets in North America with a range of products, including water heaters, boilers and others. The Rest of World segment manufactures and markets water treatment products, primarily in Asia. The Rest of World segment includes China, Europe and India. The Company supplies water heaters to the residential market in China with a range of product offering, including electric, gas, gas tankless, heat pump and solar units, as well as combi boilers.