A. O. Smith Corporation is the manufacturers of commercial and residential water heating equipment and water treatment products of the world. The company specializes in offering innovative and energy-efficient solutions and products, which are developed and sold on a global platform. A. O. Smith reports operations under two geographic segments - North America and Rest of World. North America segment engages in manufacturing and marketing of water heaters, boilers, water treatment products, commercial solar water heating systems, expansion tanks, swimming pool and spa heaters, and others. These products are sold primarily to the company's commercial and residential customers in North America. Main product brands under this segment are Lochinvar, Aquasana, Bradford White, Rheem, Rinnai, Navien and Aerco. Rest of World segment comprises operations primarily manufactures and markets vast products, comprising fully modulating, non-condensing gas tankless water heater, air purifier and water treatment products.