A.O. Smith Corporation manufactures a broad lineup of water heaters, boilers, and water treatment products. The company has two reporting segments, North America (75% of sales) and rest of world (25% of sales). A.O. Smith is the leading manufacturer of water heaters in North America for both residential and commercial markets, with approximately 37% and 54% market share, respectively. Residential water heaters account for most of North American sales and are distributed equally through wholesale and retail channels. Most of A.O. Smith's international revenue is from China, a market the company entered during the mid-1990s.