The company has 24 locations worldwide, including five manufacturing facilities in North America, as well as plants in Bengaluru in India, Nanjing in China and Veldhoven in The Netherlands.

In the past, A. O. Smith has had numerous other product lines. Among them, it was the largest bomb maker in the United States by the end of World War I. Smith ranked 74th among United States corporations in the value of World War II military production contracts.

The A.O. Smith Corporation was founded in 1874 by Charles Jeremiah Smith as C. J. Smith and Sons, a baby carriage and bicycle parts manufacturer. They began forming steel tubing from sheet metal to make bicycle frames. By 1895, the company was the largest bicycle parts manufacturer. In 1899, Arthur Oliver Smith, a son of the founder, developed the world’s first pressed steel vehicle frame and they later began making frames for the Peerless Automobile Company, Cadillac, and Ford Motor Company. In 1904, the company incorporated in Milwaukee, Wisconsin, as A. O. Smith Company.

A. O. Smith Water Products Company is headquartered in Milwaukee, Wisconsin. The Ashland City, TN location is home of the world’s largest water heater factory.A.O. Smith Corporation manufactures the following types of water heaters for residential uses: gas and propane, hybrid, electric, tankless, and solar. The company manufactures following types of water heaters for commercial uses: oil-fired, gas and electric, as well as boilers, storage tanks, and skid systems. They also provide the following accessories: pump tanks, and expansion tanks.

According to wikipedia