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A. O. Smith is one of the world’s leading providers of water heating and water treatment solutions.

A. O. Smith employs over 16,000 persons worldwide. We have manufacturing facilities in the USA, Canada, Mexico, China, India, the Netherlands, and Turkey. Sales and distribution cover over 60 countries worldwide.

As a global water technology leader, we are working on developing state-of-the-art solutions that are pushing new boundaries and paving the way in our industry.

AO Smith 145 years



In the summer of 1874, Charles Jeremiah Smith started a small business in Milwaukee, Wisconsin, making “hardware specialties.” A.O. Smith has cemented a legacy in automobile parts manufacturing before establishing itself as the current industry standard in water heating and treatment systems.








Throughout the years, with its continuous improvement in technology, AO Smith has received many valuable international awards

AO Smith Awards


  • 1874

    The Smith family starts a small mechanical shop in Milwaukee, USA.

  • 1889

    Company becomes the largest US bicycle parts manufacturer.

  • 1906

    A. O. Smith becomes North America's largest automobile frame manufacturer

  • 1927

    A.O Smith perfect mass production of line pipes, instrumental for the natural gas industry

  • 1936

    A. O. Smith patents the process of glass lining a water heater tank, establishing the standardin the water heater industry.

  • 1954

    Water heater division introduces the first glass-lined commercial

  • 1995

    A. O. Smith enters China. Within 15 years, A. O. Smith becomes #1 water heater brand in China.

  • 1996

    Amici Mercantile Inc. and A. O. Smith became partners 

  • 2001-2011

    A. O. Smith acquires State Industries, GSW, and Lochinvar. A. O. Smith becomes the Largest water heater company in North America

  • 2009-2019

    A. O. Smith enters the water purification industry with facilities in China, india, Vietnam, Turkey, and the USA. A. O. Smith becomes market leader in China by 2015



  • 1996

    World's first tankless RO water purifier (Tankless)

  • 2004

    The world's first asymmetric RO membrane technology is used.

  • 2005

    World's first tankless RO water purifier (Tankless)

  • 2006

    RO technology non-pump household water purifier with large capacity 125GPD.

  • 2008

    Water purification equipment using the world's first advanced RO membrane roll. technology.

  • 2008

    World's first non-pump RO water purifier with single RO membrane.

  • 2009

    RO water purifier with the highest water recovery rate in the world.

  • 2010

    RO water purification technology - First Side Stream in the world.

  • 2010

    AO Smith launches Voltex hybrid heaters