1917 Hugh C. Gass founds Superior Welding Shop in Hutchinson.
World War II Superior Welding Shop transforms into a training facility, preparing around 200 welders for the war effort.
1945 Superior Boiler Works moves into a 5,000 sq. ft. facility with 10 employees.
1960s Equipment sizes increase, addition of the 3-pass dry back firetube boiler and the new firebox boiler requires more manufacturing space, expanding to 83,000 sq. ft.
1970s Added 3-pass wetback, horizontal return tube boilers and waste heat recovery boilers. Now producing fire tube boilers up to 600hp and fireboxes up to 350hp.
1984 Superior Boiler produces its first (of many) 1000hp gas and oil-fired boiler.
2002 Superior builds the largest single furnace firetube boiler in the industry, a 2200hp dry back.
2014 Superior Boiler purchases Triad Boiler. Product line expands to include both hot water and steam vertical firetube boilers commonly used in commercial heating applications.
2016 Superior purchases English Boiler, adding watertube boilers to its product offerings.
2021 Added another facility in Hutchinson, bringing the company to 300,000 sq. ft. of manufacturing space.
2023 Superior Boiler ships its 20,000th national board-registered boiler, marking a significant milestone in the company's over 100-year history.