Frederik Ljungström of AB Ljungström Ǻngturbin (ALǺ) in Stockholm, Sweden invents and patents the Ljungström® Air Preheater
1920

ALǺ’s first installation in USA was manufactured in Wellsville [New York] for installation at the International Paper Company of Niagara Falls, New York, USA
1923

The USA great depression lead ALǺ to sell Air Preheater Corporation (APC) to the Superheater Company of America
1933

Air Preheater Corporation (APC) and The Superheater Company merged with Combustion Engineering Company, Inc. (CE)
1948

On February 24th APC changed its name to Air Preheater Company Inc.
1965

Asea Brown Boveri Ltd. (ABB) acquires the power business of Gadelius K.K.
1988

ABB acquires Air Preheater Company and Combustion Engineering, Inc. and ABB Air Preheater Inc. was formed1990 The power business of Gadelius K.K. renamed to ABB Gadelius K.K.
1992

ABB acquire the air preheater business of Kraftanlagen Abgastechnik GmbH, in Bammental, Germany
1995

ABB Air Preheater Inc. acquire all intellectual property rights and assets to the Ljungström® Air Preheater technology from SRM in Sweden
1997

ALSTOM acquire sole ownership of the ABB Power business
2000

The oldest known operating Ljungström® Air Preheater is retired after 83 years of operation at the Fitchburg Paper Company in Massachusetts, USA
2009

LJUNGSTRÖM, as a division of ARVOS Group, separates from ALSTOM
2014