Innovations and technology leadership

The origin of today's DencoHappel goes back to 1909, when the German Luftfilter-Baugesellschaft mit beschränkter Haftung (DELBAG) was founded in Breslau. On the other hand, Otto Happel founded the "Gesellschaft für Entstaubungs-Anlagen GmbH" (GEA) in Bochum in 1920, and in Great Britain, DENCO was founded in 1944, which was taken over by GEA in 2006.

Starting with the production of textile filters to filter the cooling air of electric machines, Otto Happel rapidly continued to develop the company. By 1922, he revolutionized the circulatory water cooling system of large electric machines by using the elliptical finned tube, which was also launched on the heating market after 1945.

The next major step took place in 1954 with the founding of HAPPEL KG, in which the continuously expanded manufacture of convectors was consolidated.

In 1970 – fifty years after its founding – the current DencoHappel could refer to 8,000 air-cooled installations in process engineering, and simultaneously the 500,000th heating unit left the factory.
The breathtakingly fast growth of the company demanded new business structures. In order to finance the influx of capital, GEA AG was gradually transformed and went public in 1989.

The takeover of DELBAG Luftfilter GmbH, Berlin in 1990 completed the entry into air-filtration technology.
In 1999 Dr. Otto Happel, who at the time held the majority of GEA common stocks, sold his shares to Metallgesellschaft AG, which was renamed "mg technologies ag" in 2000, and initially he remained one of its major stockholders.

With the merger of "Gesellschaft für Entstaubungs-Anlagen“ (GEA) with "mg technologies" in 2005, the company was renamed GEA Group AG.
The expansion continued at the same pace: the British company DENCO of Hereford, a specialist in close control and comfort air conditioning systems for industrial and commercial applications, and the Turkish air treatment technology specialist ISISAN of Istanbul were taken over in 2006. The number of production plants for air treatment technology thus rose to nine. In addition, access was gained to new regional markets and applications, such as precision climate control of computer and telecommunication centers in Europe.

During the course of the strategic realignment of the GEA Group, the European private equity investor firm Triton took over the entire heat exchanger business in 2014. The GEA HX Management and Triton reorganized the previous HX business area into three operationally independent segments: Air Treatment (DencoHappel), Heat Exchanger Systems (Kelvion) and Power Cooling Solutions (ENEXIO). The air treatment segment has now been doing business under the name "DencoHappel" since mid-2015, and hence closes the circle to the two major product lines DENCO® and Happel® with their over century-old history, filling both prestigious brands with new life.

In October 2016 a new milestone in the history of the company was achieved: the two companies Fläkt Woods and DencoHappel merged into the FläktGroup. Triton had taken over the Fläkt Woods Group from Equistone Sagard. Fläkt Woods is one of the worldwide technology leaders in air-handling and air conditioning technology. FläktGroup is hence now the new European market leader for energy-efficient solutions in ventilation and air conditioning technology. The group operates in approximately 65 countries around the world and produces annual revenues of about 680 million euros with about 3,700 employees.

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