Rosenberg Ventilatoren GmbH

Rosenberg Ventilatoren GmbH is a German industrial manufacturer specialising in climate and ventilation technology. Founded in 1981 by Karl Rosenberg in the Künzelsau district of Gaisbach (Baden-Württemberg), the company develops, produces and distributes controllable external-rotor motors, fans and air-handling units. Its headquarters in Gaisbach house the central administration, engineering and production of EC and AC motors and fans, while the engineering and production of air-handling units have been located at Plant 3 in Glaubitz, Saxony, since 2001. The company is the core of the wider Rosenberg Group, which operates production sites and sales offices in more than 45 countries and employs roughly 1,700 people worldwide, generating revenue of around 240 million euros. Rosenberg's product range covers a broad spectrum of ventilation and air-conditioning equipment: radial, axial, duct, roof and tube fans; door air curtains; external-rotor motors; box-type air-conditioning units with heat recovery; and the control and regulation devices needed to operate them. The portfolio is manufactured mainly in the group's own production facilities. The company serves two principal customer groups: the technical building equipment (TGA) sector, with energy-efficient fans, modular and compact air-handling units and door air curtains, and OEM customers, to whom it supplies free-running impellers, housed radial fans and axial fans for use in air conditioners, hygienic units, cleanroom filter units, heat pumps, condensers, coolers, evaporators and chillers. Since 2005 the company has placed particular emphasis on energy-saving EC motors and fans, which are designed to achieve efficiency levels above 90 percent and to save up to 50 percent energy compared with conventional DC motors. The group's international footprint includes production sites in France, Hungary, Germany, Italy, Austria, the Czech Republic and the United States, alongside sales subsidiaries in around 50 countries. In 2023, to secure its future, the Rosenberg Group was transferred into the Karl Rosenberg Stiftung (Karl Rosenberg Foundation), which promotes the identity and culture of the group as a family business and supports charitable organisations, particularly in science, research, art, culture and social projects in the group's regional environment.

Rosenberg Ventilatoren GmbH was founded in 1981 by Karl Rosenberg, a former employee of Ziehl-Abegg, in the Künzelsau district of Gaisbach in Baden-Württemberg. The company initially focused on the development and production of controllable external-rotor motors and fans. Production of external-rotor motors began in 1987. To reduce dependence on external-rotor motors, the company started producing air-conditioning units in 1990. In 1993, Rosenberg began producing hand-wound stators at its Czech site in Klenci. The product portfolio in air-conditioning was expanded in 1995 with the start of production of box-type air-conditioning units in Tokodaltáró, Hungary; three years later the production area there was expanded to 10,000 m². In 2000, a new product line for box-type air-conditioning units was added in Glaubitz, Saxony, where the engineering and production of air-handling units have been based since 2001. International expansion began early: in 1983 Rosenberg founded its first foreign subsidiaries. For the French market, the company Airpro — today Rosenberg France SARL — was established in Lyon; Rosenberg holds 34 percent of that company. The Netherlands is served by Rosenberg Niederlande in Den Dolder. In 1998 sales offices followed in the Russian cities of Moscow, St. Petersburg and Novosibirsk. The Australian market has been served since 2003 by a subsidiary in Melbourne, and in the same year the Chinese market began to be served from a branch in Shanghai. With the founding of branches in Kiev (Rosenberg Ukraina) and Dubai (Rosenberg Middle East) in 2004, the Ukrainian and Arab markets were opened up. The group also grew through acquisitions and joint ventures. The Spanish company airtècnics, based in Castellar del Vallès, was founded in 1986 by Rosenberg Ventilatoren with partners; Rosenberg took over the partners' shares completely in 1993. airtècnics specialises in the production of door air curtains. In Waldmünchen, production of belt-driven fans began in 1991 through the company BavAiria Ventilatoren GmbH & Co KG, founded in 1988. For the production of drum impellers, Rosenberg founded the company D.G.T. Rotor Srl in 1992 with partners, who today hold 27.5 percent, in San Vito al Tagliamento, Italy; the company now operates as Rosenberg Italia Srl. In 1994 Rosenberg acquired 82.41 percent of the French fan manufacturer Ecofit, founded in 1976 and based in Vendôme; Ecofit exports 70 percent of its production, 30 percent of that to non-EU countries, and produces fans on 7,000 m² with around 180 employees. In 2002 Ecofit took over its French competitor Etri, which had an American branch in Charlotte, Etri Inc.; that American branch was renamed Rosenberg USA as part of the acquisition. In 2006, the takeover of Rox Lufttechnik GmbH in Weitefeld expanded the air-conditioning business, accompanied by the founding of Rox Klimatechnik GmbH. Since 2005 the company has placed particular emphasis in development and production on energy-saving EC motors and fans. Motors with EC technology are designed to achieve efficiency levels above 90 percent and to save up to 50 percent energy compared with conventional DC motors. In 2023, to secure its future, the Rosenberg Group was transferred into the Karl Rosenberg Stiftung, which promotes the identity and culture of the group as a family business and supports charitable organisations, particularly in science, research, art, culture and social projects in the group's regional environment. Today the group operates production sites and sales offices in more than 45 countries, employs roughly 1,700 people worldwide and generates revenue of around 240 million euros.

• 2023

  Rosenberg Group transferred into the Karl Rosenberg Stiftung to secure its future as a family business.

• 2006

  Takeover of Rox Lufttechnik GmbH in Weitefeld expanded the air-conditioning business; Rox Klimatechnik GmbH founded.

• 2005

  Focus shifted to energy-saving EC motors and fans, designed for efficiency above 90% and up to 50% energy savings.

• 2004

  Branches founded in Kiev (Rosenberg Ukraina) and Dubai (Rosenberg Middle East).

• 2003

  Subsidiary in Melbourne began serving the Australian market; branch in Shanghai began serving the Chinese market.

• 2002

  Ecofit took over French competitor Etri; its US branch Etri Inc. was renamed Rosenberg USA.

• 2001

  Engineering and production of air-handling units moved to Plant 3 in Glaubitz.

• 2000

  New product line for box-type air-conditioning units added in Glaubitz, Saxony.

• 1998

  Sales offices opened in Moscow, St. Petersburg and Novosibirsk, Russia; production area in Tokodaltáró expanded to 10,000 m².

• 1995

  Production of box-type air-conditioning units started in Tokodaltáró, Hungary, expanding the air-conditioning portfolio.

• 1994

  Rosenberg acquired 82.41% of French fan manufacturer Ecofit, based in Vendôme.

• 1993

  Production of hand-wound stators started in Klenci, Czech Republic; Rosenberg took over partners' shares in airtècnics completely.

• 1992

  D.G.T. Rotor Srl founded with partners in San Vito al Tagliamento, Italy, for drum impeller production.

• 1991

  Production of belt-driven fans started in Waldmünchen through BavAiria.

• 1990

  Production of air-conditioning units started to reduce dependence on external-rotor motors.

• 1988

  BavAiria Ventilatoren GmbH & Co KG founded in Waldmünchen.

• 1987

  Production of external-rotor motors started.

• 1986

  Spanish company airtècnics founded with partners in Castellar del Vallès.

• 1983

  First foreign subsidiaries founded, including Airpro (later Rosenberg France SARL) in Lyon.

• 1981

  Rosenberg Ventilatoren GmbH founded by Karl Rosenberg in Gaisbach, Künzelsau.

Energy-efficient, high-depth-of-manufacture ventilation and climate technology for technical building equipment and OEM customers, backed by a global production and sales network.

• AIRBOX air-handling units

  Modular, individually configurable box-type air-conditioning units; weatherproof and explosion-proof versions as well as TÜV-certified hygienic variants are available.

• SupraBox MODULAR compact air-handling units

  Modular air-handling units bridging the gap between large custom-built units and compact units; flexible and configurable for a wide range of requirements.

• SupraBox COMFORT compact air-handling units

  Pre-configured, ready-to-connect compact units available in variants such as floor-standing or ceiling units for various applications.

• SupraBox DELUXE decentralised compact air-handling units

  Developed for direct installation in rooms such as classrooms, seminar rooms, offices and common rooms; two units with different air flow rates, using an integrated displacement air outlet for draught-free, even air distribution.

• Axial fans

  Used mainly in heat pumps, condensers, coolers, evaporators and chillers.

• Free-running impellers

  Radial fans with free-running impeller designed mainly for installation in equipment such as air conditioners, hygienic units, cleanroom filter units and HVAC systems.

• Housed radial fans

  Radial fans in spiral housings developed for process air and climate technology; versatile thanks to various mounting positions and compact design.

• Door air curtains

  Produced by Spanish subsidiary airtècnics; used for comfort, flexibility and hygiene at frequently opened or open entrances, including industrial and insect-protection applications.

• EC motors and fans

  Energy-saving electronically commutated motors and fans designed for efficiency above 90% and up to 50% energy savings compared with conventional DC motors.

• ECFanGrid

  An efficient fan replacement solution highlighted on the company website.

1. 1Rosenberg Ventilatoren GmbH official websiterosenberg-gmbh.com
2. 2Über Uns - Rosenberg Ventilatoren GmbHrosenberg-gmbh.com
3. 3TGA Produkte - Rosenberg Ventilatoren GmbHrosenberg-gmbh.com
4. 4OEM - Produkte - Rosenberg Ventilatoren GmbHrosenberg-gmbh.com
5. 5Rosenberg Ventilatoren - Wikipedia (German)de.wikipedia.org
6. 6Rosenberg Ventilatoren GmbH - Wikidatawikidata.org