Since 1981 Rosenberg Ventilatoren GmbH, located in Künzelsau-Gaisbach, has developed into an outstanding centre of the air movement and air handling industry by the design and production of controilable extemal rotor motors With annual production of about 120 000 tans we currently export 55%of the total company turnover. Our extensive knowledge regarding the design and production of air movement products is shown by our certification according to DIN EN ISO 9001 and by our membership to the quality society of RAL-RLT.