Our success factors Development, Production & Sales The complete range of motors, fans and air handling units is mainly manufactured at the Rosenberg Group’s own production sites. From technical advice via assembly to delivery of air handling units that are wired ready for connection, the customer receives all services first-hand from the Rosenberg Group. Our energy-saving EC motors are developed and manufactured exclusively on our modern production line at our Künzelsau headquarters. By a combination of know-how and innovative prodcution technology we achieve a quality that can cope with the highest demands. With the introduction of Ecodesign Directive 2009/125/EC (ErP), compliance with minimum energy efficiency requirements for Energy-using Products is required. Rosenberg fans with EC motors currently already fulfil 100% of the limit values valid from 2013.

Complete solutions at first hand We combine many years of experience, innovative development and state-of-the-art production techniques.

Leading the way! Energy efficient EC technology As a forward-thinking company, we identified a long time ago that a sensible processing of energy is of crucial ecological and economic significance – particularly with regard to CO2 emissions and rising energy prices. Therefore our engineers and technicians are constantly working to improve the energy efficiency of our products – and with success: Our motors with modern EC technology are more than 90% efficient and save up to 50% in energy as opposed to conventional motor technology. The low energy consumption not only contributes towards protecting...

very high degree of efficiency integrated controller (continuous control) very simple connection additional functions (pressure control, etc.) smaller-sized motor for the same level of performance less power consumption Fascinatingly efficient Operation with an EC motor very efficient EC technology preserves the environment and reduces costs at the same time.

Functional Principle Energy efficient EC motor technology A Rosenberg EC motor (EC = electonically commutated) is a brushless, direct current, external rotor type of motor. In commutation electronics, an AC voltage is changed into a direct voltage by a commutator. The motor position is dependent upon voltage supplied via an inverter module (similar to the principle of a frequency inverter). The EC commutation electronics are different from a frequency inverter in that they decide how the motor phases in the stator are supplied with current (commutation) depending on position, rotation direction...

Commutation electronics Mains- / and control connections Permanent magnet Laminated sheets Bearing system Depending on the application area is possible to adopt further control functions (e.g. constant pressure control, volume flow control, temperature control). Conventional DC motors have a housing which contains all the assembly groups like carbon brushes, the collector, bearing, armature with winding , etc. They are arranged one after another. With the EC motor assembly, more space is saved and a collector and carbon brush are not necessary. Therefore the motor is significantly shorter and...

EC Centrifugal fans with backward curved impellers Features and Designs High-efficiency centrifugal fans with backwards curved impellers were designed especially for application in modern ventilation and air conditioning units, and are suitable for carrying air that does not contain too much dust and less aggressive gases and vapours. The sizes correspond to the standard R20 range as per DIN323. The size description corresponds to the impeller diameter. Housings are made of galvanised steel sheet metal with the housing’s side parts connected to the spiral baffle plate via a standing seam. There...

Air volume performance curves: 0 • integrated control (EC Control) • complete system with reduced operating costs due to use of EC technology • continuous control • backward curved impeller • compact space-saving design Sound levels: LWA rel A-weighted at V = 0,5 * Vmax LWA5 [dB(A)] Suction side

EC Duct fans with backward curved impellers, swing-out Features and Designs Rosenberg duct fans combine the advantages of axial fans – straight flow and easy assembly – with high pressure stability, low noise levels, and the sophisticated efficiency of centrifugal fans. The size description corresponds to the impeller diameter. Housings are made of galvanized steel sheet metal in the shape of rectangular ducts for direct installation into an air duct in every position. Complete motor wheel units swing out for cleaning purposes. The sound-attenuated range (WS) provides extremely low noise values...

Air volume performance curves: 0 • integrated control (EC Control) • complete system with reduced operating costs due to use of EC technology • continuous control • backward curved impeller • compact space-saving design Sound levels: LWA rel A-weighted at V = 0,5 * Vmax LWA2 [dB(A)] Housing

EC Roof fans with backward curved impellers Features and Designs Sizes 310-450 have a weather proof plastic impeller made of PA6 (polyamide) and sizes 500-630 have an impeller made of sea water proof aluminium. Maintenance-free ball bearings enclosed on both sides with a long-term lubricant provide a long service life. Base frames with threaded bolts for tightening of suction side accessories and retracted injection nozzle made of galvanized sheet metal steel. Rain protective hood and square housing made of sea water proof aluminium. Motor cage with integrated shock-protection made of plastic...

Air volume performance curves: 0 Type (Pressure control)* • integrated control (EC Control) • complete system with reduced operating costs due to use of EC technology • continuous control or regulation • backward curved impeller • pre-assembled device switch Type (Control operation) * assembled pressure sensor by default Sound levels: LWA rel A-weighted at V = 0,5 * Vmax LWA5 [dB(A)] Suction side