RadiPac EC centrifugal fans for air handling units (AHU)

RadiPac EC centrifugal fans (plug fans)

Realistic performance specifications: The performance data of the entire fan are continuously measured by means of the components: high-performance impeller, GreenTech EC motor and electric control system.

Effective logistics: A single RadiPac part number includes all components required for your ventilation demands – in the fashion of one-stop shopping.

Simple commissioning: All features necessary for operation are already installed and adapted to one another.

FanGrid: RadiPac easily assembles into FanGrid compatible applications.

RadiPac at a glance

Systematic efficiency

"The result is what matters" – this also applies to efficiency. After all, it is not just the efficiency of individual components which is decisive, but rather the result of their interaction. This is where RadiPac shines with its impressive statistics. The impeller, motor and electronics system are all optimally adjusted to one another, leading to an overall efficiency of well above 60%.

A significant contribution to this efficiency is made by the external rotor design GreenTech EC motor. This is a mains-powered, permanently-energised synchronous motor with electronic commutation (also called BLDC). Its efficiency is significantly higher than the efficiency class IE4, and it achieves this without the use of supply-critical rare-earth magnets. The construction of other permanent magnet motors of comparable efficiency with internal rotor designs requires the use of these rare-earth magnets. This also results in a loss of compactness and simplicity of assembly and commissioning due to the necessary external control electronics.

High-performance impeller

RadiPac high-performance impeller

High static efficiency

  • Aerodynamically optimised blade channel
  • Integrated rotation diffuser
  • Inlet nozzle adjusted to impeller

Low noise emissions

  • Angular trailing edge for optimised flow control
  • Integrated rotation diffuser
  • Inlet nozzle adjusted to impeller

Low vibration

  • Dynamic balancing of the impeller rotor unit minimises the occurrence of structure-borne noise and reduces bearing load

Robust design

  • Suitable for long-term high circumferential speeds
  • Corrosion-resistant aluminium
  • Entirely robot-welded blades

GreenTech EC motor

RadiPac with GreenTech EC motor

Unrivalled compactness

  • The impeller is mounted directly onto the motor rotor

High efficiency

  • Low copper and iron loss
  • No slip loss thanks to synchronous running
  • No hysteresis loss in the rotor due to use of permanent magnets

Economical operation

  • Optimised commutation permits partial-load operation up to 1:10 with maintenance of high efficiency

Low noise emissions

  • Commutation and stator design permit low-noise magnetisation of the field system
  • High, acoustically imperceptible pulse frequency

Long service life

  • Maintenance-free bearings
  • Brushless commutation

Safe operation

  • Insulated bearing system to avoid bearing currents

Electronics with connection area

Electronics with connection range of the RadiPac


  • Infinitely variable speed settings
  • Control signal 0 –10 V DC and MODBUS
  • Integrated PID controller

Universal applicability

  • Various voltage ratings for worldwide use
  • Suitable for 50 and 60 Hz power lines

Safe operation

  • Integrated anti-lock and excess temperature protection
  • Active PFC for 1~ powered motors
  • Environment-resistant cable glands

Simple commissioning

  • Central terminal area for power supply, alarm relay, control and communication
  • Secure separation of terminal area and electronics
  • High-quality terminal clamps
  • No adjustment effort required

Air-performance area

Air performance range of the RadiPac series

RadiPac EC centrifugal fans score highly with their excellent characteristics – from high efficiency to easy handling and low space requirements. For this reason, the product range completely covers the air performance spectrum depicted below.

RadiPac for compact solutions in air handling units (AHU)

The high-performance impeller is mounted directly on the rotor of the external motor. This saves space and allows the entire rotating unit to be balanced on one shaft.

Unrivalled compactness – the GreenTech EC fan.
Unrivalled compactness – the GreenTech EC fan ...
Conventional fans with AC or PM motors require more space.
... in contrast to conventional fans with AC or PM motors.

Installation – simple and safe

Together, the electronics and motor form one unit – this doesn't just save space, but also ensures easy installation: in this respect, an integrated electronics system for commutation and control replaces an external frequency converter. As the motor and electronics in the motor system are already perfectly adjusted to one another, additional electronic filters and shielded cables are unnecessary, as is an external motor protecting switch. The result: there is no longer the need for cost-intensive adjustments before commissioning or for grounding and shielding measures. Plug-and-Play is that simple in ventilation and air-conditioning technology.

A clear advantage over conventional fans (left) with additional devices: The GreenTech EC fan (right) can be installed quickly with all features already on board.

Compact all-rounders: RadiPac EC centrifugal fans

Regardless of which variant you choose, RadiPac EC centrifugal fans always cut a good figure, with sizes from 250 mm to 1250 mm, and versions from support brackets to a cube design.

Mechanical designs in the product range (by impeller diameter)

Robust and stable: RadiPac in cube design

The RadiPac cube variants are designed for installation with a horizontal shaft. This mounting position allows the RadiPac to be mounted on spring or rubber vibration elements in order to decouple vibration. Moreover, the design is stackable and easy to handle. There are also advantages in terms of sustainability, as packaging material is not required, and must therefore not be disposed of afterwards.

Benefits to you

  • Easy handling during transport and installation
  • Allows vibration decoupling
  • Protects the motor system and impeller
  • Installation with horizontal AND vertical motor shafts
  • Optimised, ex-works positioning of the nozzle
  • No need for packaging material or its disposal

Quiet operation: RadiPac in support structure design

The support structure variant is also designed for installation with horizontal shafts and allows the fan to be decoupled from its surroundings.

Benefits to you

  • Allows vibration decoupling
  • Optimised, ex-works positioning of the nozzle

Quick mounting: RadiPac in support bracket design

The unit can be hung directly on the device wall with the pre-mounted nozzle plate: quickly, safely and with little effort.

Benefits to you

  • Quick and easy installation
  • Streamlined
  • Installation with horizontal and vertical motor shafts
  • Optimised, ex-works positioning of the nozzle