EC medium pressure axial fans

GreenTech EC technology in a new dimension: EC medium pressure axial fans

Thanks to the new axial fans, our highly efficient GreenTech EC technology is now available for the first time for the medium pressure range. Not only does this create new possibilities, it also makes things easier.

Comparison: Conventional fan with VFD vs. GreenTech EC fan

With the EC medium pressure axial fans from ebm-papst, you get …

… a complete system, consisting of a motor, impeller and integrated variable speed drive. All from one source and ready configured. That means no extra components and simple commissioning. Standardized measurements and clear documentation are available.

… high adaptability. Because different operating points can be set by way of speed adjustment. The system can also be mounted in any desired orientation.

… high efficiency. This is ensured thanks to the GreenTech EC motor in combination with the integrated variable speed drive.

… an integrated derating function. The perfect protection against overheating and mechanical overload.

Areas of application for EC medium pressure axial fans

Shock freezers with EC medium pressure axial fans by ebm-papst

Medium pressure axial fans with GreenTech EC motors are used wherever high volume flows need to be moved against elevated pressures. Examples of this include shock freezers or cold storage facilities, as well as process cooling applications.

EC medium pressure axial fans: Top of the class in efficiency

In the USA, the IE3 efficiency class (premium efficiency) is already obligatory. The good news is that GreenTech EC motors from ebm-papst already exceed this class and even the proposed IE4 efficiency class (super premium efficiency) today. This gives you perfect planning security for many years to come.

Efficient also means cost-effective. In addition, the fan speed can be adjusted to requirements, meaning that you only use the energy that you really need.

EC medium pressure axial fans: Continuously cost-effective

The adjustment of the air flow to the current requirements is a decisive factor for a system’s energy consumption. For AC fans, this is often achieved by switching individual fans on or off. In contrast, GreenTech EC fans have an integrated variable speed drive, which can be used to adjust the air mass to requirements. When the fan speed n is reduced, the input power Pe decreases drastically (P~n³).

A simple sample calculation makes the enormous potential for savings clear: A system with four fans arranged in parallel consumes 40 kW in rated operation. If this system is operated over one year, with an average of half the time in the design point and the other half of the time at half the rated air flow, this results in energy savings of 65 MWh per year.

Benefits of EC medium pressure axial fans at a glance

Double-flange housing

  • Low noise emissions
    • Inlet ring shape integrated on the intake side
    • Precise roundness ensures minimal air gap
  • High efficiency
    • Inlet ring shape integrated on the intake side
  • Robust design
    • Hot-dip galvanized steel sheet
  • Safe handling during transport and installation
    • Transport loops
    • Housing covers motor system and impeller completely
  • Flexible installation
    • Installation with horizontal and vertical motor shafts
    • Installation on intake and pressure side

Terminal box (optional)

  • Accessible from outside
    • Easy access to connections and interfaces
  • Simple wiring
    • Ample connection space


  • Ideally adjusted
    • The blade angle and number of blades are optimally matched to the motor and the control electronics at the factory
  • Low vibration
    • Impeller rotor unit dynamically balanced in two levels
    • High balance quality
  • Robust design
    • Die-cast aluminum blades
    • Die-cast aluminum hub
    • Proven blade geometry (airfoil)

GreenTech EC motor

  • Low noise emissions
    • Commutation and stator design ensure quiet running
    • Acoustically imperceptible clock frequency
  • Long service life
    • Maintenance-free ball bearings
    • Brushless commutation
  • Unrivalled compactness
    • The impeller is mounted directly onto the motor rotor
  • High efficiency
    • Low copper and iron losses in the stator
    • Use of permanent magnets means no magnetization losses in the rotor
    • No slip losses thanks to synchronous running
  • Economical operation
    • Enables optimized commutating partial-load operation up to 1:10 while still maintaining high efficiency
  • Safe operation
    • Insulated bearing system to avoid bearing currents


  • Simple putting into service
    • Central terminal connection area for power supply, alarm relay, control and communication
    • Spatial separation of the connection area from the motor electronics
    • High-quality terminal clamps
    • Pre-set operating parameters
  • Versatile
    • Continuously variable speed settings
    • 0–10 VDC/PWM interface and MODBUS RTU
    • Integrated PID controller
  • Universal applicability
    • Various voltage types for worldwide use
    • Suitable for 50 and 60 Hz supply frequency
  • Safe operation
    • Integrated derating function
    • Integrated locked rotor and over-temperature protection

Motor mount

  • Robust design
    • Hot-dip galvanized welded design

Intake/pressure side guard grille (optional)

  • Safety
    • Contact protection in line with DIN EN ISO 13857
  • Noise optimization
    • Large spacing between the guard grille and the impeller
  • Robust design
    • Hot-dip galvanized steel