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Centrifugal roof fan VENTS VKH EC series

Centrifugal roof fan VENTS VKH EC series
Centrifugal roof fan VENTS VKH EC series
  • Model VENTS VKHA EC (aluminum).
  • Model VENTS VKHz EC (galvanized steel).

Centrifugal roof fans in the steel casing with the horizontal exhaust of air and the air capacity up to 11400 m3/h. Designed for exhaust ventilation systems.

Voltage / frequency:


Products in this series (8)

Series and modification   Casing material   Turbine standard size   Motor type
VENTS VKH – vertical air exhaust   _ steel with polymeric coating
A –
z –
galvanized steel
  250; 280; 310; 355; 400; 450; 500; 560   ЕС – electronically
synchronous motor
ErP data  
Overall efficiency η,[%]
Measurement category MC
Efficiency category EC
Efficiency grade N
Variable speed drive VSD
Power [kW]
Current [A]
Air flow [m3/h]
Static pressure [Pa]
Speed [n/min-1]
Specific ratio SR

The fans are rated for exhaust ventilation and air conditioning systems for various premises that require reasonable energy saving solutions and controlled ventilation systems. EC motors reduce energy demand by 1.5–3 times and ensure high performance combined with low noise operation. Such characteristics are especially important for application in public premises as banks, supermarkets, restaurants, hotels, residential premises or domestic spaces, including water pools.


The fan casing is made of polymer-coated steel (VKH EC model), aluminum (VKHA EC), galvanized steel (VKHz EC).


The fans are equipped with high-efficient electronically-commutated direct current motors with external rotor and impellers with backward curved blades. EC motor is free of friction and wear parts as a commutator and brushes. These components are replaced by a maintenance-free electronic circuit board. EC motors are featured with high performance and well controllable speed range. Premium efficiency reaching 90% is a definite advantage of electronically commutated motors.

Integrated functions and control

The fan is controlled by an external 0-10 V control signal. The fan capacity is regulated depending on temperature and pressure level, smoke content, etc.

The fan has low energy consumption at any speed. Maximum fan speed does not depend on the available current frequency and is suitable for operation both at 50 and 60 Hz. Several fans can be integrated into a single computer-driven control system. Custom designed software provides high accuracy control of the fans integrated into a network. The LED-display of the computer shows all the system parameters and the operation mode can be set individually for each fan in the network.


VKH…EC fans are designed for mounting on the roof. The mounting plate enables the fan installation on a level surface directly above a ventilation shaft or air duct and the holes on this mounting plate provide reliable rigid fixing of the fan to a static surface. While mounting the VKH...EC fans to the level surface provide a support to exclude possible water or snow ingress into an exhaust vent of the respective ventilation shaft. While installing the fan provide enough space for maintenance works.

For connection of the fans to round air ducts use the following accessories: KKV damper, GKV flexible connector, FKV counter flange. For mounting of the fans to flat surface use the mounting frame RKV.

Mounting example

VENTS VKH EC fan store roof ventilation example


Please, feel free to contact us.


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  • SR series (round)

    SR series (round)

  • KOM series

    KOM series

  • Speed controller R-1/010

    Speed controller R-1/010

  • SRF series

    SRF series

  • GKV series

    GKV series

  • KKV series

    KKV series

  • Mating flange FKV

    Mating flange FKV

  • Mounting frame RKV

    Mounting frame RKV

  • Mounting frame RKVI (insulated)

    Mounting frame RKVI (insulated)