KVB/FCentrifugal Fans

High performance, hard-wearing box fan support for industrial use

  • F400 (400ºC/120 min)

  • Energy-Conscious

  • Flexible

  • Compliant

F400 (400ºC/120 min)

400°C/2h, belt-driven double inlet extractor fan units, to operate outside the fire risk zone.

Weather Resistant

The KVB’s Aluzinc panelling provides weather-resistant protection.


The unit’s robust design makes it ideal for demanding industrial environments with heavy usage.


The range can be deployed across a number of commercial and industrial sectors.

The KVB line of box fans supports ventilation and extraction in demanding commercial and industrial environments. Each unit is belt-driven and uses a double-curved, galvanized steel impeller. This is supported by an IP55 compliant three-phase IEC motor to provide energy efficiency and performance.

The unit is housed in robust steel with a galvanized Aluzinc 185 single skin coating and is fully BSI certified. This makes it suitable for intensive use in a range of industrial and commercial environments such as kitchens, garages, theatres, malls, or other compliant locations.

The range is also categorised IP55 insulation class and can be installed in an existing system, and enjoys a maximum operating temperature of –20 °C to 100 °C. This can also be expanded through the Systemair accessory line which includes rain protectors, switches, and more.