H. Östberg
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TKV 660 B3 Updated: 2025-06-04

7351075 - TKV 660 B3 Black 7351085 - TKV 660 B3 Black C4
Archived product

Product marked with this symbol has an AC motor. An induction motor is an electric motor were the rotor speed is asynchronous with the input voltage frequency. This product is compliant with the Lot 6 directive (1253/2014) and approved for use in the EU and EFTA, also after 2018.

  • Roof fan with square connection.
  • Vertical outlet.
  • High performance and proven reliability.
  • Impeller with backward curved blades.
  • The external rotor motor has maintenance-free sealed ball-bearings.
  • Integrated motor protection.
  • Junction box has enclosure class IP 54.
  • For speed control a transformer can be connected.
  • Fan housing is manufactured from galvanized sheet steel and is polyester plastic coated. Can be ordered uncoated or with coating that complies with the Environmental class M3/Corrosion class C4.
  • Swing-up design to simplify maintenance and cleaning of the impeller.
  • The easiest way to mount the roof fan is with a roof curb TFU.