Rotowent on ball bearings

Classic chimney cowl used for ventilation, can be made with very big diameters.

Classic chimney cowl with ball bearing system.


no electricity

2 years warranty

 product  protected



Self-adjusting chimney cowl Rotowent on ball bearings is a device, which, in a dynamic way, uses force of the wind to increase chimney draught. The cap always places itself in the opposite direction to the wind no matter of its strength or direction.

It is to be mounted on gravitation based chimney ventilation ducts endings.

Technical data

Available diameters: 150, 200, 250, 300, 350, 400 [mm]
Base versions: See catalogue card
Material versions: See catalogue card
Max working temperature: 150 [ºC]
Bearing system: ball bearings
Warranty: 2 years




  • when there are wind fluctuations on the chimney duct ending, caused by its bad location
  • when there is an unfavorable terrain configuration, with strong and frequent winds
  • when there is a lack of chimney draught or it is too weak
  • in order to improve the natural (gravitation) ventilation




do not use on gas and oil boilers

do not use on wood stoves

do not use on coal stoves

do not use on coal based fuel





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