Darco system

Ø 150 -Ø 300

Cowl designed esspecialy for smoke ducts.. It uses wind to increase chimney draught in most efficient way.

Self-adjusting chimney cowl Rotowent DRAGON 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 ducts endings: flue (gas, oil) and smoke. Thanks to the special, patneted, rotating system with ball bearings placed outside the cap, it can withstand very high temperatures, which can be achieved in wood or coal burning stoves.


  • 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) smoke chimney draught


to be used fireplace

coal stoves

gas and oil boilers

wood stoves

pellet soves

do not use on coal based fuel

Available diameters: 150, 180, 200, 250, 300 [mm]
Base versions: See catalogue card*
Material versions: See catalogue card*
Max working temperature: 500 [ºC]
Bearing system: ball bearings sunk in high temperature grease
Warranty: 2 years

* Catalogue card is available in “Download” tab.