Self-adjusting chimney cowl Rotowent TWISTER 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.

Maximal working temperature: 400 [oC]
Rotation system: slide bearings