The Rotowent Dragon chimney cowl is a device, which, in a dynamic way, uses the force of the wind to increase chimney draught, and prevent downdraught. The cap always places itself in the opposite direction to the wind no matter of its strength or direction. It can be mounted on gravitation based chimney ducts, ventilation, flue and smoke.
The special patented rotating system has ball bearings, which are uniquely placed outside of the cap, enabling the Dragon to withstand temperatures up to a massive 500°C.
This high working temperature enables the Dragon to be used on wood burning stoves, even on short bungalow chimneys.
Please note that the Dragon Cowl is not suitable for use when appliances are used for slumbering solid fuels (smokeless) and coal.
The literature that comes with the Dragon cowl states that the cowl is supplied with 2 fins. This is incorrect. The cowl is supplied with just one fin, the wind, as shown in the images.
Inlet Diameter:- 244mm
Force In Tabs Diameter- 259mm
Base Material:- chrome - nickel sheet 1.4301
Cap Material - chrome - nickel sheet 1.4404
Max Working Temperature:- 500°C
Rotation system:- high temperature ball bearings placed outside of the cap.
Dragon Revolving Cowl Brochure
Excellent bit of kit Does exactly what it says on the tin, solved problems we've had with a south Facing Chimney for the past 10 years - highly recommend. Quick delivery - Great service (10/02/2017) Pete Morley - South Yorkshire
Great Design Nothing can touch the Dragon when it comes to temperature. The bearing is on the top of the cowl, away from soot and high temperature fumes, so it can withstand a massive 500°C. It doesn't revolve, but it positions itself with the opening in the opposite direction from prevailing winds. (06/05/2011) fluesystems.com - High Wycombe
Delighted with our purchase of two Dragon Flues,solved a problem with wind knocking out water heaters and after spending hundreds to try & find a solution. Wish we had found them sooner.Fantastic,Many Thanks.Maintenance Manager (10/08/2012) Hilton Hotel -