Rotating chimney cowl with ball bearings Ø200, acid-resistant steel (inox)

Chimney and ventilation duct termination for better draft

The rotating chimney cap Ø200 is intended for finishing gravity ventilation ducts and chimneys. As the dome rotates, the wind creates negative pressure in the duct, and the pressure difference helps draw air out of the building.

Main advantages

• Automatic wind-based rotation the dome turns itself according to the wind direction, so ventilation works regardless of the wind direction.
• Assistance with weak draft it is recommended in case of weak or no draft, too short a chimney, turbulence, or when the chimney is lower than the roof ridge.
• Duct protection the cap protects the duct against precipitation and draft disturbances.
• Acid-resistant stainless steel it is made of 1.4404 steel, which is suitable for more demanding roof conditions.
• Quiet and long-lasting operation the rotor rotates on ball bearings operating in oil.
• Option with base a version with a square 315 mm mounting plate with a ring is also available.

Use and installation

The cap is suitable for finishing gravity ventilation ducts and chimneys, especially in cases where the draft is weak or absent, when the chimney is too short, in turbulence, in a house among trees or in a valley, and when the chimney is lower than the roof ridge. It is not suitable for chimneys in which coal is burned, including pea coal.

The nominal diameter is 200 mm, and the inner sleeve diameter is 201.5 mm. The cap can be installed directly on the duct with the sleeve or on the base. The version with base has a square 315 mm mounting plate with a 90 mm high ring, fixed to the chimney top with 4 screws.

Frequently asked questions

How does the rotating cap improve ventilation performance?

The wind turns the dome and creates negative pressure in the duct. Due to the pressure difference, air is drawn out of the building through the duct.

Does the cap work regardless of wind direction?

Yes. The dome turns itself according to the wind direction, so ventilation works independently of the wind direction.

Is it suitable for all chimneys?

It is not suitable for chimneys in which coal is burned, including pea coal. Data for other fuel types are not provided.

Conclusion

The rotating chimney cap Ø200 made of acid-resistant stainless steel 1.4404 is a practical solution for duct protection and draft assistance in gravity ventilation ducts or chimneys. Warranty 2 years.