Rotating chimney cowl with ball bearings Ø300, acid-resistant steel (inox)

Rotating cowl for finishing a chimney or ventilation duct

The rotating chimney cowl Ø300 is intended for finishing gravity ventilation ducts and chimneys. Wind creates negative pressure in the duct, and the pressure difference extracts air from the building, so the cowl helps ventilation operate even in more demanding conditions.

Main advantages

• Automatic rotation according to wind. The dome turns by itself according to the wind direction, so ventilation works regardless of wind direction.
• Ball bearings in oil. The rotor turns on ball bearings that operate in oil, which enables long-lasting, quiet operation without failures.
• Acid-resistant stainless steel. The cowl is made of acid-resistant stainless steel 1.4404.
• Duct protection. It protects the duct against precipitation and draught disturbances.
• Assistance with weak draught. It is recommended with weak or absent draught, a too short chimney, turbulence, in a house among trees or in a valley, and when the chimney is lower than the roof ridge.
• Mounting on a duct or base. It can be installed directly on the duct with a sleeve or on a base.

Use and installation

The cowl is suitable for finishing gravity ventilation ducts and chimneys. The nominal diameter is 300 mm, and the inner diameter of the sleeve is 301.5 mm, so before selecting, check the suitability of the chimney or duct.

Installation is possible directly on the duct with a sleeve or on a base. A version with a base is also available, which has a square mounting plate 450 mm with a ring 90 mm high and is fastened to the chimney head with 4 screws. The cowl is not suitable for chimneys in which coal or pea coal is burned.

Frequently asked questions

Does the cowl work if the wind changes direction?

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

How is the cowl installed?

It can be installed directly on the duct with a sleeve or on a base. The version with a base is fastened to the chimney head with 4 screws.

Is it suitable for a chimney in which coal is burned?

No. The cowl is not suitable for chimneys in which coal or pea coal is burned.

Conclusion

The rotating chimney cowl Ø300 is a practical solution for finishing a chimney or gravity ventilation duct, with protection against precipitation and draught disturbances. The product comes with a 2-year warranty.