Rotatable longitudinal nozzle Ø150 stainless steel NOP150N

Functional Protection and Improvement of Ventilation Draft

The 150 mm diameter longitudinal rotating cowl is an element that significantly impacts the efficiency of a gravity ventilation system. Its primary function is to create negative pressure within the duct, supporting chimney draft even in weak wind conditions. Thanks to the rotating mechanism, the device responds to wind direction, preventing backdraft phenomena that can cause flue gases or moisture to flow back into the building. At the same time, the "longitudinal" design effectively protects the ventilation opening from atmospheric precipitation – rain or snow – which is crucial for maintaining a dry and efficient ventilation system year-round.

Durability and Resistance to External Conditions

A key advantage of this model is the material used. The manufacturer employed stainless steel sheet, which in practice means significantly higher corrosion resistance compared to standard aluminum or galvanized solutions. This material choice ensures the cowl easily withstands aggressive atmospheric factors and any chemical compounds present in flue gases. The 0.6 mm sheet thickness provides structural rigidity, while the use of ball bearings immersed in oil guarantees smooth rotation even after many years of operation without the need for maintenance. This maintenance-free solution is particularly effective in areas with variable wind directions or high wind loads.

Application and Installation

The device is dedicated to ventilation ducts with a nominal diameter of 150 mm. Installation is performed by screwing the base, measuring 250x250 mm, to the face of the chimney or exhaust pipe; the mounting hole spacing is 195x195 mm, facilitating precise alignment during installation. This is a universal product suitable for both new installations and the modernization of existing ventilation systems in residential and public buildings.

Thanks to the combination of a solid structure with rust-resistant material, this cowl provides durable protection for the ventilation duct, eliminating the risk of water flooding the channel and improving thermal comfort and resident safety by stabilizing chimney draft. It is worth noting its chemical resistance and the manufacturer's 5-year warranty, which confirms the high quality of the engineering solutions applied.