Industrial & Commercial Roof Ventilator Series

Roof ventilators feature a wide range of specifications and configurations with broad application versatility, allowing for precise fan selection based on varying system demands for pressure, airflow, and noise levels.

1.Axial Roof Ventilators: Suitable for low-pressure, high-volume application scenarios. According to user requirements, they can also be engineered as bi-directional reversible designs, delivering equal performance in both supply and exhaust modes.

2.Centrifugal Roof Ventilators: Suitable for scenarios requiring smaller airflow volumes paired with higher static pressures.

3.Unpowered Turbine Ventilators: Suitable for exhaust and ventilation in commercial buildings and industrial facilities (particularly light steel structure roofing).

All types of roof ventilators offer high efficiency and low noise levels. Ventilators of identical diameters utilize varying rotational speeds, blade pitch angles, and blade profiles to meet different operating conditions, achieving optimal fan-system matching to maximize energy savings and noise reduction. They feature smooth operation and long service life. With low rotational inertia and high dynamic balancing accuracy, the operational performance indicators under factory internal quality standards surpass general fan industry standards, ensuring long-term stable operation. Based on application requirements, these fans can be manufactured in explosion-proof or anti-corrosion configurations, making them suitable for anti-aging applications and for exhausting flammable, explosive, or corrosive gases.

Axial roof ventilators are available in model sizes ranging from φ300 to φ2400 mm. Centrifugal roof ventilators offer model sizes including φ300 to φ1000 mm and φ280 to φ800 mm. Unpowered turbine ventilators are available in No. 5# and No. 6.8# standard sizes, with custom sizing available upon request.

Each ventilator assembly consists of components including the impeller, casing/housing, weather hood, drive components, gravity dampers, and safety guard nets. For roof supply and exhaust applications with pressures exceeding 600 Pa, centrifugal fans should be adopted; for pressures between 400 Pa and 600 Pa, mixed-flow fans should be adopted; for pressures below 400 Pa, axial fans should be adopted. In scenarios with strong natural wind conditions or significant indoor-outdoor temperature differentials, unpowered turbine ventilators can be selected.

Axial Roof Ventilator Outline Drawing and Installation Dimensions

Unpowered Turbine Ventilator Performance Parameter

Unpowered turbine ventilators break away from traditional design modes, utilizing curved blades driven by natural airflow. They operate smoothly using only indoor-outdoor temperature differentials and light breezes without requiring electricity, representing a major breakthrough in ventilation engineering. The guide vanes rotate synchronously with the blades to accelerate air velocity and increase exhaust capacity, lowering installation costs and enabling energy-free operation. Operating without electrical power eliminates the risk of electrical short circuits and overload hazards; in the event of a fire caused by other factors, the ventilator rapidly exhausts smoke to expand evacuation space and time.

Unpowered turbine ventilators extract indoor hot exhaust air to immediately lower indoor temperatures and create a thermal pressure differential, allowing an equivalent volume of cool outdoor fresh air to be drawn in, continuously cycling to accomplish effective ventilation.