No Power Roof Fan

1.​Product Overview​​

Non-powered roof ventilators are ​​energy-free ventilation solutions​​ that utilize wind energy and thermal buoyancy to continuously exhaust hot air, fumes, and moisture from buildings. Longxuan's turbine ventilators feature ​​360° omnidirectional operation​​ with wind speeds as low as ​​0.2 m/s​​, providing ​​24/7 ventilation without electricity costs​​.

2.​​Core Technology & Design​​

1.Wind-Driven Turbine Mechanism​​

​​Stainless steel ball bearings​​ ensure smooth rotation even in low-wind conditions

​​Aerodynamic curved blades​​ capture wind from any direction, increasing airflow efficiency by ​​40%​​ compared to static vents

2.Thermal Stack Effect Enhancement​​

​​Double-wall construction​​ creates a chimney effect, boosting hot air exhaust when ΔT ≥5°C

Aluminum/304 SS housing​​ reflects solar radiation to prevent heat buildup

3.Weatherproof Construction​​

​​IP54-rated​​ base flashing (standard EPDM rubber, optional lead-free aluminum)

Bird/insect-proof​​ stainless steel mesh (2mm aperture)

3.​​Technical Specifications​​

​​4.Installation Advantages​​

✔ ​​Universal Mounting​​: Compatible with metal, concrete, and membrane roofs (slope 5°-45°)

✔ ​​Zero Maintenance​​: Self-lubricating bearings (10+ year lifespan)

✔ ​​Corrosion Resistance​​: 316L stainless steel hardware for coastal areas

5.​​Performance Comparison​​

6.​​Applications​​

◼ ​​Industrial​​: Factories, warehouses, workshops

◼ ​​Agricultural​​: Poultry farms, greenhouses, grain storage

◼ ​​Commercial​​: Parking garages, shopping malls, restaurants

◼ ​​Residential​​: Apartment buildings, attic ventilation

7.​​Installation Guidelines​​

​​Spacing​​: 1 unit per 50-80 m² of roof area

​​Height​​: Minimum 0.5m above parapet for optimal airflow

​​Complementary Systems​​: Pair with ​​eave intake vents​​ for cross-ventilation

​​Warranty​​: 5 years on turbine assembly, 2 years on flashing