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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
|
Model |
LX-NPV300 |
LX-NPV600 |
LX-NPV900 |
|
Ventilation Capacity |
800 |
2,500 |
5,000 |
|
Diameter |
300 |
600 |
900 |
|
Weight |
5.2 |
12.8 |
22.4 |
|
Wind Load |
150 km/h |
150 km/h |
130 km/h |
|
Temperature Range |
-30°C to +120°C |
|
|
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
|
Feature |
Traditional Louver |
Powered Fan |
Longxuan Turbine |
|
Energy Use |
None |
0.5-2 kW |
None |
|
Continuous Operation |
No |
Yes |
Yes |
|
Noise |
N/A |
60-75 dB |
<35 dB |
|
Lifetime |
5-8 years |
3-5 years |
15+ years |
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
No Power Roof Fan Customer Evaluation
No Power Roof Fan FAQ
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How does the No Power Roof Fan work?
It operates automatically using natural wind power and indoor-outdoor temperature difference (thermal buoyancy), rotating continuously to achieve ventilation and heat dissipation.
-
Does this fan need electricity or maintenance?
No electricity is needed at all. It has a bearing design with low friction and generally requires only regular simple inspection, almost no maintenance.
-
Can it work on non-windy days?
Yes. Even without wind, indoor heat and air pressure difference will drive it to rotate slowly and maintain basic ventilation.
-
What materials are used for the No Power Roof Fan?
It is mainly made of corrosion-resistant FRP, stainless steel or galvanized material, suitable for outdoor and industrial environments.
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Maintaining industrial cooling systems is critical for operational efficiency and equipment longevity. A professional cooling tower treatment strategy is not just about cleaning; it is about preventing scale buildup, corrosion, and the growth of harmful microorganisms. Without proper management, these systems can suffer from reduced heat transfer efficiency, leading to higher energy costs and potential system failures. In this guide, we will explore the essential components of water treatment, the chemistry involved, and how to optimize your cooling tower for maximum performance and sustainability.
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