| Model NO.:HQ-300 | Material:Stainless Steel | 
| Blade Material:Stainless Steel | Type:Exhaust Fan | 
| Electric Current Type:Wind Driven, No Power | Mounting:Roof Fan | 
| Certification:ISO | 
Advantages
1. Automatically operate. Take advantage of energy from nature, exhausting turbid, humid hot air to exterior and supplying fresh air to interior. Produce air convection as a heat radiator, reducing indoor temperature, increasing air fresh. Reduce air conditioning load, increasing the cooling effect.
2. No operating cost, no electricity consumption, environmental protection, energy-saving
3. No maintainance needed, life-long service
4. Light weight, strong and durable construction
5. Weather resistance, strong fray resistance, fine non-viscidity, self-cleanness, high revolving sensitivity and high air venting efficiency.
6. Easy installation. Installation Position: Flat roof, pitched roof, concrete roof and contour plate of various industrial plants.
Roof ventilation fan without power
| Model | Throat opening caliber(mm) | Outside diameter of turbine(mm) | Turbine height(mm) | Inlet air speed(m/s) | Air volume(m3/h) | Weight (kg) | Material | 
| HQ-500 | 500 | 630 | 350 | 3.4 | 2520 | 8.5 | Stainless steel | 
| HQ-600 | 600 | 730 | 420 | 3.4 | 3600 | 1.1 | Stainless steel | 
 
  
  
 
 
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