Reasonable bellmouth design, with low noise, big air volume, strong ventilation strength and low running cost;  

Imported bearing has high strength, low noise and durability;  

It adopts air fair current principle composite pvc shutter or aluminum shutter with antioxidant, light weight, no deformation, easy closing and opening, and prevents backflow of air;  

High-strength reinforcing bar aluminum-magnesium alloy belt pulley has light weight and high strength and high toughness;  

6 pieces of stainless steel blades have no deformation and crack, beautiful and durable;  

There are both vertical and inclined air fans, which could effectively satisfy different sites' demands;  

It is configured with the energy-saving motor and passes the 3C certification with the protection grade: IP55, insulation grade: Grade F;