Frp fan features: Frame: glass fiber material, acid and corrosion resistance. Forming one, effectively reducing the metal resonance. Motor: special design and manufacture of aluminum housing motor, light weight little vibration low noise also has a waterproof+dustproof+corrosion resistant+energy saving+high performance+high efficiency and long life; can operate in adverse circumstances, while ensure maximum efficiency. Fan blade: steel and cast aluminum materials, and reasonable design of leaf angle, can get the maximum air flow, and also has very low noise; weather resistance; long term use of the drastic changes in temperature environment, no degeneration+no brittle and nondiscolouring; corrosion resistance and high intensity. Shutter: pvc material, anti-uv+anti-aging and no photopermeability. Design: scientific and reasonable design of frame and horn mouth, improve exhaust air quality efficency. 1460*1460*930mm, 70kg/piece.