4m Low Noise High Volume Low Speed Commercial Fan Big Size Hvls Ceiling Fans

4m Low Noise High Volume Low Speed Commercial Fan Big Size Hvls Ceiling Fans. Energy Efficient Direct Drive: Brushless DC motor with high torque and first-class energy efficiency. Ultra-Low Noise Operation: Noise level as low as 40-45 dB, suitable for cinemas and quiet spaces. Aviation-Grade Blade Material: Aluminum magnesium alloy blades made of aviation material, bend-resistant. Comprehensive Safety System: Five insurance layers including anti-fall plates and 1000KG steel wire locks. Stable Performance: 100% stable performance without vibration, using imported 3 bearings.