12" 40W 705CFM Shutter Exhaust Fan,Low Noise 64dB,Pure Copper EC motor,Voltage 12V,10-speed PWM speed regulation,Wall Mount Ventilation and Cooling for Sheds, Attics, Workshops, and Greenhouses

10" 15W 400CFM Shutter Exhaust Fan,Low Noise 58dB,Pure Copper EC motor,Voltage 12V,10-speed PWM speed regulation,Wall Mount Ventilation and Cooling for Sheds, Attics, Workshops, and Greenhouses

12" 25W 550CFM Shutter Exhaust Fan,Low Noise 62dB,Pure Copper EC motor,Voltage 12V,10-speed PWM speed regulation,Wall Mount Ventilation and Cooling for Sheds, Attics, Workshops, and Greenhouses