12″/14″/16″/20″ Shutter Exhaust Fan with Speed Controller Shed Garage Wall Mount

【High-Efficiency EC Motor】 Utilizes an advanced EC copper core motor with dual ball bearings, providing exceptional airflow and speed to ensure effective heat dissipation, dehumidification, and deodorization. It can withstand long-term, high-intensity use, operating stably, quietly, and efficiently. 【Intelligent Control】 Intelligent automation design offers 10 adjustable fan speeds, precise temperature and humidity control, and a touchscreen controller for timed or cycle settings, providing convenient and intelligent operation. 【Automatic Silent Operation】 This exhaust fan features automatic aluminum alloy louvers with an operating noise level ≤70 decibels. It operates quietly, automatically opening and closing to effectively block dust, debris, and insects. 【Durable and Long-Lasting】 Cons.