300mm Shutter Exhaust Fan,Speed Controller,1350m³/h,Automatic Metal Louvers

POWERFUL AIRFLOW FOR LARGE SPACES – Delivers up to 1350 m³/h of airflow at 1600 RPM. Suitable for rooms of 15-25 square meters, including workshops, garages, attics, and warehouses. Quickly renews indoor air and keeps your space fresh.
STEPLESS SPEED CONTROL FOR CUSTOMIZED VENTILATION – Equipped with a rotary knob speed controller that allows continuous adjustment from gentle breeze to maximum airflow. Low speed for quiet daily ventilation; high speed for rapid air exchange when needed.
AUTOMATIC LOUVERS FOR ALL-WEATHER PROTECTION – Louvers open automatically when powered on and close by gravity when powered off. This design prevents rain, dust, insects, and debris from entering through the wall opening. Ideal for exterior wall installation.
DURABLE AND WEATHER-RESISTANT CONSTRUCTION – Made from zinc steel plate substrate with a powder-coated finish. Resists harsh conditions including coastal humidity and winter weather. The gray finish blends discreetly with building exter