This black square shutter exhaust fan delivers 2000 CFM to quickly expel stale air, floating dirt, heat, and smells, keeping indoor air fresh in sheds, workshops, and attics. The intelligent controller features temperature and humidity triggers, offering up to 10 speed settings that automatically adjust to changing conditions, along with multiple modes, timer, and alarm for full control. Powered by an 80W premium EC motor at 1500 RPM, it provides up to 7.2 m/s airflow while running smoothly with low noise, making it ideal for year-round attic ventilation. The all-metal steel construction offers high rigidity, deformation resistance, and handles damp and rain, providing greater durability than plastic alternatives and ready for harsh weather. The louvered design opens when the fan runs and closes automatically when off, preventing backdraft and keeping out pests and debris. This exhaust fan is perfect for removing heat buildup in attics, clearing dust in workshops, and preventing moisture damage in sheds.