【Ventilation Fan: Airflow】720CFM, Ventilation type: Air out. This greenhouse fan features a double ball bearing outer rotor brush-less motor With this exhaust fan, you can exchange the indoor air, improve room air quality and balance the humidity. 【DURABLE CONSTRUCTION WALL WINDOW EXHAUST FAN, VERSATILE USE】Longer Lifespan - Made with premium quality metal materials, the quiet cool attic fan is resistant to moisture, high temperature, corrosion, and foreign matter; The sturdy shell provides a stable working environment for the motor of the ventilation fan, ensuring its durability and reliability Wide Application - This vent fan is suitable for a variety of use scenarios, including kitchens, bathrooms, garages, basements, and other environments that require constant ventilation, bringing you a more comfortable and refreshing living environment 【CUT COOLING COSTS】 Reduce expensive cooling bills at home. Ready to install, our wall-mounted vent fan is designed to help remove excess heat and moisture, to keep your living space cooler and more comfortable year-round. 【Customer Service】Our provides 24-hours professional customer service. If you have any questions, please feel free to contact us. We appreciate to improve from your suggestion. Window Ventilation Fan