The FM3009-Y-2-S-2 is a cross-flow (or “air curtain”) unit designed to create an invisible barrier of air across doorways or openings. It helps to reduce infiltration of outside air (dust, insects, pollutants) while maintaining indoor climate control, thus improving energy efficiency. The unit features a double air-way deflector design to produce an even, uniform airflow. The casing is constructed of metal with fire resistance, while the air wheel (fan) is made of high-strength fiberglass or plastic for durability in moist or pollutant environments. The unit is designed for ease of installation, quiet operation, and low maintenance.