A high-performance, 2-speed commercial AC window fan, suitable for single or double-glazed windows up to 25mm thick. Features a totally enclosed external rotor motor for constant airflow, even in gusty conditions, and a silent electro-thermal backdraft shutter. The fan is reversible and has a safety finger guard integrated into the housing and window grille. Installation is made easy with Xpelair's unique metal ladder strip/screw system for a secure and watertight seal. Ideal for offices, factories, schools, shops, pubs, restaurants, and kitchens. Includes instructions, screws, and raw plugs. Operates at 220-240V, max 41W, with a sound level of 50/55dBA at 3m and airflow of 543/636m³/hr. Dimensions for GX12 are 408 x 308 x 168mm.