Window mount fan. Electric shutter series. High pressure exhaust type. Window mounting. Rain proof and wind resistible. Single speedHigh performance propeller fan Air volume = 445 m3/h. Exhaust louver type. The fan shall be suitable for window mounting. Condenser motor with thermo cut-off. Lubricated sintered bush for long life operation. High performance propeller fan adopted sustains static pressure. Hood structure prevents ingression of rain water. Bended end structure of shutter blocks the back flow of outside wind. Unique mounting brackets allow easy installation with simple steps in few minutes. Electrically operated shutter ensures sufficient opening for airflow during operationFront louver attached enhances safety protection. Recommended glass thickness =3mm to 25mm Installation hole size =247mm ~ 250 mm.