The Palram - Canopia Rion Side Louver Window is designed to improve air circulation and help control the temperature in all Rion greenhouses. The shutters are controlled manually for variable airflow to aid in cooling on warmer days. When paired with the roof vent, the louver window can provide improved air circulation. The Palram - Canopia Rion Side Louver Window can be fitted with an Automatic Louver Window Opener to provide the ideal airflow into the greenhouse.