The Palram - Canopia Automatic Louver Window Opener for Palram - Canopia greenhouse was designed to automatically control the temperature and provide additional ventilation in all Palram - Canopia Greenhouses. As the air inside the greenhouse warms, the vent gradually opens to allow the correct amount of air flow into the greenhouse and closes when the optimal temperature is reached. The Palram - Canopia vent arm was designed with the use of natural minerals that expand with heat to push a piston, which raises the window, as the air gets warmer than contracts as it cools, closing with the use of a spring.Note: This product may require up to 2 additional days for order processing prior to shipping

For additional information on this product, please see the Product Documents section for all downloadable user manuals, installation guides, brochures and warranty statements.