Compatible with any Palram Canopia Rion Greenhouse side louvre window, the Palram Canopia Rion Automatic Side Louvre Window Opener helps optimise the temperature in your greenhouse, even when you’re not around.This intelligently-designed greenhouse accessory opens and closes the side louvre window according to the temperature inside your greenhouse. It operates using a piston and spring, and there’s no need to connect to an electricity supply for it to work.The heat-activated arm is designed using wax, which contracts and expands as the temperature inside the greenhouse changes. The arm begins opening the louvre window at 12-15C, and then closes it as the temperature falls.Simple to instal and supplied with a reassuring 1-year warranty, this greenhouse automatic window opener is compatible with any Palram Canopia Rion Greenhouse that is fitted with a side louvre window.Free delivery is available to most UK postcodes.Operates using a piston and springNo need for electricityAutomatically opens the louvre window at a temperature of 12-15CCloses it as the temperature fallsSimple installationReassuring 1-year warrantyCompatible with any Palram Canopia Rion Greenhouse side louvre windowFree delivery to most UK postcodes