Eastbuy-EU Solar Heat Sensitive - Greenhouse Window Opener Vent Autovent Solar Heat Sensitive Automatic Greenhouses Roof

【Features】Automatic window opener prevent greenhouse overheating. 【Automatic Vent Opener】Automatic vent opener ideal for your greenhouse window--opens and closes your greenhouse window. 【Function】Greenhouse window opener as the temperature changes automatically, maintains the best growing temperature and prevents your greenhouse from overheating. 【Solar Energy】Non electric, window opener automatic uses solar energy, open or close the greenhouse vents as temperature rises or drops.