Automatic Greenhouse Window Opener Auto Vent Opener Roof Vent Opener Greenhouse Accessories Solar Window Louvre Thread Opener Auto Vent Kit Agriculture Gardening Tools Greenhouses Supplies

About this item ? HIGH QUALITY The window opener is made of premium aluminum alloy materials. The paint spraying aluminum frame looks more lustrous, durable and rust-proof. ? NO ELECTRIC POWER NEEDED Uses solar energy, open or close the greenhouse vents as temperature rises or drops and clamps to greenhouse bars – no drilling needed quality construction. ? APPLICATION Maximum window opening approximately 45cm/18”, depending on adjustment and load. Lifts vent weight up to 15.3 lbs ( 7 kg ),covers most of greenhouse windows.If it is still not enough for your window,you could use two window openers together. ? AUTOMATIC This opener will automatically open and close your greenhouse window as the temperature changes automatically, This automatic window opener will help you maintaining the best growing temperature and prevent your greenhouse from overheating. ? NOTICE Do not apply excessive loads by locking or covering window.The automatic ventilation window opener in the greenhouse cannot be used in an environment with a temperature higher than 50°(122°F)