Yziixi Solar Heat Sensitive Automatic Greenhouse Vent Opener Auto Vent Kit Gardening Tools for Greenhouses Roof Ventilation (Single Spring Vent Opener)

• 【HIGH QUALITY】All parts corrosion resistant. Spring controlled - Resists wind damage when opening and closing. When temperature above 25°/77°F, the window opener will keep opening.Fully open temperature at 30° (86°F) or above; once temperature drop to about 15°/59°F, the window opener will totaly close.
• 【NON ELECTRIC】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. Window roof vent opener Suitable for greenhouse window up to 7kg (if more than 7kg, we recommend you to use two window opener).
• 【AUTOMATIC】This opener will automatically open and close your greenhouse window, as the temperature changes automatically, maintains the best growing temperature and prevents 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°

Product description Automatic Window Opener Greenhouse Solar Heat Sensitive Greenhouse Window Roof Vent Single Spring Window Opener Garden Tools Features: --With the automatic window openers, you can be sure of an even temperature in your greenhouse day and night.they allow thermostatic ventilation control through the roof windows of your greenhouse. --It needs to put the cylinder in the refrigerator for a period of time (half an hour is enough) before the cylinder screw into cylinder housing. Specifications: Material: Stainless Steel Fully adjustable between 20 - 25 ° C (68 - 77 ° F) Maximum window opening: 45cm / 18 inch Maximum opening weight: 7kg/15lb Size: 38 x 9.5 x 5 cm Package: 1 x Automatic Window Opener Kit Notes: Do not use this opener anywhere the temperature will exceed 50° (122F) Please your greenhouse window can be opened freely by at least 45cm (18") Do not apply excessive loads by locking or covering window Do not dismantle the cylinder The opener CANNOT stop by manual Safety Warning CAUTION: Do not use this opener where temperatures exceed 50°C (122°F). Ensure your greenhouse window can open freely at least 45cm (18"). Avoid applying excessive loads by locking or covering the window. Handle with care as the opener is made of sharp aluminum alloy.