Tyenaza Auto Greenhouse Vent Opener Sensitive Solar Heat Sensitive Auto Vent Openers Roof Window Opener for Greenhouse&Hothouse

• 【NON ELECTRIC】Use solar energy only,no batteries or electricity required.Economic and Eco-friendly.
• 【COMPLETE AUTOMATIC】This vent opener will automatically open and close your greenhouse window while the environment temperature changes , which will help you maintain the best growing temperature and prevents your greenhouse from overheating.
• 【PERFECT FOR GREENHOUSE WINDOW】This vent opener will automatically open and close your greenhouse window while the environment temperature changes , which will help you maintain the best growing temperature and prevents your greenhouse from overheating.
• 【EASY INSTALLATION】Fit for most of aluminum&wooden frame greenhouse. Comes with a fitting accessory pack and a detailed manual for easy installation.
• 【HIGH QUALITY&DURABLE】Made of high quality of galvanized steel.Durable and strong for long time use.

Important notice: Do not use this opener anywhere the temperature will exceed 50° (122F) Please ensure 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 Specifications: Maximum window opening: 45cm Maximum opening about: 30° depending on adjustment and load Maximum opening weight: 7kg/15lb Adjustable open temperature range: 15°- 25°/60°-77F Size: 38 x 9.5 x 9.5 cm / 14.96 x 3.74 x 3.74 inch (appr.) Package included: 1 x Automatic window opener Note: Due to the upgrade of this item, the 11th part showed in manual is not included. Please take the real one as standard.