Haofy Automatic Greenhouse Window Opener, Greenhouse Automatic Roof Vent Opener Cylinder, Heat Sensitive Window Opener for Sheds and Greenhouse

• 【Working Conditions】Start to open - 15°c - 25°c (60°-77F); Fully open temperature is about 30°; Maximum window opening approximately 45cm/18'', depending on adjustment and load.
• 【Working Conditions】Start to open - 15°c - 25°c (60°-77F); Fully open temperature is about 30°; Maximum window opening approximately 45cm/18'', depending on adjustment and load.
• 【Working Conditions】Start to open - 15°c - 25°c (60°-77F); Fully open temperature is about 30°; Maximum window opening approximately 45cm/18'', depending on adjustment and load.
• 【No Electricity Needed】Uses solar energy, open or close the greenhouse vents as temperature rises or drops and clamps to greenhouse bars. Do not use this opener cylinder anywhere the temperature will exceed 50° (122F).
• 【Easy To Assemble】Window roof vent opener is easy to assemble, Screws into wood and clamps onto aluminium greenhouses without the need for drilling, can be clamped onto or screwed onto your greenhouse frame.
• 【Maximum Opening Weight】Window roof vent opener Suitable for greenhouse window up to 7kg/15lb (if more than 7kg, we recommend you to use two window opener).
• 【Application】It will automatically open and shut your greenhouse window to maintain the best growing temperature and preventing your greenhouse from overheating. Perfect for your greenhouse window.

Specifications: Item Type: Greenhouse Winder Opener Cylinder Temperature range 15°- 25°/60°-77F Weight: Approx. 107g Package: 1 x Greenhouse Winder Opener Cylinder Notes: Do not use this opener cylinder anywhere the temperature will exceed 50° (122F). Do not dismantle the cylinder. This products need to be refrigerated before use it. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.