Wiwir Auto Vent Opener Solar Heat Sensitive Automatic Greenhouse Window Opener Auto Vent Kit for Garden Greenhouses Roof Ventilation Lifts 30 Lbs(Double Spring Vent Opener)

Double Spring Garden Greenhouse Window Opener Auto Vent Opener Non-Electric Solar Powered Agricultural Greenhouse Automatic Window Opener Kit for Greenhouse Accessories After installed this temperature controlled automatic vent opener, your window will be a self opening one. It is solar heat sensitive that open the vent when weather warms up and then closing when it cools down. Really works well in maintain the greenhouse within the preferred temperature range. Features:Elongated aluminum cylinder with paint spraying, weather resistant. Solar heat sensitive automatic windower opener, automatic stretch or shrink the vent while the temperature is changing. Stainless steel accessories would last long time use. Aluminum frame looks more lustrous, durable and rust-proof. Easy to install, universal fit for all aluminum frame greenhouse. Auto-opening temperature range is adjustable from 15-25Degree C (60-77Degree F). Maximum opening at about 30Degree C86Degree F(depending on adjustment and load). Suitable for the vents weighting up to 7kg15lb. Specifications:Material:Aluminum+SS Package Weight:Approx. 387g 13.66oz Package Size:Approx. 38 x 9.5 x 4.5cm 14.96 x 3.74 x 1.77in Package List:1 x Auto Vent Opener 1 x Package of Accessory 1 x User Manual (English) Warm tips:Do not heat to more than 50Degree C(122Degree F). Do not dismantle the cylinder. Cooling the cylinder for 24 hours before installation. Do not use this opener anywhere the temperature will exceed 50Degree (122F) Please ensure your greenhouse window can be opened freely by at least 45cm (18 inch) Do not apply excessive loads by locking or covering window Do not dismantle the cylinder The Auto vent opener CANNOT be stoped by manual

✿【Premium Quality】– This double spring Automatic Window Opener is made of quality built anodised aluminium.The paint spraying aluminum frame looks more lustrous, durable and rust-proof.The thicker and stronger material with two springs type, suitable for windy mountain area, resist wind twist.
✿【Greenhouse Automatic Vent Opener】– As the temperature changes,This double spring auto thermo for window will automatically open and close your garden greenhouse vent to maintains the best growing temperature and prevents your greenhouse from overheating.
✿【Environmental friendly】– Non electric, uses solar energy,open or close the greenhouse window as temperature rises or drops. This solar heat sensitive auto vent opener can lift up to 15 lbs. The cylinder closes well before deep freezing and opens again without problem.
✿【Working Conditions】–Start opening at 15°C-25°C (59-77°F);Fully open temperature at 30° (86°F) or above;Full opening distance :45 cm (18 inches).The greenhouse automatic roof vent opener kit will shut down completely when the temperature drops to bellow 59°F (15°C).Up to Load Capacity:7-15kgs(15-33lbs).
✿【Warm Tips】– Do not use this automatic roof vent Opener lifts anywhere the temperature will exceed 45° (122F).