Auto Vent Opener Automatic Greenhouse Window Opener Cylinder Roof Vent Opener Autovent Kit Solar Heat Sensitive Agriculture Gardening Tools Automatic Greenhouses Supplies (Single Spring Lifts 15 Lbs)

Suitable for Most Greenhouses -- This opener will automatically open and shut your greenhouse window to maintain the best growing temperature and preventing your greenhouse from overheating.Quality Construction -- Reliable, quality built anodised aluminium automatic window opener for greenhouses. Working Conditions -- Start to open - 15°c - 25°c (60°-77F); Fully open temperature 35° (19f) or above; Fully open distance 45cm (18"). Environmental friendly -- Non Electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops. Important notice -- Do not use this opener anywhere the temperature will exceed 45° (122F). if you want to use replacement for palram greenhouse, you need to use the drilling tools to screw into the channel and fix it. product information:. Material: Zinc-coated Steel. Weight: 0.97lb/440g. Maximum Load: 15lb (7kg). Product Dimensions: 1.81 x 1.97 x 1.18 inches. Item Weight: 13.1 ounces. package includes: . 1x Auto vent opener. 1 x Manual.