Solar Auto Greenhouse Window Opener - Heat Sensitive Vent Tool for Hothouse & Cold Frame Gardening

Description:Perfect for your greenhouse window opens and closes your greenhouse window as the temperature changes automatically, maintains the best growing temperatureand prevents your greenhouse from overheatingNon Electric, uses solar energy, open or close the greenhouse vents as temperature rises or dropsIncluding fittings & installation manualCan be clamped onto or screwed onto your greenhouse frameImportant 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 windowDo not dismantle the cylinderThe opener CANNOT stop by manual Package:1 x Automatic window openerItem Specifications:Maximum window opening 45cmMaximum opening about 30°, depending on adjustment and loadMaximum opening weight 7kg/15lbAdjustable open temperature range 15°- 25°/60°-77FNote: Due to the upgrade of this item, the 11th part showed in manual is not included. Please take the real one as standard.