AUTOMATIC :Automatic Opener Ideal for your greenhouse window,opens and closes your greenhouse window as the temperature changes automatically.It maintains the best growing temperature and prevents your greenhouse from overheating. NON ELECTRIC :Non need Electric, uses solar energy, open or close the greenhouse vents as temperature rises or drops.SAVE your enegy and time,No need for human operation. EASY TO INSTALL :Can be clamped onto or screwed onto your greenhouse frame; Please ensure your greenhouse window can be opened freely by at least 45cm (18').Do not apply excessive loads by locking or covering window ENVIRONMENTAL :You don't need any electricity in your greenhouse; the window opener will be very environmental and CO2-friendly throughout its whole lifetime REPLACE CYLINDER TEMPERATURE SENSOR :Our renowned hydraulic cylinders replace our small range of window openers,The core technology is the hydraulic cylinder that contains a plant-based wax,This special designed cylinder containing this wax, works as the greenhouse window openers thermostat, thus there is no need for electrical power supply.
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