Greenhouse window opener. Automatic window opener with double spring, temperature controlled, 15 kg lifting force.

Double Spring Construction: The double spring mechanism provides stability and flexibility to withstand strong winds. Suitable for most greenhouse windows; the maximum weight of the ventilation windows is less than 15 kg. Safe to use. Automatic Window Opener: The greenhouse window opener can automatically open and close greenhouse windows to control the greenhouse temperature as it changes. The maximum opening distance is 45 cm. Strong Weather Resistance: The aluminum window opener is brighter, more durable, and rust-resistant. The elongated aluminum cylinder is powder-coated for increased durability. Fits most greenhouse windows. Automatic Temperature Control: The automatic opening temperature range is adjustable. When the temperature is below 15°C, the window closes automatically. When the temperature reaches 25°C, the window opens automatically. Easy to Install: The window opener comes with screws for easy installation. You can use a screwdriver to screw directly into panels, wooden or metal frames. The automatic window opener is suitable for modern garden greenhouses.