Automatic Design The automatic window opener opens and closes your greenhouse window as the temperature changes, helping to maintain optimal growing conditions and prevent overheating. Solar Energy Powered by solar energy, this device automatically opens or closes greenhouse vents in response to temperature changes. It saves energy and time, requiring no manual operation. CO2 Friendly This window opener is environmentally friendly and CO2-efficient throughout its lifetime, as it operates without the need for electricity. Easy Installation The window opener can be clamped or screwed onto your greenhouse frame. Ensure your greenhouse window can open freely by at least 45 cm (18 inches). Avoid applying excessive load by locking or covering the window. Hydraulic Cylinder with Wax The core technology is a hydraulic cylinder containing plant-based wax, which acts as a thermostat for the greenhouse window opener, eliminating the need for electrical power.