Temperature-Dependent Ventilation: Our automatic greenhouse vent opener reacts to temperature changes, effectively regulating the indoor climate of your greenhouse. As the temperature rises, the gas-filled cylinder expands, gently pushing the window open. When the temperature cools, the spring mechanism gently closes the window. Wide Temperature Range: The greenhouse window opener functions between 15°C and 25°C (60°F-77°F), adapting to various weather conditions. The automatic window opener allows for full opening at temperatures above 30°C (86°F), offering a maximum ventilation distance of 45 cm (18 inches) for optimal air circulation. No Power Required: Our automatic greenhouse window opener is fully automatic and does not rely on batteries or electricity for operation. No additional power source is needed, saving you money and reducing environmental impact. Premium Quality: This iron and stainless steel window opener ensures long-lasting performance. The automatic vent opener meets the demands of greenhouse environments and ensures it will be your reliable gardening companion for years to come. Easy Installation & Compatibility: Installation of the greenhouse vent opener is quick and easy with the included clamps and screws. It fits most greenhouse windows and can be seamlessly integrated into roof vents, making it a versatile choice for various configurations.