CHANGE MOORE Auto Vent Opener Automatic Greenhouse 1Pack Window Opener Roof Vent Opener Auto Vent Kit Sensitive Gardening Tools Automatic Greenhouses Supplies (Single Spring Up to 33lbs)

????????????????????????????????????????????-???????????????????????????????????? ???????????????????????????????????????????? Our greenhouse vent automatic opener responds to temperature changes, efficiently regulating your greenhouse's internal climate. As the temperature rises, the gas-filled cylinder expands, gently pushing the window open. Once the temperature cools down, the spring mechanism closes the window smoothly. ???????????????? ???????????????????????????????????????????? ???????????????????? Operating between 15°C to 25°C (60°F - 77°F), the greenhouse window opener adapts to various weather conditions. Automatic window opener achieves a full opening at temperatures above 30°C (86°F) and offers a maximum vent distance of 18'' (45cm), promoting optimal air circulation. ????????????????????????????-???????????????? ???????????????????????????????? Our automatic greenhouse window opener is completely self-sufficient and doesn't rely on batteries or electricity for operation. No additional power source is needed, saving you money and reducing environmental impact. ???????????????????????????? ???????????? ???????????????????????????????? Crafted from iron and stainless steel, this window opener guarantees long-lasting performance. Auto vent opener can withstand the demands of greenhouse environments, ensuring it remains your trusted gardening companion for years. ???????????????? ???????????????????????????????????????????????? ???????????? ???????????????????????????????????????????????????? Installing the greenhouse vent opener is quick and straightforward with the provided clamps and screws. It fits most greenhouse windows and seamlessly integrates with roof vents for houses, making it a versatile choice for different setups.