Automatic Window Opener, Automatic Window Opener for Solar Heat Sensitive Greenhouses, Roof Greenhouse Accessories for Greenhouses and Garden Sheds (1X double spring)

【Automatic Window Opener】 The greenhouse window opener can automatically open and close your greenhouse window according to temperature changes to maintain the best growing temperature and prevent your greenhouse from overheating. 【Premium and Durable Material】 The window opener is made of high-quality aluminum alloy, durable and rust-resistant. The thicker, stronger material and dual-spring design ensure a longer service life. 【Adjustable Temperature Range】 The temperature range is adjustable from 15 to 25℃ (60 to 77℉), fully opening at temperatures above 30℃/86℉ and providing a maximum ventilation distance of 45 cm (18") (depending on the setting and load). 【Easy and Wide Installation】 【Applicability】Thanks to its lightweight and practical design, the automatic greenhouse window opener can be easily assembled and disassembled. Quick and easy installation on common garden and conservatory windows with the included clamps and screws; suitable for most polycarbonate panels, timber-framed, wood, or metal greenhouses; for use in gardens, greenhouses, roofs, etc. 【Solar Powered】A heat-activated mechanical system that requires no batteries or electricity and uses solar energy to open or close the greenhouse vents as the temperature rises or falls to ensure adequate air circulation and internal ventilation.