Solar Heat Sensitive: the auto greenhouse vent opener will remain open, when the temperature exceeds 25 degrees Celsius, and the opener will close completely, when temperature drops to 15 to 18 degrees Celsius, using solar energy, no batteries or electrical power needed
Widely Applicable: these greenhouse accessories are practical and useful tools, which can be widely applied for greenhouse windows and greenhouse vents in higher wind situations, maintaining the nice growing temperature and preventing your greenhouse from overheating