The RIGA Automatic Window Opener is an essential tool for maintaining optimal greenhouse conditions without constant supervision. Constructed from durable anodized aluminum, this opener automatically adjusts to temperature changes, ensuring a safe environment for your plants even when you're away. Its quick-release arm allows for easy disconnection in extreme weather, adding a layer of protection for your greenhouse. Operating without electricity, it uses paraffin oil in the piston that expands around 72°F to activate the opening mechanism, making it ideal for energy-conscious and busy gardeners. Compatible with any Riga greenhouse roof vents, it can lift up to 15 lbs, providing reliable and efficient ventilation control. Automatic Vent Opener Features: Made from Anodized aluminum Opens and closes for safe environment control No electrical power needed Quick-release “arm” which allows the opener to be disconnected in adverse weather conditions Works with any Riga greenhouse roof vents Paraffin oil in piston expands starting around 72°F Can lift up to 15 lbs.