The Automatic Vent Opener was designed to automatically control the temperature and humidity levels and offer additional ventilation when needed, making gardening easier. As the air flow in the Automatic Greenhouse Vent greenhouse warms, the vent gradually opens to enable the right amount of ventilation into the greenhouse and closes when the temperature cools. The vent arm was made with a metallic cylinder containing wax which expands when heated to press a piston, which raises the screen, as the atmosphere gets warmer, then agreements as it cools, closing with the usage of a springtime and resetting the piston. All you have to to do is usually to install it on your roof vent window and it instantly starts working. The Automatic Vent Opener operates without the use of electricity and works with with all Palram greenhouse models only. The solar run Vent Opener will begin to open as temperature ranges inside your greenhouse reach 68 degrees F with full-open at 80 degrees. It installs efficiently and will provide care-free ventilation.
Ingenious temperature-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works throughout the day and maintain a constant interior climate, something extremely hard to achieve by manual adjustments.

Requires simply no batteries or electricity.
It could be adjusted to start opening between 60-77°F. Fully open at 86-90°F. Fully closed at 55°F.
Strongly recommended for almost all our glazed season extenders because it dramatically boosts plant growth.
The hydraulic cylinder includes a 1 year warranty. The common lifetime of the cylinder is 5-10 years, although some can last up to twenty years.

Screw straight into polycarbonate panels, wooden, or metal frames. The Standard Vent Opener can open up a hinged window or vent weighing as much as 32 lb. For larger panes use the stronger Gigavent with all metallic building, to lift up to 65 lbs.

Note from the maker: Recommended to lubricate the piston rod annual, this will help extend the lifetime of the hydraulic cylinder. Don’t use solid grease, as dust particles “glues” quickly onto the piston rod and can harm the rubber. Also don’t forget to unlock the vent in the winter if leaving the vent openers set up. Even a weak winter sun can temperature the hydraulic cylinder sufficiently to create it start pushing the piston rod outwards.
This solar vent control will open and close vents, in your solar gem greenhouse. It features two closing springs for extra strength. The solar vent opener is the only solar-powered control with a quick-release mounting bracket. Just grasp the “clutch” arm and squeeze for easy detachment. This enables vent to be completely opened for access to the interior.