The Automatic Vent Opener was designed to automatically control the Greenhouse Vent Opener temperature and humidity levels and offer additional ventilation when needed, making gardening easier. As the surroundings inside the greenhouse warms, the vent steadily opens to allow the right amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was made with a metallic cylinder containing wax which expands when heated to drive a piston, which raises the window, as the air flow gets warmer, then agreements as it cools, closing with the utilization of a spring and resetting the piston. All you have to to do can be to install it on your roof vent windowpane and it immediately starts functioning. The Automatic Vent Opener functions without the use of electricity and is compatible with all Palram greenhouse versions only. The solar powered Vent Opener will begin to open as temperature ranges inside your greenhouse reach 68 degrees F with full-open at 80 degrees. It installs quickly and easily and can provide care-free ventilation.
Ingenious temperature-delicate device that automatically opens and closes coldframe lids, greenhouse windows and actually skylights. Works during the day and maintain a constant interior climate, something impossible to attain by manual adjustments.

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

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

Note from the maker: Recommended to lubricate the piston rod annual, this can help extend the duration of the hydraulic cylinder. Avoid 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 sunlight can heat 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-operate control with a quick-release mounting bracket. Just grasp the “clutch” arm and squeeze for easy detachment. This allows vent to be fully opened for access to the interior.