The Automatic Vent Opener was made to automatically control the temperature and humidity levels and offer additional ventilation when needed, making gardening easier. As the air inside the greenhouse warms, the vent steadily opens to allow the right amount of air flow 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 home window, as the surroundings gets warmer, then agreements as it cools, closing with the utilization of a spring and resetting the piston. All you need to do is definitely to install it on your roof vent window and it automatically starts functioning. The Automatic Vent Opener operates without the usage of electricity and is compatible with all Palram greenhouse models only. The solar run Vent Opener will start to open as temperature ranges inside your greenhouse reach 68 degrees F with full-open at 80 degrees. It installs efficiently and can provide care-free ventilation.
Ingenious temperature-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and actually skylights. Works during the day and maintain a constant interior climate, something not possible to attain by manual adjustments.

Requires no batteries or electricity.
It can be adjusted to start opening between 60-77°F. Fully open at 86-90°F. Fully closed at 55°F.
Strongly recommended for most our glazed season extenders since it dramatically increases plant growth.
The hydraulic cylinder has a 1 year warranty. The average duration of the cylinder is 5-10 years, even though some can last up to 20 years.

Screw directly into polycarbonate panels, wooden, or metal frames. THE TYPICAL Vent Opener can open up a hinged windowpane or vent weighing as much as 32 lb. For larger panes use the more powerful Gigavent with all metal construction, to lift up to 65 lbs.

Note from the manufacturer: Suggested to lubricate the Automatic Greenhouse Vent piston rod yearly, this will help extend the lifetime of the hydraulic cylinder. Don’t use solid grease, as dirt particles “glues” quickly onto the piston rod and can damage the rubber. Also do not forget to unlock the vent in the wintertime if departing the vent openers installed. Even a weak winter sunlight can heat the hydraulic cylinder sufficiently to make it start pressing 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 may be the only solar-operate control with a quick-release mounting bracket. Simply grasp the “clutch” arm and squeeze for easy detachment. This enables vent to be completely opened for usage of the interior.