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 atmosphere inside the greenhouse warms, the vent steadily opens to enable the right amount of ventilation into the greenhouse and closes when the temperature cools. The vent arm was designed with a metallic cylinder containing wax which expands when heated to press a piston, which raises the screen, as the air gets warmer, then contracts since it cools, closing with the usage of a spring and resetting the piston. All you need to do is definitely to install it on your own roof vent windows and it immediately starts working. The Automatic Vent Opener functions without the use of electricity and is compatible with all Palram greenhouse models only. The solar driven Vent Opener will start to open as temps within your greenhouse reach 68 degrees F with full-open at 80 degrees. It installs efficiently and will provide care-free ventilation.
Ingenious temperature-delicate device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works throughout the day and maintain a continuous interior climate, something extremely hard to attain by manual adjustments.

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

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

Note from the manufacturer: Recommended to lubricate the piston rod yearly, this can help extend the duration of the hydraulic cylinder. Don’t use solid grease, as dust particles “glues” quickly onto the piston rod and will damage the rubber. Also do not forget to unlock the vent in the winter if departing the vent openers set up. A good weak winter sunlight can high temperature the hydraulic cylinder sufficiently to create 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 power. The solar vent opener is the only solar-driven 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.