The Automatic Vent Opener was designed to automatically control the temperature and humidity amounts and provide additional ventilation when needed, making gardening easier. As the surroundings inside the greenhouse warms, the vent steadily opens to allow the correct amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was made with a metal cylinder containing wax which expands when heated to push a piston, which raises the window, as the air flow gets warmer, then contracts since it cools, closing with the use of a springtime and resetting the piston. All you need to do is certainly to install it on your roof vent windows and it automatically starts working. The Automatic Vent Opener works without the use of electricity and works with with all Palram greenhouse models only. The solar run Vent Opener will start to open as temps inside your greenhouse reach 68 degrees F with full-open at 80 degrees. It installs quickly and easily 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 Greenhouse Vent Opener maintain a constant interior climate, something extremely hard to achieve by manual adjustments.

Requires 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 almost 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 is certainly 5-10 years, even though 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 bigger panes use the stronger Gigavent with all metal structure, to lift up to 65 lbs.

Note from the manufacturer: Recommended to lubricate the piston rod yearly, this can help extend the lifetime of the hydraulic cylinder. Don’t use solid grease, as dust particles “glues” very easily onto the piston rod and may damage the rubber. Also don’t forget to unlock the vent in the winter if leaving the vent openers set up. A good weak winter sun can high 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 power. The solar vent opener may be the only solar-driven control with a quick-release mounting bracket. Simply grasp the “clutch” arm and squeeze for easy detachment. This allows vent to be fully opened for usage of the interior.