The Automatic Vent Opener was designed to automatically control the temperature and humidity amounts and offer additional ventilation when needed, making gardening easier. As the air flow in the greenhouse warms, the vent steadily opens to enable 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 drive a piston, which raises the screen, as the air flow gets warmer, then contracts as it cools, closing with the use of a springtime and resetting the piston. All you have to to do is usually to install it on your roof vent windowpane and it immediately starts functioning. The Automatic Vent Opener operates without the utilization of electricity and works with with all Palram greenhouse models only. The solar run Vent Opener will begin to open as temps within 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-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works during the day and maintain a continuous interior climate, something unattainable to accomplish by manual adjustments.

Requires simply 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 Automatic Greenhouse Vent recommended for all our glazed season extenders since it dramatically improves plant growth.
The hydraulic cylinder includes a 1 year warranty. The average duration of the cylinder is 5-10 years, although some can last up to 20 years.

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

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