The Automatic Vent Opener was made to automatically control the temperature and humidity amounts and provide additional ventilation when Greenhouse Vent Opener needed, making gardening easier. As the air flow in the greenhouse warms, the vent gradually opens to allow the right amount of ventilation into the greenhouse and closes when the temperature cools. The vent arm was designed with a steel cylinder that contains wax which expands when heated to press a piston, which raises the home window, as the surroundings gets warmer, then contracts since it cools, closing with the utilization of a springtime and resetting the piston. All you need to do can be to install it on your roof vent windowpane and it instantly starts functioning. The Automatic Vent Opener works without the use of electricity and works with with all Palram greenhouse versions only. The solar driven Vent Opener will begin 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-delicate device that automatically opens and closes coldframe lids, greenhouse windows and also skylights. Works throughout the day and maintain a constant interior climate, something unattainable to attain by manual adjustments.

Requires simply 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 because it dramatically improves plant growth.
The hydraulic cylinder comes with a 1 year warranty. The common lifetime of the cylinder is 5-10 years, although some can last up to 20 years.

Screw directly into polycarbonate panels, wood, or metal frames. The Standard Vent Opener can open up a hinged window or vent weighing 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 will help extend the duration of the hydraulic cylinder. Don’t use solid grease, as dirt particles “glues” quickly onto the piston rod and may harm the rubber. Also don’t forget to unlock the vent in the winter if departing the vent openers set up. Even a weak winter sun can warmth 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 strength. The solar vent opener is the only solar-powered control with a quick-release mounting bracket. Simply grasp the “clutch” arm and squeeze for easy detachment. This enables vent to be fully opened for access to the interior.