The Automatic Vent Opener was designed to automatically control the temperature and humidity levels and provide additional ventilation when needed, making gardening easier. As the surroundings 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 steel cylinder that contains wax which expands when heated to force a piston, which raises the window, as the air gets warmer, then agreements since it cools, closing with the usage of a springtime and resetting the piston. All you need to do is certainly to install it on your own roof vent windows and it instantly starts operating. The Automatic Vent Opener works without the use of electricity and is compatible with all Palram greenhouse models only. The solar powered Vent Opener will begin to open as temperatures 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 actually skylights. Works during the day and maintain a constant interior climate, something unattainable to attain by manual adjustments.
Requires simply no batteries or electricity.
It could be adjusted to start opening between 60-77°F. Fully open up at 86-90°F. Fully closed at 55°F.
Greenhouse Vent Opener Strongly recommended for all our glazed season extenders because it dramatically boosts plant growth.
The hydraulic cylinder includes a 1 year warranty. The average duration of the cylinder is certainly 5-10 years, even though some can last up to 20 years.
Screw directly into polycarbonate panels, wood, or metal frames. THE TYPICAL Vent Opener can open a hinged windowpane or vent weighing just as much as 32 lb. For bigger panes use the more powerful Gigavent with all metal construction, to lift up to 65 lbs.
Note from the maker: Suggested to lubricate the piston rod yearly, this can help extend the lifetime of the hydraulic cylinder. Avoid solid grease, as dirt particles “glues” very easily onto the piston rod and may harm the rubber. Also don’t forget to unlock the vent in the wintertime if leaving the vent openers installed. Even a weak winter sunlight can heat the hydraulic cylinder sufficiently to make 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.