The Automatic Vent Opener was made 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 gradually opens to allow the right amount of ventilation into the greenhouse and closes when the temperature cools. The vent arm was made with a metallic cylinder containing wax which expands when heated to press a piston, which raises the screen, as the atmosphere gets warmer, then agreements as it cools, closing with the utilization of a springtime and resetting the piston. All you need to do is usually to install it on your own roof vent window and it immediately starts working. The Automatic Vent Opener works without the use of electricity and works with with all Palram greenhouse versions only. The solar run 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 will provide care-free ventilation.
Ingenious temperature-sensitive 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 achieve by manual adjustments.
Requires no batteries or electricity.
It can be adjusted to begin opening between 60-77°F. Fully open up at 86-90°F. Fully closed at 55°F.
Strongly recommended for every our glazed season extenders since it dramatically improves plant growth.
The hydraulic cylinder has a 1 year warranty. The average duration of the cylinder is Automatic Greenhouse Vent definitely 5-10 years, even though some can last up to 20 years.
Screw directly into polycarbonate panels, wooden, 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 stronger Gigavent with all steel structure, to lift up to 65 lbs.
Note from the manufacturer: Suggested to lubricate the piston rod annual, this can help extend the duration of the hydraulic cylinder. Avoid solid grease, as dirt particles “glues” easily 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 installed. Even a weak winter sunlight can heat the hydraulic cylinder sufficiently to make 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. Simply grasp the “clutch” arm and squeeze for easy detachment. This allows vent to be completely opened for usage of the interior.