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 air within the greenhouse warms, the vent gradually opens to enable the right amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was made with a steel cylinder containing wax which expands when heated to drive a piston, which raises the home window, as the surroundings gets warmer, then agreements as it cools, closing with the use of a springtime and resetting the piston. All you have to to do is definitely to install it on your own roof vent window and it automatically starts functioning. 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 temperatures 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 actually skylights. Works throughout the day and maintain a continuous interior climate, something difficult to attain 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 most our glazed season extenders because it dramatically increases plant growth.
The hydraulic cylinder includes a 1 year warranty. The average duration of the cylinder is 5-10 years, even though some can last up to twenty years.
Screw directly into polycarbonate panels, wooden, 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 steel 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. Avoid solid grease, as dirt particles “glues” easily onto the piston rod and will 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 high temperature 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-powered control with a quick-release mounting bracket. Just grasp the “clutch” arm and squeeze for easy detachment. This allows vent to be completely Automatic Greenhouse Vent opened for access to the interior.