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 atmosphere in the greenhouse warms, the vent gradually opens to allow the right amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was designed with a metal cylinder that contains wax which expands when heated to force a piston, which raises the windows, as the surroundings gets warmer, then agreements as it cools, closing with the use of a spring and resetting the piston. All you have to to do can be to install it on your own roof vent home window and it automatically starts working. The Automatic Vent Opener works without the use of electricity and is compatible with all Palram greenhouse models only. The solar run Vent Opener will begin to open as temps 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 also skylights. Works throughout 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 begin opening between 60-77°F. Fully open up at 86-90°F. Fully closed at 55°F.
Strongly recommended for all our glazed season extenders since it dramatically improves plant growth.
The hydraulic cylinder has a 1 year warranty. The common duration of the cylinder is certainly 5-10 years, although some can last up to twenty years.
Screw straight 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 more powerful Gigavent with all steel construction, to lift up to 65 lbs.
Note from the manufacturer: Suggested to lubricate the Automatic Greenhouse Vent piston rod yearly, this can help extend the lifetime of the hydraulic cylinder. Don’t use solid grease, as dust particles “glues” very easily onto the piston rod and will damage the rubber. Also do not forget to unlock the vent in the winter if leaving the vent openers set up. A good weak winter sun can warmth 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 strength. 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 enables vent to be completely opened for usage of the interior.
