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 atmosphere inside the greenhouse warms, the vent gradually 
opens to enable the right amount of air flow in to the greenhouse and closes when the temperature cools. The vent arm was made with a metal cylinder that contains wax which expands when heated to push a piston, which raises the screen, as the surroundings gets warmer, then contracts as it cools, closing with the usage of a spring and resetting the piston. All you need to do is usually to install it on your own roof vent windows and it immediately starts functioning. The Automatic Vent Opener functions without the use of electricity and is compatible with all Palram greenhouse models 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 even skylights. Works during the day and maintain a continuous interior climate, something unattainable to attain by manual adjustments.
Requires simply no batteries or electricity.
It could 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 since it dramatically increases plant growth.
The hydraulic cylinder comes with a 1 year warranty. The average duration of the cylinder is usually 5-10 years, even though some can last up to twenty years.
Screw straight into polycarbonate panels, wooden, or metal frames. The Standard Vent Opener can open up a hinged home 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.
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