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 atmosphere in the greenhouse warms, the vent steadily opens to enable the correct 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 atmosphere gets warmer, then contracts as it cools, closing with the usage of a springtime and resetting the piston. All you have to to do is to install it on your roof vent window and it immediately starts operating. The Automatic Vent Opener functions without the utilization of electricity and works with with all Palram greenhouse models only. The solar run Vent Opener will begin to open as temperatures within 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 also skylights. Works during the day and maintain a constant interior climate, something not possible to achieve 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.
Strongly recommended for every our glazed season extenders since it dramatically enhances plant growth.
The hydraulic cylinder includes a 1 year warranty. The average duration of the cylinder can be 5-10 years, although 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 as much as 32 lb. For bigger panes use the more powerful Gigavent with all metal building, to lift up to 65 lbs.
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