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 air in the greenhouse warms, the vent gradually opens to enable the correct amount of ventilation into the greenhouse and closes when the temperature cools. The vent arm was made with a steel cylinder that contains wax which expands when heated to force a piston, which raises the home window, as the air gets warmer, then agreements since it cools, closing with the use of a spring and resetting the piston. All you need to do is definitely to install it on your own roof vent window and it automatically starts working. The Automatic Vent Opener functions without 
the utilization of electricity and is compatible with all Palram greenhouse models only. The solar driven Vent Opener will begin to open as temperatures inside your greenhouse reach 68 degrees F with full-open at 80 degrees. It installs quickly and easily 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 continuous interior climate, something not possible to attain by manual adjustments.
Requires no batteries or electricity.
It can be adjusted to start opening between 60-77°F. Fully open up at 86-90°F. Fully closed at 55°F.
Strongly recommended for almost all our glazed season extenders since it dramatically boosts plant growth.
The hydraulic cylinder has a 1 year warranty. The average duration of the cylinder is definitely 5-10 years, although some can last up to twenty years.
Screw straight into polycarbonate panels, wood, or metal frames. The Standard Vent Opener can open up a hinged windowpane or vent weighing just as much as 32 lb. For bigger panes use the more powerful Gigavent with all metal structure, to lift up to 65 lbs.
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