The Automatic Vent Opener was designed to automatically control the temperature and humidity levels and offer additional ventilation when needed, making gardening easier. As the atmosphere in the greenhouse warms, the vent steadily opens to enable the right amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was designed with a metallic cylinder that contains wax which expands when heated to force a piston, which raises the home window, as the surroundings gets Greenhouse Vent Opener warmer, then agreements as it cools, closing with the use of a spring and resetting the piston. All you need to do is certainly to install it on your own roof vent window and it immediately starts functioning. The Automatic Vent Opener functions without the use of electricity and works with with all Palram greenhouse versions only. The solar run 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 will provide care-free ventilation.
Ingenious temperature-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works throughout the day and maintain a continuous interior climate, something impossible to attain by manual adjustments.

Requires simply no batteries or electricity.
It can be adjusted to start 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 can be 5-10 years, even though some can last up to 20 years.

Screw directly into polycarbonate panels, wooden, or metal frames. The Standard Vent Opener can open a hinged window or vent weighing as much as 32 lb. For bigger panes use the more powerful Gigavent with all steel building, to lift up to 65 lbs.