The Automatic Vent Opener was made to automatically control the temperature and humidity amounts and provide additional ventilation when needed, making gardening easier. As the air flow within the greenhouse warms, the vent steadily opens to enable the correct amount of air flow 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 drive a piston, which raises the screen, as the air 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 certainly to install it on your roof vent home window and it immediately starts working. The Automatic Vent Opener Greenhouse Vent Opener operates without the use of electricity and works with with all Palram greenhouse models only. The solar driven 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 will provide care-free ventilation.
Ingenious temperature-delicate device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works throughout the day and maintain a constant interior climate, something unattainable to achieve 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 almost all our glazed season extenders since it dramatically enhances plant growth.
The hydraulic cylinder has a 1 year warranty. The average duration of the cylinder is definitely 5-10 years, even though 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 stronger Gigavent with all steel structure, to lift up to 65 lbs.