The Automatic Vent Opener was made to automatically control the temperature and humidity levels and provide additional ventilation when needed, making gardening easier. As the surroundings within the greenhouse warms, the vent steadily opens to allow the right amount of ventilation into the greenhouse and closes when the temperature cools. The vent arm was made with a metal cylinder containing wax which expands when heated to push a piston, which raises the windows, as the air flow gets warmer, then agreements as it cools, closing with the usage of a spring and resetting the piston. All you have to to do is definitely to install it on your own roof vent windows and it instantly starts working. The Automatic Vent Opener works without the use of electricity and is compatible with all Palram greenhouse versions only. The solar driven Vent Opener will begin to open as temperature ranges 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 even skylights. Works during the day and maintain a constant interior climate, something extremely hard to attain by manual adjustments.

Requires simply 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 because it dramatically boosts plant growth.
The hydraulic cylinder has a 1 year warranty. The average duration of the cylinder is 5-10 years, although some can last up to twenty years.

Screw straight into polycarbonate panels, wood, or metal frames. THE TYPICAL Vent Opener can open a hinged windows or vent weighing as much as 32 lb. For larger panes use the stronger Gigavent with all steel building, to lift up to 65 lbs.

For those whose enthusiasm is Greenhouse Vent Opener, we have the answers.