The Automatic Vent Opener was made to automatically control the temperature and humidity levels and offer additional ventilation when needed, making gardening easier. As the surroundings within the greenhouse warms, the vent steadily opens to allow the correct amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was designed with a steel cylinder containing wax which expands when heated to press a piston, which raises the window, as the atmosphere gets warmer, then agreements since it cools, closing with the utilization of a spring and resetting the piston. All you have to to do can be to install it on your roof vent home window and it immediately starts working. The Automatic Vent Opener operates without the use of electricity and works with with all Palram greenhouse versions only. The solar powered Vent Opener will start to open as temperatures within 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-sensitive 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 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 improves plant growth.
The hydraulic cylinder comes with a 1 year warranty. The average lifetime of the cylinder can be 5-10 years, even though some can last up to twenty years.

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

To view similar Greenhouse Vent Opener products we supply go here.