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 inside the greenhouse warms, the vent gradually opens to enable the right amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was made with a metallic cylinder that contains 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 use of a springtime and resetting the piston. All you have to to do is certainly to install it on your own roof vent window and it automatically starts functioning. The Automatic Vent Opener works without the use of electricity and works with with all Palram greenhouse versions only. The solar driven Vent Opener will start to open as temperature ranges within 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-delicate device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works throughout the day and maintain a continuous interior Greenhouse Vent Opener climate, something difficult to attain by manual adjustments.

Requires 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 most our glazed season extenders because 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, although some can last up to 20 years.

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