The Automatic Vent Opener was designed to automatically control the temperature and humidity amounts and provide additional ventilation when needed, making gardening easier. As the air flow inside the greenhouse warms, the vent steadily opens to allow the right amount of air flow 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 push a piston, which raises the windowpane, as the atmosphere gets warmer, then agreements since it cools, closing with the use of a spring and resetting the piston. All you have to to do can be to install it on your roof vent windowpane and it immediately starts working. The Automatic Vent Opener functions without the utilization of electricity and is compatible with all Palram greenhouse models only. The solar run Vent Opener will start to open as temperatures inside your greenhouse reach 68 Automatic Greenhouse Vent 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 even skylights. Works during the day and maintain a constant interior climate, something difficult 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 every 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 is certainly 5-10 years, although some can last up to twenty years.

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