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 air within the greenhouse warms, the vent gradually opens to allow the correct amount of air flow into 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 force a piston, which raises the home window, as the surroundings gets warmer, then contracts as it cools, closing with the use of a springtime and resetting the piston. All you have to to do is usually to install it on your roof vent windowpane and it immediately starts operating. The Automatic Vent Opener works without the use of electricity and is compatible with all Palram greenhouse versions only. The solar run Vent Opener will start to open as temps inside your greenhouse reach 68 degrees F with full-open at 80 degrees. It installs efficiently and will 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 impossible to accomplish by manual adjustments.

Requires simply no batteries or electricity.
It can be adjusted to begin 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 since it dramatically increases plant growth.
The hydraulic cylinder comes with a 1 year warranty. The average duration of the cylinder is 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 screen or vent weighing as much as 32 lb. For bigger panes use the stronger Gigavent with all steel building, to lift up to 65 lbs.

Have you considered Greenhouse Vent Opener as a routine part of your life?