The Automatic Vent Opener was designed to automatically control the temperature and humidity Automatic Greenhouse Vent levels and offer additional ventilation when needed, making gardening easier. As the air inside the greenhouse warms, the vent gradually opens to allow the right amount of air flow into the greenhouse and closes when the temperature cools. The vent arm was designed with a steel cylinder containing wax which expands when heated to push a piston, which raises the home window, as the atmosphere gets warmer, then contracts as it cools, closing with the use of a spring and resetting the piston. All you need to do is usually to install it on your own roof vent window and it automatically starts functioning. The Automatic Vent Opener functions without the utilization of electricity and works with with all Palram greenhouse versions only. The solar run Vent Opener will begin to open as temps 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-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and even skylights. Works throughout the day and maintain a constant interior climate, something difficult to attain by manual adjustments.

Requires simply 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 almost all our glazed season extenders because it dramatically enhances plant growth.
The hydraulic cylinder includes a 1 year warranty. The average lifetime of the cylinder is definitely 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 a hinged home window 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.