The Automatic Vent Opener was designed to automatically control the temperature and humidity levels and offer additional Greenhouse Vent Opener ventilation when needed, making gardening easier. As the air flow in the greenhouse warms, the vent steadily opens to enable the correct amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was made with a metal cylinder containing wax which expands when heated to drive a piston, which raises the screen, as the air flow 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 windows and it immediately starts operating. The Automatic Vent Opener operates without the usage of electricity and works with with all Palram greenhouse models only. The solar run Vent Opener will begin to open as temperatures 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 during the day and maintain a continuous interior climate, something unattainable to accomplish by manual adjustments.
Requires simply no batteries or electricity.
It can be adjusted to begin opening between 60-77°F. Fully open at 86-90°F. Fully closed at 55°F.
Strongly recommended for almost all our glazed season extenders because it dramatically increases plant growth.
The hydraulic cylinder comes with a 1 year warranty. The average duration of the cylinder is 5-10 years, although some can last up to twenty years.
Screw directly into polycarbonate panels, wooden, or metal frames. The Standard Vent Opener can open up a hinged windows or vent weighing as much as 32 lb. For bigger panes use the more powerful Gigavent with all metallic building, to lift up to 65 lbs.