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 surroundings in the greenhouse warms, the vent gradually opens to enable the correct amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was designed with a metallic cylinder that contains wax which expands when heated to push a piston, which raises the screen, as the air 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 certainly to install it on your roof vent windows and it automatically starts operating. The Automatic Vent Opener functions without the use of electricity and works with 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 quickly and easily and will provide care-free ventilation.
Ingenious temperature-delicate device that automatically opens and closes coldframe lids, greenhouse windows and also skylights. Works during the day and maintain a continuous interior climate, something impossible to accomplish 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 most our glazed season extenders since it dramatically enhances plant growth.
The hydraulic cylinder has a 1 year warranty. The common lifetime of the cylinder is definitely 5-10 years, even though some can last up to 20 years.

Screw directly into polycarbonate panels, wood, or metal frames. THE TYPICAL Vent Opener can open up a hinged window or vent weighing as much as 32 lb. For bigger panes use the stronger Gigavent with all metal construction, to lift up to 65 lbs.

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