greenhouse vent opener

The Automatic Vent Opener was designed to automatically control the temperature and humidity amounts and offer additional ventilation when needed, making gardening easier. As the atmosphere in the greenhouse warms, the vent gradually opens to allow the right amount of ventilation in to the greenhouse and closes when the temperature cools. The vent arm was designed with a steel cylinder containing wax which expands when heated to force a piston, which raises the windows, as the atmosphere gets warmer, then agreements 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 roof vent windowpane and it automatically starts working. The Automatic Vent Opener operates without the use of electricity and is compatible with all Palram greenhouse versions only. The solar powered 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-delicate device that automatically opens and closes coldframe lids, greenhouse windows and actually skylights. Works throughout the day and maintain a constant interior climate, something extremely hard to accomplish by manual adjustments.

Requires 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 all our glazed season extenders since it dramatically enhances plant growth.
The hydraulic cylinder has a 1 year warranty. The average lifetime of the cylinder is certainly 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 window or vent weighing as much as 32 lb. For larger panes use the more powerful Gigavent with all steel construction, to lift up to 65 lbs.

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