Automatic Vent opener Vent-LN03 for window/doors of greenhouse, opening 75-90°F

Description

Automatic Vent opener Vent-L N03 for window/doors of greenhouse load up to 30kg (66lb) opening temperature 24-32°C (75-90°F)
Automatic Vent Opener Vent-L Opening Temperature 75-90°F of Greenhouse for Window/Doors - YouTube
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Universal Automatic Vent-L for vents, doors, greenhouses and
poly tunnels
Vent-L is a unique, versatile, reliable device that does not require electricity, and works only on the raising of temperature in your greenhouse.
Vent-L will protect your plants in the sunny days in the heat and keep a comfortable temperature in greenhouses or
poly tunnels
.
Thanks to Vent-L, there is no need to open and close vents and doors in the greenhouse every day, every morning and evening ,it will do it for you.
There is no need to ask your neighbors to close  window leaves/ doors of your greenhouse. Vent-L will do it for you.
You can go abroad or have a rest, Vent-L» will save the crop from the heat.
Vent-L is a simple but reliable device that does not require special skills to install in a greenhouse.
For installing vent opener it's enough to find support on the profile of greenhouse in distance of 450-500 mm to the line hinges of the door or window, or set on the window or the door itself on mobile and stationary part.
Vent-L can open your windows/doors at a temperature of 24°C
(75°F)
which is the most favorable temperature for the growth of plants.The maximum value of the open window or door is 32°C
(90°F)
, which is critical for some plants, such as tomatoes (tomato pollen is sterilized). Through setting opener, you can customize the time of opening without dismantling it.
HOW DOES IT WORK?
The basis of the device is a cylinder (we use hydraulic cylinders manufacturing in Sweden, according to the results of operation (3 years), there was no failure of the warranty).
The cylinder filled with  a special fluid, which is developed by engineers of"ONIKS". It expands under the heat and pushes on the piston rod, which opens the door or window. When the temperature is low, the fluid compresses,  the return spring returns the plunger and piston to its original position thereby closing the window or door in a greenhouse.
BENEFITS of the VENT-L to other similar devices:
1. «Vent-L» does not require electric power and operates exclusively on the temperature fluctuations of the greenhouse.
2. 4 screws for setting only.
3.  It can be fixed both for the opening doors and vents of greenhouses.
4. Control of  the starting of opening.
5.Stem diameter of 6 mm and a metal piston is able to open the window up to 30 kg (66lb) and can withstand enormous wind loads.
6. It does not require dismantling during winter.
7. "Vent-L"is located on the upper level of the greenhouse, it heats up faster, the plants on the lower levels are in conditions with lower temperature. An open between 24-32°C (75-90°F) is best for most plant species. .
8. More than 10,000 times of opening/closing.
9. Easy disconnect from the vents or doors for opening and closing manually.
10. All the major fasteners are galvanized coating that protects them from corrosion in an environment of high humidity of greenhouse.