Automatic Vent Opener Vent-L Opening Temperature 75-90°F of Greenhouse for Window/Doors

The automatic vent opener is located in the upper level of the greenhouse, it heats up faster, the plants at the lower levels are in conditions with lower temperatures. An opening temperature between 24-32 ° C (75-90 ° F) is better suited for most plant species. This is its uniqueness compared to other similar devices.
It does not require dismantling during winter.All the major fasteners are galvanized coating that protects them from corrosion in an environment of high humidity of greenhouse.
It can be fixed both for the opening doors and vents of greenhouses.Control of the starting of opening.
More than 10,000 times of opening/closing.
«Vent-L» does not require electric power and operates exclusively on the temperature fluctuations of the greenhouse. Stem diameter of 6-10 mm and a metal piston is able to open the window up to 30-100 kg (66-220lb) and can withstand enormous wind loads.Easy disconnect from the vents or doors for opening and closing manually.
Click on the buy link:
www.amazon.com/dp/B01N5F12BH
www.amazon.com/dp/B06WRWZ514
www.amazon.com/dp/B01N9H85EW
www.amazon.ca/dp/B01N9H85EW
www.amazon.ca/dp/B01N5F12BH
www.ebay.com/itm/331702277203
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vent-l.com

[@vadimnagano]

Собираюсь купить. Но русский акцент у озвучки ужасный.