Louvre Vent Openers.
€49.99
Out of stock
SKU
R04023-1
Double Oil Heater
Previous
Auto vent openers for both roof and side vents.
Ventomax ventilates the greenhouse by automatically opening and closing vents.
As it is based on solar energy, Ventomax needs no electrical installation. The sun heats up the black cylinder, which contains a vegetable oil. When heated the oil expands, pushing out the piston and thus opening the window.
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