Description
This clever automatic roof vent opener works using a piston of oil that expands or contracts depending on the temperature in the greenhouse. This means that the roof vernts open on their own when the inside temperature gets too hot and will close again when it cools. The vent begins to open at 17˚C and will open progressively wider up to a maximum of 30˚C when the vent is at it's maximum 45cm opening.
The Vitavia automatic roof vent opener does not need a power supply to operate.