Automatische Raamopener Thermovent | Vitavia Colour:Aluminium One 70 L bag is

One 70 L bag is sufficient for approximately 1

making them ideal for use in vegetable gardens

Contents: 1L

‼️The base is open on the underside so that water can drain away properly

The system can also be fully automated by combining it with an optional water timer

Automatische Raamopener Thermovent | Vitavia Colour:Aluminium One 70 L bag isAn automatic window opener for a roof vent. The opener works using an expansion fluid in a pressure cylinder and automatically opens the window at a certain temperature. The window opening can be adjusted by turning the opener tighter or looser. Only suitable for the roof vents of Vitavtia greenhouses. The window opener is easy to fit yourself. Not suitable for the Ida 900 1300 Maximum opening height: 45cm Minimum temperature for opening: 16C to 25C