vitavia_sesam_spiro_auto _raamopener paars Thanks to the slightly curved

Thanks to the slightly curved blades

and is non-toxic

giving it a classic and elegant look

which opens smoothly and space-efficiently and can be closed without blocking the passageway

vitavia_sesam_spiro_auto _raamopener paars Thanks to the slightly curvedAn automatic window opener for a roof vent. The opener works via an expansion fluid in a pressure cylinder and automatically opens the window at a set temperature. The opening can be adjusted by turning the opener tighter or looser. Only suitable for the roof vents of Vitavtia greenhouses (excluding the Ida 900 and 1300). The window opener is easy to install yourself. With thermometer Maximum opening height: 45cm Minimum temperature for opening: 16C