Galvanised round VAV unit with low resistance damper blade, supplied with an electronic actuator and aluminium differential pressure sensor. This VAV unit can be applied for regulating constant or variable air volumes based on air quality and/or temperature. The damper blade is equipped with an air tight seal and maintenance free bearings. The laser welded housing meets Class C following EN 12237, damper blade meets Class 2 following EN 1751. Available with external sound attenuators.