The Helios RVM 710 is a motorised damper built to stop cold air from entering horizontal fan setups. It features a cylindrical housing constructed from sheet steel, with flanges on both sides for direct mounting to the fan base plate. The flange holes follow DIN 24155, page 2 standards, ensuring compatibility. Aluminium flaps provide effective airflow regulation, while polymer buffer connectors allow for quiet and smooth operation. The unit includes a 0.9 m connection cable and should be wired in parallel with the fan for synchronized performance.