The Helios F 630 HW adapter is designed to facilitate the attachment of square shutters from the VK, RVK, EVK, and RAG series directly to round ducts or fan connectors in the HQ/HW series. It features four corner holes that correspond to the shutter mounting points, ensuring a secure fit. The round connector is mounted onto the fan casing and fixed in place using self-tapping screws, offering a practical solution for transitioning between square and round ventilation components.