The Helios MRV 500 is a rugged mounting ring designed for vertically installing fans, such as on shaft walls, in commercial and industrial ventilation systems. Constructed from galvanized sheet steel, it features four robust brackets that support both direct mounting and installation with vibration dampers. Engineered to meet fire safety standards, the MRV 500 is suitable for smoke extraction applications with temperature classifications F300 and F400. This mounting solution ensures reliable, heat-resistant performance in demanding environments