Centrifugal fans feature a galvanized steel casing. They are designed for supply and exhaust ventilation systems. They come with a waterproof connection box. They can operate either in supply or exhaust mode, depending on their installation in the ventilation system. They are suitable for installation in ducts with the appropriate diameter. They can be installed at any point in the ventilation system and at any angle. Equipped with a single-phase motor with external rotor and bearings, as well as a centrifugal wheel with curved blades. They include overheating protection with automatic restart. They are installed on walls and ceilings with special mounting brackets. The MARS GDF 200 / 250 / 315 models feature steel blades. The ingress protection rating for electrical parts is IPX4, while for the motor it is IP44.