The Helios MVP 200 is a RADAX MixFlowVent two-stage in-line fan designed for compact duct installation where high pressure is required. It consists of two mixed flow fans mounted in series on a common base with a connecting sleeve, effectively doubling the pressure output while maintaining consistent volume flow. This pre-assembled unit simplifies installation and maintenance. The casing is constructed from impact-resistant, corrosion-resistant light-grey polymer and includes an integrated mounting frame suitable for wall or ceiling installation. Connection spigots fit standard duct sizes for easy integration. The fan unit, complete with terminal box, can be rotated to any desired position by loosening the clips, allowing easy cleaning and servicing. The mixed flow impeller features 8 spatially curved blades crafted from durable polymer materials, dynamically balanced to quality class G 6.3 in accordance with VDI 2060 and DIN ISO 1940 standards to ensure smooth, quiet operation. The unit is driven by a totally enclosed ball bearing motor designed for continuous operation, offering humidity protection and insulation class F. The motor is maintenance-free, radio interference suppressed, and protected by thermal contacts for reliable performance and safety