The Helios MV 125 is a RADAX MixFlowVent in-line fan designed for space-saving duct installations. Its rotatable mixed flow impeller is optimized for delivering high volume airflow and pressure. The casing is made from impact-resistant, corrosion-proof polymer in light grey and includes an integrated mounting frame for easy installation on walls or ceilings. Connection spigots are compatible with all standard duct sizes. The fan unit and terminal box can be rotated to any desired position or removed entirely for cleaning and maintenance by loosening the clips.