The BIFA Three Phase 4 Pole 20-degree 630mm bifurcated axial fan is a high-performance solution engineered for commercial ventilation applications. With a size range from 250mm to 1000mm in diameter, this fan is built with a durable IP55-protected motor and Class ‘F’ insulation, ensuring dependable performance and long service life. It operates in ambient temperatures up to 200°C and supports speed control via transformer or inverter when the air temperature remains below 60°C. The fan’s IP55-rated terminal box provides enhanced reliability, while its suitability for relative humidity levels up to 95% RH makes it ideal for challenging environments. Manufactured in compliance with BS EN ISO 9001:2015 and performance tested to BS 848 parts 1 and 2 as well as ISO 5801, the BIFA633420 guarantees efficiency and durability. Supported by a 2‑year guarantee, it is a trusted choice for demanding commercial ventilation systems.