The BIFA Three Phase 4 Pole 38-degree 500mm axial fan is built for commercial ventilation applications. Available in sizes from 250mm to 1000mm, it features IP55-protected motors with Class ‘F’ insulation to ensure reliable and long-term operation. The fan can handle ambient temperatures up to 200°C, with speed adjustable via transformer or inverter when the surrounding air temperature does not exceed 60°C. Fitted with an IP55-rated terminal box, it is suitable for environments with relative humidity levels up to 95%. Manufactured in compliance with BS EN ISO 9001:2015, its performance has been tested to BS 848 parts 1 and 2 and ISO 5801 standards. The BIFA503438 model comes with a 2‑year guarantee, providing efficient and dependable commercial ventilation.