The BIFA Three Phase 4 Pole 20-degree 500mm axial fan is engineered for commercial ventilation applications. Available in sizes from 250mm to 1000mm in diameter, it features IP55-protected motors with Class ‘F’ insulation for dependable and long-lasting 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. It includes an IP55-rated terminal box and is suitable for relative humidity levels up to 95%. Manufactured according to BS EN ISO 9001:2015, its performance has been tested to BS 848 parts 1 and 2 and ISO 5801 standards. The BIFA503420 model comes with a 2‑year guarantee, ensuring reliable and efficient commercial ventilation.