The BIFA Three Phase 4 Pole 24-degree 500mm axial fan is built for commercial ventilation applications. Available in diameters from 250mm to 1000mm, it features IP55-protected motors with Class ‘F’ insulation to ensure dependable and long-lasting performance. The fan can operate in 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 relative humidity levels up to 95%. Manufactured according to BS EN ISO 9001:2015, the fan’s performance has been tested to BS 848 parts 1 and 2 and ISO 5801 standards. The BIFA503424 model comes with a 2‑year guarantee, providing reliable and efficient commercial ventilation.