The BIFA Three Phase 4 Pole 26-degree 500mm axial fan is designed for commercial ventilation applications. It is available in diameters ranging from 250mm to 1000mm and features motors protected to IP55 with Class ‘F’ insulation, ensuring dependable and long-lasting operation. The fan can operate in ambient temperatures up to 200°C, with speed controllable 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 in compliance with BS EN ISO 9001:2015, the fan’s performance has been tested to BS 848 parts 1 and 2 and ISO 5801 standards. The BIFA503426 model comes with a 2‑year guarantee, providing reliable and efficient commercial ventilation.