The BIFA Single Phase 4 Pole 28° 315mm fan is part of the BIFA bifurcated case axial fan series, designed for commercial ventilation applications. It is available in diameters from 250mm to 1000mm and features motors with IP55 protection and Class ‘F’ insulation, allowing operation in ambient temperatures up to 200°C. Fan speed can be adjusted via a transformer or inverter when the ambient air temperature is 60°C or below. The unit includes an IP55-rated terminal box and is suitable for environments with relative humidity levels up to 95%. Manufactured in compliance with BS EN ISO 9001:2015, its performance is tested according to BS 848 parts 1 and 2 and ISO 5801 standards. The fan comes with a 2‑year guarantee.