The BIFA Single Phase 4 Pole 38° 400mm bifurcated case axial fan is a robust solution for demanding commercial ventilation systems. Manufactured in diameters ranging from 250mm to 1000mm, this fan is equipped with an IP55-rated motor featuring Class ‘F’ insulation, ensuring reliable operation in environments with maximum ambient temperatures of 200°C. Speed control can be achieved using a transformer or inverter, provided ambient temperatures remain below 60°C. The unit includes an IP55 terminal box and is capable of operating efficiently in conditions with relative humidity up to 95%. Built under BS EN ISO 9001:2015 standards and performance-tested to BS 848 parts 1,2 and ISO 5801, this fan offers a dependable 2‑year guarantee, delivering both quality and durability for commercial use.