The BIFA Single Phase 4 Pole 40° 400mm bifurcated case axial fan is designed for demanding commercial ventilation applications. Available in sizes from 250mm to 1000mm diameter, this fan features an IP55-protected motor with Class ‘F’ insulation, ensuring durability in environments with ambient temperatures up to 200°C. Speed control can be achieved via transformer or inverter when operating in conditions below 60°C. The unit includes an IP55 terminal box and is suitable for use in areas with relative humidity up to 95%. Manufactured to BS EN ISO 9001:2015 standards and tested to BS 848 parts 1,2 and ISO 5801, it delivers reliable, high-quality performance. Backed by a 2‑year guarantee, this fan is a dependable choice for commercial ventilation needs.