The BIFA Single Phase 4 Pole 18° 400mm bifurcated case axial fan is designed for efficient commercial ventilation. Offered in sizes ranging from 250mm to 1000mm, it includes an IP55-protected motor with Class ‘F’ insulation, suitable for ambient temperatures up to 200°C. The fan’s speed can be adjusted via transformer or inverter when the air temperature is no higher than 60°C. It features an IP55 terminal box and can operate in environments with up to 95% relative humidity. Manufactured to BS EN ISO 9001:2015 standards and performance tested to BS 848 parts 1,2 and ISO 5801, this fan delivers reliable and long-lasting performance, backed by a 2‑year guarantee.