The BIFA Three Phase 4 Pole 28-degree 710mm bifurcated axial fan delivers high-performance commercial ventilation. Offered in sizes from 250mm to 1000mm diameter, it features an IP55-protected motor with Class ‘F’ insulation suitable for ambient temperatures up to 200°C. Motor speed is adjustable via transformer or inverter when the air temperature remains below 60°C. The IP55 terminal box ensures durability, and the fan is capable of operating in relative humidity up to 95%. Manufactured to BS EN ISO 9001:2015 and performance-tested to BS 848 parts 1,2 and ISO 5801, this model (BIFA713428) comes with a 2‑year guarantee for reliability and peace of mind.