The LB Fans LCA353434 is a long cased axial fan designed for commercial ventilation applications. It features a three-phase, 4‑pole motor with IP55 protection and Class ‘F’ insulation, capable of operating in ambient temperatures up to 54˚C. Many models in this series allow speed control via a transformer or inverter. The fan comes with an IP55-rated terminal box and a factory-set adjustable polypropylene impeller. It is suitable for environments with relative humidity levels up to 95% and is manufactured in line with BS EN ISO 9001:2015 standards. Performance testing has been conducted according to BS 848 parts 1 and 2 and ISO 5801. With a 2‑year guarantee, this fan provides a reliable and efficient solution for commercial ventilation.