The LB Fans LCA353424 is a long cased axial fan built for commercial ventilation purposes. It features a three-phase, 4‑pole motor with IP55 protection and Class ‘F’ insulation, capable of functioning in ambient temperatures up to 54˚C. Most models in this series allow speed control via a transformer or inverter. The fan is equipped with an IP55-rated terminal box and a factory-set adjustable polypropylene impeller. It is suitable for relative humidity levels up to 95% and is manufactured in compliance with BS EN ISO 9001:2015. Performance testing has been carried out according to BS 848 parts 1 and 2 and ISO 5801 standards. Supplied with a 2‑year guarantee, this fan provides a reliable and efficient solution for commercial ventilation needs.