The LB Fans LCA401424 is a long cased axial fan designed for commercial ventilation applications. It features a single-phase, 4‑pole motor with IP55 protection and Class ‘F’ insulation, suitable for operation in ambient temperatures up to 54˚C. Many models in this series allow speed adjustment via transformer or inverter. The fan includes 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 according to BS EN ISO 9001:2015 standards. Performance testing has been carried out in line with BS 848 parts 1 and 2 and ISO 5801. Supplied with a 2‑year guarantee, this fan provides a reliable and efficient solution for commercial ventilation.