The LB Fans LCA401426 is a long cased axial fan engineered for commercial ventilation applications. It features a single-phase, 4‑pole motor with IP55 protection and Class ‘F’ insulation, suitable for ambient temperatures up to 54˚C. Many models in this series allow speed control via transformer or inverter. The fan includes an IP55-rated terminal box and a factory-set adjustable polypropylene impeller. Designed for environments with relative humidity levels up to 95%, it is manufactured in compliance with BS EN ISO 9001:2015 standards. Performance testing has been conducted according to 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.