The LB Fans LCA353420 is a long cased axial fan engineered for commercial ventilation applications. It features a three-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 regulation via a transformer or inverter. The fan is equipped with an IP55-rated terminal box and a factory-set adjustable polypropylene impeller. Designed to perform in relative humidity levels up to 95%, it is manufactured in accordance with BS EN ISO 9001:2015 standards. Performance testing has been conducted to BS 848 parts 1 and 2 and ISO 5801. This fan includes a 2‑year guarantee, offering a dependable solution for efficient commercial ventilation.