The LB Fans LCA353428 is a long cased axial fan engineered for commercial ventilation applications. It incorporates a three-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 offer speed adjustment via transformer or inverter. The fan features an IP55-rated terminal box and a factory-set adjustable polypropylene impeller. It is designed for environments with relative humidity levels up to 95% and is manufactured in line with BS EN ISO 9001:2015 standards. Performance has been tested according to BS 848 parts 1 and 2 as well as ISO 5801. This unit comes with a 2‑year guarantee, providing a dependable solution for efficient commercial ventilation.