The LB Fans LCA351420 is a long cased axial fan designed for commercial ventilation applications. It includes a 350mm adjustable polypropylene impeller set at 20° and operates with a single-phase, 4‑pole motor. The motor is protected to IP55 standards and uses Class F insulation, allowing operation in ambient temperatures up to 54˚C. Many models in this series support speed control via a transformer or inverter. The fan is equipped with an IP55-rated terminal box and is suitable for relative humidity levels up to 95%. Manufactured according to BS EN ISO 9001:2015, its performance is tested to BS 848 parts 1, 2 and ISO 5801. This model comes with a 2‑year guarantee.