The LB Fans LCA351428 is a long cased axial fan designed for commercial ventilation systems. It features a 350mm adjustable polypropylene impeller set at 28° and operates on a single-phase, 4‑pole motor. The motor is IP55 protected and has Class F insulation, allowing operation in ambient temperatures up to 54˚C. Most models in this series support speed control via a transformer or inverter. The fan comes 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 standards. This model is covered by a 2‑year guarantee.