Commercial plate axial extractor fans. One of the most common and economic varieties of fans, plate axial fans are normally mounted on a wall and vent straight outside. Here we offer several manufacturers options for comparison. The size offered is the diameter across the blades, the overall size (including the plate) is slightly larger. (See data-sheets.) A WSK gravity shutter is normally mounted externally. Available in single and three phase versions and most are speed controllable. Not normally used with ducting, for this use a cased axial fan type. All fixings available. Any questions or advice please contact us.