A fan 100 has a plurality of preset speed settings, and a means to select one of the preset speed settings. Each of the preset speed settings is pre-calibrated for a particular installation scenario. A method of installing the fan comprises the steps of: installing the fan in a selected installation location; performing a selected installation type; and selecting one of a number of preset speeds on the fan which matches said installation location and said installation type. The installation location may be one of a kitchen, bathroom, W.C. or utility room. The installation type may be one of through a wall, through a window, using a duct shorter than 1.5m or using a duct shorter than 3m. The preset speed setting means may comprise up and down buttons 160, 170 which progressively increase or decrease the fan speed.
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