The present invention relates to a fan coil unit installed close to the wall of the room to discharge cold and hot air to maintain the indoor cooling and heating. In the fan coil unit discharged to the outside according to the drive it is possible to change the position of the discharge grill as needed.;To this end, the lower casing 1b, which is dividedly formed and coupled to the frame 8, is detachably screwed to the lower casing, and is formed to have the same height t and depth p and screwed onto the frame. It consists of an upper casing 1a, an opening 13 formed on the upper casing, and a discharge grill 7 mounted on the opening so that air passing through the heat exchanger 2 is discharged to the outside.
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