ELI5: Explain Like I'm 5

Fan coil unit

A fan coil unit is a machine that helps cool or heat a room. It works by using a fan to move hot or cold air around the room, making the room either warmer or cooler. The fan coil unit has coils inside it that contain either cold or hot liquid. When the fan coil unit is turned on, the fan moves the air around the room and across the coils, which makes the room warmer or cooler depending on which liquid is in the coils.
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