Evaporator
Short definitionThe fan unit inside the room that cools the air. How many there are and where they go depends on getting air to the whole room.
The evaporator picks up the heat in the room. It hangs from the ceiling and its fans blow cold air down the length of the room. Its capacity must cover the room’s heat load and the air must reach every corner.
Three things are checked when placing it: air should blow away from the door, not towards it. There should be no racking or product in front of it blocking the air. And a gap should be left between its back and the wall for service and air intake.