Condenser
Short definitionThe coil and fans that reject the heat removed from the room to the outside air.
It is the part of the refrigeration system that rejects heat. The warmer the outside air, the harder it is to reject heat. So the condenser is selected for the hottest days in the region.
In small systems it is in the same body as the compressor. In large systems it goes on the roof or in an open area as a separate unit. Its front and top must be clear and it must not draw back in the hot air it discharges.