He had a spare Peltier cooler sitting around, so he put it to good use as the basis for his air conditioning unit. He sandwiched it between a pair of CPU heatsinks before cramming his makeshift ...

The running gear for this build is nothing fancy; it’s just a standard thermoelectric cooling module ... two air inlets on his printed enclosure to pull air from the cold side of the Peltier ...

Peltier cooling modules ... the refrigerator detects a sudden influx of warm air after restocking from a big grocery trip, the thermoelectric module kicks in to quickly stabilize temperatures.