Seen this evaporatorative cooler or also known as a swap cooler the other day. Water drips down the wafer looking fill pack, as air is drawn across, the water absorbs heat from the air. The air is cooler on the leaving side. It also humidifies the air, so it shouldn't be used in humid climates.

Posted by HVAC Know It All at 2022-02-10 00:08:20 UTC