Air Dryers | Refrigerated Air Dryers | Compressed Air Dryers compressor, air compressor, polar air, eaton, eaton compressor, compressed air systems, air tools, industrial compressor, consumer compressor Refrigerated air dryers are one of the most common air compressors add-ons, due to their relatively low cost and high efficiency. Our air dryers purify compressed air, by chilling it to condense the moisture, leading to cleaner air and a longer life for your valuable equipment.