A refrigeration dryer is a compressed-air dryer that extracts water vapor by the application of cooling and subsequent condensation. Condensation of water vapor occurs on internal cooling surfaces and is then separated and drained. The exit relative humidity is lower than 100 %. Refrigeration dryers are often designed to deliver pressure dew points above 0 °C to prevent freezing on the internal cooling surfaces. All units are fully packaged ready to be hooked-up and are customizable in terms of heavy duty supplies severe, dangerous or explosive environmental conditions, ATEX, CE, ASME, ISO7183 compliance.