Apptec's Refrigerated Air Dryers are energy efficient and superior performers. You can be guaranteed of reliability, efficiency and convenience when you choose an Apptec's Refrigerated Air Dryer. In refrigerated air dryer, the warm and moist incoming air is first cooled in air-to-air exchange. Some of the moisture is removed by condensation and the cooled air is then cooled further through air-to-refrigerant exchange. The remaining moisture is removed by condensation and drained away. The outgoing cold air is then warmed again through air-to-air exchange to ensure safety of equipment and/or products.