Incorporating heat exchangers with outdoor air, the Oasis Indirect Evaporative Coolers (IEC) gives minimal air filtration and enhanced supply temperatures resulting in data center power utilization efficiency (PUE) capabilities of less than 1.1. The indirect evaporative cooling system dissipates heat from recirculated data center air. According to the manufacturer, the supply and outdoor air do not mix, preventing contamination. The compact fully packaged unit offers evaporative cooling SEERs in excess of 45. Direct exchange (DX) and/or direct evaporative cooling options are available. Direct air-side economizing solutions are also available.