The Thermo Scientific Revco Enzyme Freezer UEN3020D operates on 208 / 230 V of power and features a spacious 29.2 cu ft capacity meeting the demands for industrial, clinical and scientific uses. Designed for storage applications in which even slight intermittent coil warming cannot be tolerated, this unit includes a state of the art microprocessor control system, gravity air circulation, industrial quality cabinet construction and extra strength, hermetically sealed industrial grade refrigeration compressors. Cold wall convection cooling ensures temperature uniformity and maximizes temperature stability without the use of blowers or fans while the manual defrost provides optimum control. The scratch resistant, painted cold-rolled steel exterior provides extra durability while high density, CFC-Free urethane foam insulation ensures the cabinet is protected from ambient temperature fluctuations while minimizing operating costs. For added security, this freezer includes a TempTest electronic probe / alarm test, keyed on / off switch with setpoint security, built-in alarm contacts, audio / visual alarms and lockable, solid doors protect the interior providing sample security. The UEN3020A is backed by a 2 Year Manufacturer's Parts and Labor Warranty within the US and Canada. This refrigerator is UL / CUL Listed and CE Marked for Safety and Performance.