Unit Coolers Blue anti-corrosion-fin increases the life span of the coil. Air-pass guard is located at the bottom of the coil to improve heat exchange rate. Easy to replace defrost heater (LED model). Corrugated fin is used to increase heat exchange rate by expanding the surface area. Even in confined space, all parts can be reached easily by opening the front cover. Location of power connector makes replacement of motor convenient. 1 Year fan motor and parts warranty! Seamless inner groove copper tube increases the heat exchange rate by reducing the space between the fin and the copper tube. Venturi type distributor and precise orifice hole are used to minimize the pressure drop and maximize the freezing capacity respectively. Even in confined space, all parts can be reached easily by opening the front cover. Thermostat is installed to prevent over temperature on heater. Circuit opens automatically over 50ºF. Parts available: Expansion Valve (Sporlan) (Pre-mount option) Solenoid Valve (Sporlan) Thermostat (Johnson control) The spiral fan guard enables cold air to be delivered efficiently and thoroughly. The protruding fan and motor placement substantially reduce vibration and noise. PSC fan motor, which prevents oil evaporation, is used for long life expectancy. EC motor (optional) for high energy efficiency. Unique air flow system (Patent pending) results in improved circulation within crowded walk-in cooler/freezer. Anti-oxidizing stainless steel mounting and bolts.