Abstract: A refrigeration unit for storing items to be refrigerated. The refrigeration unit includes an insulated enclosure defining a compartment, and has a top wall, a rear wall, and opposing side walls. An evaporator is disposed within the compartment and is secured to the rear wall. An evaporator cover has a top portion and a rear portion. The rear portion covers the evaporator and has a sloping rear face that slopes rearwardly and downwardly toward a drain trough. The sloping rear face directs condensate from the evaporator into the drain trough. A drain plate covers the drain trough and the sloping rear face. An angled grate is secured to the drain plate and covers an inlet to an air flow channel formed by the rear wall, and the evaporator cover and the drain plate. A fan is secured over an angled opening formed in the top portion of the evaporator cover and is operable to draw air through the air flow channel.