The Optimum Series systems incorporate the latest and greatest features in wine cooling into their design, at an affordable price. Advanced blower fans replace axial fans, which accelerates the ow of cold air in your cellar at an even distribution. A condensate evaporator has been added to effectively manage condensate produced by the coil (up to 3 ounces of condensate per hour). The unit also utilizes a smart-metering TXV valve that efficiently manages the ow of refrigeration through the system to ensure optimal performance. In order to keep your cellar at 55°F, the condenser intake should not exceed 85°F. This makes interior installation ideal for Optimum Series units. Our Ultimate Series units are better suited for exterior installations.