CellarPro's 6200VSi 1/2 Ton Nominal wine cellar refrigeration system combines outstanding performance, adjustable humidity control and variable-speed fans for super-quiet operation. CellarPro's 6200VSi should be used for interior through-the-wall or ducted wine cellar installations. The cooling unit is designed to handle extreme environments ranging from 40°F to 110°F. For installations in environments down to 20°F, we recommend adding our compressor heater modification to the cooling unit. Below 20°F, the cooling unit's performance will begin to degrade. The cooling unit can be located remotely and ducted with our front duct kit, rear duct kit, bottle probe and remote control accessories. With our duct kits, the supply and return airflows can be ducted up to 100 equivalent feet (50 feet per duct) without an inline fan, or 200 equivalent feet (100 feet per duct) with an inline fan.