Wine Cellar Cooling systems are cooling equipment that are totally different from an ordinary air conditioning unit as it is specially designed to be used exclusively for wine cellars to achieve constant temperature and humidity levels needed in preserving wines and letting them age gracefully. Different wine cooling units come in varying sizes, types, operating temperature and humidity ranges, installation requirements, noise levels, and other specifications. A proper wine cellar door is also critical to your wine cellar as it will keep in the cooler air and humidity. By Coastal Custom Wine Cellars.