3. Install a wine cooling unit. These are not the same as normal cooling units, because they also control humidity. They can’t add humidity to the room, but they can remove excess moisture. There are many different products and methods you can use to cool the space, but the easiest is a through-wall unit like a Koolspace KoolR, pictured here. It works using a simple premise: creating a cold room on one side of the wall and a warm room on the other.
Units like these are installed simply through the framing of the wall. The unit cools and controls humidity in the cellar, while exhausting heat into the exhaust room that I mentioned before. The exhaust room has to be large enough to absorb this heat.