This isn’t recommended, due to the design of most freestanding wine coolers like the Ivation 18 Bottle Dual Zone Thermoelectric Wine Cooler/Chiller. These kinds of coolers are made in such a way that excess heat is dissipate via the rear of the unit, so they generally a bit of air and space behind them for the process to work effectively. If you place a freestanding wine cooler under a counter, you’re effectively blocking off its ventilation and giving the heat no space to escape. This will force the unit to work harder and put the cooler at a greater risk of a fault or failure. You’ll also be risking invalidating the warranty.