I was using a standard fridge/freezer combo for a while. The thermostat was placed in the (larger) fridge part. The freezer portion temperatures could fluctuate widely though, from near freezing (after the compressor ran) to probably close the the fridge temp, 50-55 degrees. But I didn't really have much in there. With more mass, perhaps the temps would even out more, on the cooler side. Would just have to see!