Good question, and I really can't answer it with "yes" or "no". I did not but them in a fridge or other particularly cold place, and they spent the entire winter in their normal tank (which has ample space to burrow). However, the temperature in our house can get quite cool in the winter. I kept the heating pad on for part of the day, but always after a meal. Gradually, their appetite faded for a few weeks in the winter, and so I slowly minimized the amount of time that I left the heating pad on per day. I only left it completely off for a day or two. I slowly increased the number of hours with the heating pad on, and tested their appetite again. After they ate, I again made sure they had ample heat to digest. From there on out, they maintained their appetite.

So I never intentionally brumated them, but as their appetite faded, I allowed their temperature to drop a little. I also observed that one would utilize the hot side of the tank and the other the cool for much of the winter. I pretty much left it up to them, but the temperature never got anywhere near as cold as I imagine most people who intentionally burmate does.

Again, this is my first time, so I don't have enough experience to encourage others to follow this plan, but I would say it certainly worked well for me.