Well I keep our apartment 68-72 degrees and I know even that isn't cold enough for my bunny lol. He sits in front of the fan most of the time he is out or lays directly under the A/C where its freezing. In the winter he lays on the tile floor next to the door that isn't sealed well so its pretty icy. He usually feels like a popsicle but I guess that is how he likes it.