No, Its hot at the hot end. Its not like there is a breeze in there lol. But the hot air escapes at the hot end, so the cold end stays cooler.
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I just found when i was setting it up that I had trouble getting a globe that would make the basking spot hot enough, without making the whole enclosure to hot. Its quite well insulated and even with the vents in that position the thermostat has to kick in to keep the enclosure cool enough. But then, its a four bay.. so there is extra heat with them on top of each other..