The heating wires are completely insulated and should never be exposed to air. Especially since it will rarely be moved. The temps are not high enough to cause any heat damage and the temp stays very steady. The warm side I measure under the hide, since that is where Soku spends most of his time. it covers exactly half of the tank bottom and is kept underneath the tank. I did wander about stress from the larger tank but have seen none of the classic signs...or even any that may be unique to him. I used my logic to overcome some of issues that I see with traditional care and research intently until I am satisfied with my choice. I also spend much time observing so that I am aware of anything that may be bothering him and what he prefers. I am always happy to add to the quality of care but rarely take away after some time if it is working well.