Hey I need some advice, My cage is on top of a dresser on the left side of the dresser is the air vent blowing A/C, The right side just has another terrarium.(for the iguanas) So since the left side of my cage will be cooler anyways do you think I sould keep that the cool end? Or do you think the A/C would make it too cold? ( Inside info: That vent does blow some COLD air )

Or should I try to fluctuate the temp and make the warm side where the A/C is
and the cool end where the other terrarium is?