AKL has the sensors. My room was stuffy when I would return, but after going on the balcony to see animals immediately on return from parks and coming back in, it was noticeably colder. I mind being hot at night and don't remember having a problem. I assumed they used them there to be eco friendly, I don't know why they would install them in All their hotels. They are in Florida, providing relief from heat should be upper most.