I used something similar in a small room in our house. Yes, the drier the climate, the more effective. Were you going to use this in your car when driving? My concern there is the water tank. I would be worried about the water splashing around while driving. Not so much about water on the carpet, but water getting into the electricals of the cooler itself. think these are meant to be stationary when operating unless it is designed otherwise. Just a thought.