I have a window unit in my trailer. It freezes me out at night, no matter what setting I put it on. In the hottest of Texas summer days, it only goes up to about 78 to 80 degrees inside the trailer. Since that sucks out the humidity, it really isn't that uncomfortable. The water does splash back up and cool the system. I have never had any problem with water coming into the camper. When driving home from a trip, there is sometimes a small bit of water directly underneath the AC. I put a towel on the bed, and one of those plastic container lids to catch it. Has never really been a problem though. I only see water dripping outside the trailer during the most humid of days.