why am i getting cold water leaking on pasger/driver floorboard with a/c oper

What is your question?

I just purchased this vehicle and the first trip I took my daughter felt cold water dripping on her feet when I changed the vent mode and noticed the floor was really wet after about two hours. I could hear a noise coming from vent fan that sounded like it was hitting water every once in awhile. When we stopped I checked and noticed not only her side was wet but the drivers side was wet so I turned off the a/c and put down windows. when we returned home I dried the floor using my wet vac and let it air dry