A:Answer I just got off the phone with the call center in India and I was told that the hose goes out the window in order to get rid of the heat generated by the motor inside the unit. Additionally, I was told that it is a "self evaporating" unit and the water can be emptied by hand out of the back of the unit. ALSO, I explained that I have a window that opens side to side and its 50 inches tall she said that the extension kit that comes with the unit has several parts and that it should work for my window. THEREFORE THE VENT KIT supposedly works for up and down windows, side to side windows, and or casement windows. And, YES you must remove the screen. I'm just hoping that whoever answered above didn't know what they were talking about and at the call center actually does. I get my unit in two weeks I will keep you all posted!