Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: where does the water go
Document: This is the worse air conditioner at first we could not connect this hose into the back of the unit, had to go out and get duct tape because contrary to  the direction the hose connector does not click into place and when the hot air blows out through it the hose will pop out from the back of the unit and the window and while we were at church it happen , so when we returned the house was hot from the hot air and water was all over the floor.
We think buying units locally will be much better for us, because we have gone yet another week without AC in the Arizona heat waiting to get to this point. So off to Home Depot and Lowe's we go.
I was on vactaion that week and the temperature was running between 95-100. I am so glad I decided to go with this unit, the remote control is an added plus. It has a lot of features for the money and I am loving it.
I. Love. This. Thing. I set a timer on it every night to go off after 3 or 4 hours (helps save some money for electricity). After I have this thing on for about 5 minutes, my room starts getting super cool. This machine may have been a pain to set up, but so far it's been worth it.
I don't think that it would cool off a bigger room, but it does a really nice job on my master bedroom. The sun hits this room and the air conditioner in the house has trouble keeping my one room cool. I solved the problem with this, and didn't have to go buy it at the store and pay for a truck to deliver it.
There is enough "over-hang" where the plastic hose is inserted on each end to use a radiator clamp to make a tight connection... And because duct is insulated,  virtually all of the heat is vented outside....The insulated duct is not nearly as clean looking as the original plastic expansion duct, but I can go 8 feet from the window and when the weather cools, I might consider a more decorative secondary covering...
If you go outside and put your hand in front of the exhaust vent, it's Blasting hot air out. It's almost too hot to keep your hand in front of it.And it's loaded with features:  sleep mode, auto mode, fan mode, plus remote control. Has sweep mode where the louvers move up and down automatically. Plus dehumidify mode.Overall I'm very happy with it. Just wish it was a little smaller.
I will state a couple of positives first. It cools fast and it's relatively quiet. There you go. Now worst to first. Set-up with the window adapter, exhaust tube and connecting it to the back of the unit took me an hour! I'm no Joe-contractor, but I've taken apart and put together enough things in my life to know that this is a total duct-tape job at all three points.
The Koldfront portable A/C is fantastic! Why waste money cooling an entire home if you are mainly using one room? We turn the main A/C on for the whole house about 30 minutes a day, and then it is off! We have one portable for the front living area and one for the bed room. We placed a sliding wood panel to go over the screen on the window outside over the hose opening in case of rain.
Have been using for about a month, with no problems or complaints. Easy set-up, no dripping water. I have had none of the problems listed in other reviews, and was concerned. But I have no problems at all.
Answer: If your are using to de-humidify, the reservior tray will need to be set up underneath the bottom or middle hose outlet in the back.  Otherwise, if strictly using in AC mode, the water gets evaporated/recycled as additional coolant within the unit.  We've used the unit all summer in NYC temps and humidity in AC mode and had no issues with drainage.  But depending on where you're located, you may have to run the unit in humidity mode in addition to AC mode -- if so, you'll have to empty the tray every few hours or so.  Hope this helps.