Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: does this unit have a vent kit? Does it need one and how much extra would it cost?
Document: End of issue. My ONLY complaint about the unit is that the vent hose is too short. It is only about four feet. Not very "portable" IMHO if you can only move it a few feet from the window in which you vent it.FYI: 90% of all after market vent hose extensions suck. Be careful if you go this route. Many are paper thin, which allows too much heat transfer back into the room, and then easily tear because they are cheap.
I can't imagine why they didn't design it with two hoses, one for intake and one exhaust. It's like leaving a window open while a window air conditioner is running. This may not be as bad in dry climates, but in humid, the water vapor gives up a lot of BTUs when condensing to a liquid which the unit must then remove, rather than cooling that much more air.I put it on a small table so it can drain into a 5 gal.
I leave my house central AC at about 75 everyday and keep this unit going in the area where I need it most - and it covers that are and most of the rooms connected to that area.The unit arrived quickly and without problem. When I opened the box, a caster has broken but it was s small thing - but the vendor was very gracious about replacing it immediately. I'm very pleased with this purchase and would highly recommend it to anyone wanting an efficient and affordable portable AC.
I do not have many outlet options in my apartment and since the cord is so short it's pretty much stationed to one outlet that barely reached a window for the exhaust.FYI: I have the old school crank windows that open left to right that force me to leave the window open all the time for the exhaust to exit. I had a piece of thick plexi glass cut to the size of my window with a 6x6 inch square cut out of one corner so the exhaust can escape.
I love this product. It has 4 modes (Cool, Fan, Dry and Energy Saver) and all of them work perfectly! I'm using it in my bedroom which is big and it lowers the temperature to 60F in any of its modes. I got it one month ago and so far, I haven't had any real problem with it. The only thing is that the water container gets full every 20 minutes approximately, when the humidity is around 78% so I would like this container a little bit bigger.
It has a good solid vent hose and a washable filter that is easy to get to. I have a slider window so I can't mount a permanent AC unit and also it is not my house so this is a great solution. It is a way to change the area you want to cool also. It is heavy and large but is on wheels and it's not whisper quiet but it is basic white noise and easy to sleep through.
This puts a suction on the room and hot outside air is sucked into room to replace the cooled room air exhausted. That additional hot muggy air must be cooled and dehumidified. Of course, to cool the extra air coming into the room the AC blows out more cooled room air and suck in more hot outside air.Can this be true; portable AC sucks... hot-air.How much hot air is sucked in-a very large amount. An amount equal to hot air exhausted.
The unit fills with water every couple of hours and shuts itself off. I have to ask my husband to empty it since I am 9 months pregnant and the machine is too awkward and bulky for me to deal with. The unit takes up too much room in storage during the off-season. I do not recommend this product.
I love this air conditioner. It came out of the box ready to use and cooled the house down quickly. The water does need to be drained on a daily bases. and you need a low  walled bowl or lid to drain it. It also drains slowly but I still love it.
When the water tank gets full, it shuts itself off, so no mess to clean up. It is also very easy to fit the exhaust vent into the window when I want air conditioning and take it out when I want fresh air. Overall, I am very happy with this purchase. It does exactly what I wanted it to.
Answer: It did come with a kit and I didn't need to purchase anything to make it work. Very reliable unit over only one summer in but very high on power consumption. Overall very pleased.