I just purchased a kenwood a/c a couple of weeks ago it's a G130EK, 13,000 btu and it doesn't cool anything not even a 12 x 12 room. There is an opening that leads to a bigger room , but the smaller room should as least be cool. I keep it at 64 degrees and still nothing . The exhaust hose gets warm and when I go out side to check the exhaust I can feel hot air coming through. What's my problem . Hope you can help Thanks !!!!

SOURCE: dehumidify mode also cools

Some units do cool/dehumidify only im afraid why cant you let the unit dump its hot air into the room then it wont heat or cool the room?

SOURCE: Cool air when running; warm air when compressor is off.

It sounds as if warm outside air is being drawn back into the room when the unit is not actively cooling. Portable units depend on room air to carry the heat outside, & therefore will not work properly if the room is too airtight. Provide a makeup air passage by leaving the door slightly open, & see if this helps. Use a room thermometer to see if your desired temperature is being reached. Note that if the wind is strong & coming from the wrong direction, it may not be possible to prevent warm air drawback.

SOURCE: air exhaust hose gets extremely warm

The Pinguino's exhaust pipe has to be attached to the window bracket to direct the air hot air out of the room, otherwise the room can't cool properly.
The owner's manual has several troubleshooting remedies for you to try:
1)  If the window is open, close the window. 2)  If there is a heat source in the room (burner, lamp, etc.), eliminate the heat source. 3)  If the exhaust hose is detached, connect the exhaust hose.  (My recommendation is to connect the exhaust hose to the window bracket and direct the air outside.) 4)  If the air filters are clogged, clean or replace the filters.
Remedies that aren't mentioned in the manual, but you might find helpful:
1)  Make sure that there are no kinks in the hose, and that the hose either remains straight or has a gentle curve when directing it into the window bracket.
2)  A sunny window reduces the maximum power and efficiency of the unit.  Placing it in a sunny window reduces your BTUs by at least 600, which means the maximum square footage of cooled space is reduced.  Cooling a kitchen requires at least 4,000 BTUs alone, which is nearly half of the unit's BTUs.  Try to place the unit by a window that receives minimum to no direct sunlight.
Finally, stating the obvious, if the room isn't cooling, the room is too large for the unit.  The PACL90 cools up to 400sqft.  Bear in mind that the air from these portable air conditioners cannot move around corners very well, so try to set it by a window in the central part of the room.

SOURCE: Not cooling anywhere near what it claims.

Yes, you have hit all of the right points.
But in simple terms, air is like water, you can only move as much out, as you take in. So if the room is sealed, it does not have an air source to draw from. Even though the units have the exhaust port set correctly, they do not have a source to draw from. If the room is completely sealed, if they exhaust only, it will begin to create a vacuum in the room. Since these units are not powerful enough to create a negative atmosphere, they simply do not provide any cooling.

I use a portable Sharp unit in my server room. I do have a fresh air feed to the room, through a separate system. I have done a number of server rooms, and they are never completely sealed, they have air feed and exhaust systems. They just are not usually visible.
The reason the window unit worked so well is because it could draw outside air. With the way you have described these, no, they will not be as efficient, because they can't draw outside air.

So how do you fix it?
You can do like I did in my server room, and have a fresh air, filtered supply pumped into the room (or just in front of the cooling units).
Or, (and this is going to take a little engineering) put the cooling system in another room that can draw exchange air, and duct the cooled air into the room. Here again, you will need to have an exhaust system that will remove the hot air from the room.
If you baffle the supply line correctly, you will eliminate sound transmission.

The units you have, are good units, and very similar the Sharps I run.(they are probably built by the same people).
I have not found any recalls or complaints about the units.

SOURCE: Royal Sovereign not keeping the room cool.

electronics give off alot of heat you need larger unit