Portable AC Recommendation?
Look at one that has two pipes, an intake and an exhaust. The ones with only an exhaust are actually causing indoor air to go outside, and pulling outside air in. Since the compressor and condenser are in the unit, they need to be cooled so the resulting hot air needs to go outside, but it's very inefficient if it's using indoor air to cool it as this air needs to be replaced. That only occured to me after I bought my 1 ton unit. I modified it so it takes outside air to cool the compressor and increased it's efficiency like 4x. Some are designed like this, so that's your best bet if buying one.