Bests & Worsts Reviews from Amazon

I didn't do enough research on portable air conditioners. I now understand there are two kinds: portable air conditioners, and "extenders". Here's what I mean: if it has two hoses, one for intake and one for exhaust, that's an air conditioner. Put it in a room, hook up both ducts, it will cool if hot outside. If only one hose, that's an extender. Hook it up, in a house that is air conditioned with say a hot corner, it'll take in cool room air, cool it some more, and exhaust. Some of what is going out the exhaust is air from inside the house. Some of your cool gets away. But, it also creates negative pressure by exhausting from inside the room, and that will draw air from somewhere. If from another portion of the house that's already cool, great! If from outside and it's hot - you're trying to fill a leaky bucket. I know all this because I bought this Honeywell, which is single hose. A friend has a double hose DeLonghi, and it's a vastly different machine. Both same BTU rating, but the Honeywell just can't keep up once temps hit 80 degrees. BUY A DOUBLE HOSE unit, even if costs a bit more. You'll be much happier.