This is my 3rd LG portable AC unit. My room is 360 square feet.  My 10,200 BTU unit just wasn't cooling down the room quick enough. I purchase this 14,000 BTU online from ABT, since Sam's was out of stock.  BOY, what a AC!  It cranks down the temp in less than 20 minutes. Amazing performance. The quietest unit yet.  The wifi connection is a cool perk. I can turn it on/off from my cell. Only lacking performance is the remote. It's line of sight.