My bedroom is the top floor of a loft with 25 foot ceilings and far bigger than recommended square footage, so I just knew it was going to be difficult to cool my space. I figured I put it by my bed and not move much further than that. I placed it in the far corner of my room close to my bed, but to my surprise, this little machine cooled off the space exceotionally well, and it even cooled the floor below my bedroom. And we had three straight days of heat-advisory temperatures. I'm very pleased with this unit. It arrived in less than two days, and the hardest thing about set up was carrying it up the stairs and trying the thread the hose into the vents. But that was my malfunction. I love this unit, and it's made me a lot less discouraged about facing the summer.