I use this to cool my home office space, which is about 165sq ft, and this thing has no problem cooling the space. I also move it into my bedroom at night , which is about 250 sq ft, and it will cool that space pretty well, better than I expected. Its a little noisy, but that always been my experience with A/C units. They're inherently just noisy. Over all. Good bang for the buck. I would buy it again.