I bought this unit to cool mine and my wife's bedroom at night. It didn't make sense to me to cool the entire house when we we were only using that small (around 144 sq. ft) bedroom. What I love best about it is price, quality, and ease of operation, and the fact that it is saving us money on our utility bill. We purchased a small Haier deep freeze several years ago and it has been really great, so I thought I would try a Haier window unit. I believe I made the correct choice.