I'm not up on cooling systems, but if it's just for one room, it would probably be a window unit rather than central cooling.
I wish I knew what part of the Middle East you are in. I tend to think of most of it as being hot and dry. If so, maybe an evaporative cooler would work. They are easy on electric bills, but won't work in humid regions.
Navigator, you need an avatar. I still like the baby that I first saw you with.