http://thesweethome.com/reviews/best-air-conditioner/
"After spending the past four summers researching window air conditioners—including more than 20 hours testing units in a 1930s East Coast apartment with a dated electrical system—we’re sure the best model for most rooms is the Frigidaire FFRE0833Q1 ($239). This Frigidaire is as efficient and powerful as any of the best window air conditioners of its size, offers more useful features than the competition, and, at a relatively manageable 48 pounds, it’s lighter and easier to install, too."