Air conditioners have changed a lot over the years and some do a whole lot more than just cool the air as some may think! Here is a quick list that separates the must-have features from the gimmicky bells and whistles. There are a lot of decisions to be made when buying an air conditioner. This article is Part 1 of 2 on Air Conditioner Features and How to Buy and Air Conditioner. Personal Air Conditioners can be a great solution to cooling off very compact areas (think: cubicle). If you know of a small space that needs cooling, you should consider buying a personal air conditioner.