After winter frosts and snows melt into spring slush, we welcome the heat of summer... to a point. A 6,000 BTU air conditioner is the perfect size for a bedroom, small play room, or home office, and will generally suit small rooms up to 250 square feet (read more about air conditioner sizes here). Although there are lots of cheap air conditioners out there that tend to pop up in stores around the summer months, choosing an AC unit from an established brand can ensure that you end up with a model that is quieter, energy efficient, and more reliable.