 These companies do have a lot in common, but it's the people at Charlie's Air Conditioning and Heating in Carterville that set them apart. Yeah, they're your friends and neighbors working hard every day just like you. They know what it takes to earn a living here in Southern Illinois. And that's why Charlie's will always put people over the bottom line. At Charlie's, they still like doing business the old-fashioned way. Hard work that goes above and beyond everyone else.