Cozeware is stepping into the home cooling market with a new line of ductless mini-split air conditioners. What Is a Ductless Mini-Split, Exactly? If you’re unfamiliar with the term, here’s a quick rundown: a mini-split (or ductless AC) consists of two parts. The U.S. Department of Energy has reported that ductless systems can be 20 to 30 percent more efficient than window units and traditional ducted systems. Sources: 9to5Google — Cozeware ductless mini-split coverage | Android Authority