Mini Split Line Set: What Is It, and What Size Do You Need? Mini splits provide an efficient way to cool and heat a room without the expense and energy losses associated with ductwork. However, one important component of a ductless mini split system is the mini split line set. In this article, we discuss what mini split line sets are, and how to determine the right […] Read More of "Mini Split Line Set: What Is It, and What Size Do You Need?"