A line set consists of two copper pipes that connect the indoor air handler to the outdoor condenser unit. These pipes are responsible for circulating the refrigerant that carries heat into or out of your living space. We offer a variety of Insulated Copper Line Sets in lengths ranging from 15 to 50 feet. Proper insulation is vital to prevent condensation and ensure the system maintains its rated efficiency. When choosing your line set, you must match the diameters to your specific unit, such as our 1/4-1/2 installation kits. For a faster setup, many customers choose our DIY collection which features pre-charged connections. It is important to handle these copper lines carefully to avoid kinks that could restrict refrigerant flow. Using a Decorative Line Cover will protect the copper and insulation from UV damage and weather. This component is the "veins and arteries" of your entire mini-split system.