Line-set integrity refers to the quality and insulation thickness of the copper tubing that connects the indoor and outdoor components. Our Installation Kits feature high-grade, pre-flared copper that is designed to withstand high-pressure R410A or R32 refrigerants. For a Tri-Zone system, maintaining this integrity is the only way to ensure the system operates at its rated SEER efficiency. We highly recommend using Line Set Covers to protect the insulation from UV rays and physical damage from pests. Whether you are installing a Bravo Milano 18,000 BTU Universal Floor/Ceiling or a smaller unit, the quality of the lines is paramount. Poorly insulated lines can lead to condensation dripping inside walls and a significant loss of cooling power. Investing in the right materials during the install phase prevents expensive repairs down the road.