Variable Refrigerant Flow (VRF) systems are turning into an increasingly popular HVAC solution for commercial construction projects around the country. They offer numerous benefits that can be acknowledged by architects, engineers, contractors, and end-users. A portion of the benefits incorporates energy efficiency, flexible installation, and local controls for end-users. I started my career by spending two years as a salesperson for a VRF manufacturer , and coming up next are a few perceptions I made during that time about issues that commonly caused problems during installation. Two Common VRF System Installation Problems Refrigerant piping Refrigerant piping in a VRF system resembles the piping or ductwork of traditional air or hydronic systems and is one component where slip-ups are commonly made in light of the fact that the installation is different for each system that is introduced. Manufacturers of VRF systems have design programs that will produce piping outlines that ...