The powerful global movement toward a more sustainable but technologically advanced built environment is a key driver for VRF system adoption. As architects design high-performance buildings to satisfy the requirements associated with LEED®, Green Globes®, Passive House, ZeroNet Energy (ZNE), deep-energy retrofits, and ambitious sustainability goals set by governments and private entities, the need for VRF technology as an energy-efficient HVAC system has become more widely recognized.