The HVAC industry is undergoing a rapid transformation driven by the need for higher energy efficiency, lower emissions, and more sustainable solutions. This presentation introduces a new approach combining two key enablers: oil-free high-speed micro turbo compressors and low global warming potential (GWP) HFO refrigerants. Taking a broad system perspective, the session focuses on HVAC applications overall, explaining how combining advanced compressor technology with modern refrigerants unlocks significant system-level benefits, including improved heat transfer, reduced pressure losses, simplified design, and enhanced reliability. Oil-free micro turbo compressors eliminate lubricants from the refrigerant cycle, avoiding efficiency losses linked to oil circulation while enabling compact ...