In the context of EPA 608, what does retrofitting mean?

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Retrofitting means converting an existing refrigeration system to use a different refrigerant that has lower ozone depletion potential and, often, lower global warming potential. This change aims to reduce environmental impact while keeping or restoring the system’s cooling performance. The process can involve more than just swapping fluids; it may require updating lubricants, seals, and other components to ensure compatibility with the new refrigerant and its operating pressures. It’s not simply about installing a new compressor, mixing refrigerants, or reviving an old system with oil—the core idea is changing the refrigerant to a more environmentally friendly option.