Selecting the right refrigeration system requires a balance of cooling capacity, energy efficiency, and environmental compliance. Buyers must first determine the temperature range required: chilled (0°C to 15°C) or frozen (-18°C to -25°C). It is critical to prioritize units with high-density polyurethane (PU) insulation (at least 40kg/m³) to minimize thermal loss. For commercial reliability, ensure the system uses reputable compressor brands like Copeland, Danfoss, or Bitzer, which offer global maintenance support and superior longevity.