When comparing prices, you must verify the compressor type (Semi-hermetic, Scroll, or Screw) and the cooling capacity (kW/HP). Ensure the unit includes original Bitzer compressors rather than refurbished ones, as this significantly impacts the price. Key technical factors include the evaporating temperature range (High, Medium, or Low temperature), refrigerant compatibility (R404A, R134a, R407C, etc.), and the condenser type (Air-cooled vs. Water-cooled). A complete unit price should ideally include the oil separator, suction accumulator, pressure controller, and electrical control box.