When sourcing Inverter ACs, the price is heavily influenced by the Seasonal Energy Efficiency Ratio (SEER) or Energy Efficiency Ratio (EER); higher ratings typically command a premium but offer lower long-term operational costs. You must verify the compressor brand (e.g., Highly, GMCC, or Panasonic) as it is the core component affecting lifespan. Additionally, check for Gold Fin or Blue Fin anti-corrosion coating on condensers, which is essential for durability in coastal or high-humidity regions. Ensure the unit uses R32 or R410A refrigerant to meet modern environmental standards.