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Group 1: Air Conditioner Selection - The size of the air conditioner should be determined based on the room area, with different power ratings (in HP) corresponding to specific cooling capacities [1] - A reference table is provided to match the appropriate HP with the room size to avoid over or under-sizing the air conditioner [1] Group 2: Energy Efficiency - Understanding energy efficiency labels is crucial for evaluating air conditioners, which indicate energy consumption and efficiency levels [2] - Energy efficiency is categorized into five levels, with Level 1 being the most efficient and Level 5 being the minimum standard for market entry [4] - The APF (Annual Energy Consumption Efficiency) value and CC (Rated Cooling Capacity) are important metrics for assessing energy savings [6] Group 3: Inverter vs. Non-Inverter - Inverter air conditioners are recommended due to their superior cooling speed, precise temperature control, lower noise levels, and energy efficiency compared to non-inverter models [7][9] - Non-inverter models have less accurate temperature control and higher noise levels, making them less comfortable for users [9] Group 4: Air Conditioner Lifespan and Replacement - The recommended lifespan for air conditioners is 8 to 10 years, and consumers are advised to replace them before they fail [10] - The government offers a "national subsidy" policy for replacing old air conditioners, with significant funding allocated for consumer incentives [11][14] - Consumers can receive subsidies based on the energy efficiency level of the new appliances, with specific limits on the amount per item [14]