The most energy-efficient temperature setting for an air conditioner in the Philippine climate is between 24 and 26 degrees Celsius, as this range provides comfortable cooling without requiring the unit to work excessively hard to maintain a very low temperature. Every degree below 24 degrees Celsius increases energy consumption by approximately six to eight percent, meaning that setting the unit to 18 or 20 degrees Celsius significantly raises electricity costs without a proportional improvement in comfort. Using the air conditioner’s sleep mode or timer function at night, keeping doors and windows closed while the unit is running, and using an electric fan to distribute cool air more effectively are additional ways to maximize energy savings without sacrificing comfort.