What is the most fuel-efficient temperature for car air conditioning?
2 Answers
Setting the car air conditioning to around 26°C with the fan at the second speed is the most fuel-efficient. If the air conditioning temperature is set to the lowest, the compressor will run continuously, and the blower will operate at a high speed, which does not save fuel but instead increases consumption. Here are some methods to save fuel when using air conditioning: 1. Choose the right timing: Generally, it's best to turn on the air conditioning after letting out the hot air first. 2. Direct airflow upward: When using the air conditioning, direct the airflow upward since cold air sinks and can neutralize the rising hot air, resulting in the fastest cooling. 3. Alternate turning it on and off in city driving: Frequent stops and starts in city traffic consume the most fuel, as the engine struggles to dissipate heat, and starting the car or the air conditioning requires significant power, leading to higher fuel consumption. 4. Accelerate gently after turning on the air conditioning: When the air conditioning is on, smaller engines may experience noticeable power loss. Avoid pressing the accelerator too hard to compensate, as this increases fuel consumption without improving speed. 5. Switch between recirculation and fresh air modes: Periodically switch between recirculation and fresh air modes to ensure proper air circulation.
I think setting the car air conditioning between 22 to 24 degrees is more fuel-efficient. Many people don't realize that the AC temperature directly affects fuel consumption, mainly due to the compressor's workload. When the AC is on, the compressor consumes engine power, and the lower the temperature setting, the longer the compressor runs. I usually set the temperature around 24 degrees and increase the fan speed, which maintains a balanced cabin temperature without keeping the compressor running at high speed constantly. Also, remember to open the windows for ventilation to cool down the car first before closing them and turning on the AC, to prevent the compressor from running at full load immediately. Pay attention to the recirculation mode too—use internal recirculation in the city to reduce hot air intake, and external recirculation on highways for better air quality. These small adjustments can save nearly half a liter per 100 kilometers, which adds up to significant savings over time.
