In most cases, a window AC unit will use less energy when set to "low" mode rather than "auto" mode. However, it's important to understand the difference between these two settings:
Low Mode: When the window AC unit is set to "low" mode, the fan runs continuously at a lower speed. The compressor, responsible for cooling the air, will cycle on and off to maintain the set temperature. This setting keeps the fan running even when the compressor is not actively cooling, which helps in better air circulation and maintaining a more consistent temperature throughout the room.
Auto Mode: In "auto" mode, the fan and compressor work in tandem to maintain the desired temperature. The fan speed automatically adjusts based on the difference between the current room temperature and the set temperature. When the room reaches the desired temperature, both the fan and compressor will stop running until the temperature rises again.
Typically, the "auto" mode is more energy-efficient than the "high" mode since the fan runs only when necessary, conserving energy when the compressor is not actively cooling. However, in comparison to the "low" mode, the "auto" mode may consume slightly more energy, especially in situations where the fan frequently starts and stops as the room temperature fluctuates.
On the other hand, the "low" mode provides more consistent air circulation, which can help maintain a more even temperature throughout the room. This can result in a more comfortable environment without the temperature swings that may occur in "auto" mode.
In summary, if energy efficiency is your primary concern, the "auto" mode is likely the better choice. However, if you value more consistent airflow and temperature control, the "low" mode might be preferable, even though it might consume a bit more energy compared to "auto" mode. Ultimately, the difference in energy consumption between these two settings is often minimal, and it's essential to consider your comfort preferences when choosing the appropriate mode for your window AC unit.