The optimal set temperature for an air conditioner in a professional setting generally falls within the range of 72 to 78 degrees Fahrenheit (22 to 26 degrees Celsius).

This temperature range strikes a balance between maintaining a comfortable environment for occupants while also ensuring energy efficiency.

Setting the thermostat at a slightly higher temperature can help minimize energy consumption and reduce cooling costs.

However, it is essential to consider factors such as humidity levels and specific requirements of the workspace. In areas with high humidity, keeping the air conditioning at a lower temperature may be necessary to maintain appropriate moisture levels and prevent mold or mildew growth.

Additionally, occupant comfort should be taken into account, as individual preferences can vary.

Ultimately, regular monitoring and adjustment of temperatures based on both energy efficiency goals and employee satisfaction are crucial in determining the best set temperature for an air conditioner in a professional setting.