65438+ 10 The air conditioner is turned on in the library. The most comfortable temperature for human body is 26 degrees. If it exceeds 28 degrees, you can turn on the air conditioner, and the temperature should not be too low. Opening hours depend on the number of people. If there are few people, you can turn off some air conditioners appropriately. When there are many people and the temperature is high, you can consider opening it more or fully, and the temperature should be controlled at around 27℃.