Do You Need to Turn on the Internal Circulation When Using the Car's Air Conditioning?
1 Answers
Yes. The situations where internal circulation is needed are as follows: 1. During traffic jams: The more congested the traffic, the higher the density of exhaust fumes in the air. Turning on the internal circulation at this time can effectively prevent external exhaust from entering the car, thereby avoiding harm to the body. 2. In bad weather: When driving in dusty or sandy conditions, it is essential to activate the internal circulation. This not only prevents external dust from entering the car but also reduces the impact of dust on the air conditioning filter. 3. When cooling with air conditioning: In summer, when the air conditioning is on for cooling, turning on the internal circulation keeps the cold air inside and the hot air outside, reducing the load on the air conditioning and improving cooling efficiency. 4. When parked in an underground garage for a long time: If the car is idling in an underground garage for an extended period, internal circulation should be activated. Compared to the outside, underground garages have much poorer ventilation, and exhaust fumes can accumulate around the car if not quickly dispersed. Additional Information: Situations where external circulation is needed: 1. New car usage: After purchasing a new car, it is advisable to use the external circulation as much as possible to maintain airflow between the inside and outside of the car, helping to release harmful gases more quickly—similar to opening windows in a new house for ventilation. 2. Smoking in the car: For those who smoke in the car, it is important to turn on the external circulation while smoking, whether the car is stationary or moving, to ensure the smoke is quickly expelled. This not only protects your health but also reduces exposure to secondhand smoke for others in the car. 3. Long-distance highway driving: If internal circulation is used continuously, it can lead to insufficient oxygen inside the car, causing driver fatigue and increasing the risk of accidents. In such cases, switching to external circulation helps replenish fresh air inside the car.