What is the ideal temperature for car air conditioning in summer?

[McLiam]

During summer, the car air conditioning can be set between 21-25°C, while in winter it can be set between 25-28°C. The temperature difference between the interior and the external environment should not be too large, as it may cause discomfort to passengers. Generally, the temperature difference between the inside and outside of a car should be within 10°C for sedans and 8-12°C for large buses. Below is an introduction to the working principle of the air conditioning system: After the engine starts, turn on the A/C switch, the electromagnetic clutch engages, transferring the engine's power to the compressor. The compressor circulates compressed refrigerant to the evaporator, where the refrigerant vaporizes, absorbing heat and producing cold air. The blower then delivers this cold air into the cabin.

[JordanLee]

When it comes to using air conditioning in the car during summer, I have deep personal experience. I often see people setting the temperature as low as 18°C for quick cooling, only to end up catching a cold or even getting headaches after getting out of the car—it's really not good for the body. I recommend keeping it at 24-25°C, as a moderate temperature difference helps avoid harm. First, open the windows to ventilate before closing them and turning on the AC, which prevents excessive humidity inside and makes it feel more comfortable. If the air feels too dry or stuffy, try switching to a bit of fresh air mode (external circulation) instead of keeping it on recirculation, which can accumulate dust. Health is a big concern—prolonged exposure to extreme conditions can weaken immunity. It’s best to use auto mode or manually adjust the airflow for even cooling. In short, a moderate temperature ensures safer trips for the whole family, especially for kids and elderly passengers in the back seats—don’t let them get too cold.

[LiamRose]

I think setting the air conditioning at around 26°C in summer is the most practical choice—it saves fuel and is environmentally friendly. Running the AC compressor at high levels increases engine load, causing fuel consumption to spike, especially in traffic jams where it becomes more costly. I often notice strong jerking in the car when the AC is set too low, indicating significant energy waste. Adjusting to a slightly higher temperature, like 26°C, ensures stable operation with fewer shutdowns, making it both comfortable and economical. When starting the car, don’t rush to turn on the cold air—first, briefly open the windows to release hot air, then close them and adjust the temperature. Also, remember to clean the AC filter regularly, as dust buildup can reduce efficiency. Energy saving isn’t just about cutting costs; reducing emissions also helps the environment. With global warming worsening, contributing even a small effort while driving is worth advocating. Over time, this approach keeps both your wallet happy and eases the burden on our planet.

[DeIsla]

Having driven for several years, I never set the AC too low in summer—22-24°C is just right to avoid distraction. Excessive cold makes me drowsy and yawn, impairing focus and posing driving risks. Once on the highway at 18°C, I shivered so badly I nearly crashed before quickly adjusting it higher. Avoid directing AC airflow at eyes or face to prevent obstructing visibility. Around 24°C maintains balanced cabin humidity, preventing windshield fogging—safety first. Use auto AC or dual-zone controls (e.g., 24°C upfront, slightly warmer in back) for family comfort during drives. Moderate temps also reduce fatigue, ensuring steadier long-distance driving.

[OwenRose]

I prefer setting the AC to 25°C in summer for optimal comfort, as there's no fixed rule—it's all about personal preference. When the car gets unbearably hot, I first roll down the windows for a few minutes to let the heat escape before closing them and adjusting the temperature. 25°C with medium fan speed provides sufficient cooling. With more passengers, I raise it to 27-28°C to prevent those in the back from feeling too cold. Initially, I use the external air mode for rapid cooling before switching to recirculation mode to save energy. The ideal temperature depends on how hot it is outside, but 25°C generally offers balanced comfort without sudden chills or overheating. Remember to clean the AC system regularly to prevent mold from affecting air quality. Driving should be about relaxation—focus on finding a comfortable temperature rather than obsessing over minor details for a more enjoyable ride.

[Octavian]

I believe setting the car air conditioning between 24-26°C in summer is most ideal, offering balanced comfort and efficiency. Temperatures too low, such as below 20°C, are not good for the body and may even cause heatstroke due to the large temperature difference when exiting the vehicle. I recommend first turning on the fan to expel hot air before activating the cooling, setting it to 24-26°C to reduce compressor load and lower fuel consumption. A temperature difference within 10°C between the inside and outside of the car is appropriate, using auto mode to maintain stability. Direct the AC airflow towards the body but avoid strong blasts to prevent skin dryness. Regularly check refrigerant levels to prevent efficiency drops. This temperature setting ensures both health and energy savings for a more worry-free drive.