What is the appropriate temperature to set the car air conditioner heating to?

[MacMaddox]

It is appropriate to set the car air conditioner heating to around 22 to 26 degrees. The method to turn on the heating is: 1. After starting the vehicle, turn off the AC button; 2. Wait until the water temperature rises to the normal value, then turn on the air conditioner heating. The working principle of the car air conditioner heating is: when the engine's cooling system dissipates heat from the engine, the dissipated heat is sent into the car through a fan to form warm air. The functions of the car air conditioner are: 1. To adjust and control the temperature, humidity, air cleanliness, and air flow inside the car cabin to an optimal state; 2. To provide a comfortable riding environment for passengers and reduce travel fatigue.

[LukeLee]

As a veteran driver with over a decade of experience, I usually set my car's heating system between 20 to 22 degrees Celsius. This temperature range feels most comfortable - neither stuffy nor chilly inside the cabin. In winter, don't rush to turn up the heat immediately after starting the car. Wait until the engine warms up before adjusting to around 20 degrees, which prevents skin dryness and itching. During summer when using the heater, I typically set it below 22 degrees to save some fuel. Remember to adjust according to outdoor temperatures - for instance, set it 2 degrees higher when it's below freezing. Excessive heat can cause dizziness and affect driving concentration.

[EmilioFitz]

My family has elderly and children, so we pay great attention to the health environment inside the car. The optimal temperature for the heater is generally controlled between 18 to 20 degrees Celsius. Too high a temperature can dry out the air, causing throat irritation and discomfort, especially during long drives which can lead to fatigue. Many cars now come with humidity displays, and maintaining a humidity level of 40%-50% is crucial. I usually open the windows for ventilation for a few minutes before closing them and turning on the heater. For the elderly who are more sensitive to cold, the temperature can be set slightly higher, but not exceeding 24 degrees Celsius, as a large temperature difference can easily lead to colds. For active children, around 21 degrees is just right, as excessive heat causing sweating can be unsafe.

[DeZoey]

For those who are particular about fuel efficiency and vehicle longevity, setting the air conditioning or heating to 22-24 degrees Celsius is most reasonable. When the engine drives the AC, the load increases, and temperatures exceeding 24 degrees consume more fuel and cause machine wear. Automatic AC systems are quite intelligent—once the temperature is set, they adjust the fan speed automatically. For long winter drives, maintaining a constant 22 degrees provides the most stable comfort, avoiding sudden temperature fluctuations. Excessively high temperatures can also affect the heat dissipation of the exterior exhaust system. Regularly cleaning the AC filter can save fuel. Keeping the temperature differential within 5 degrees is optimal for engine health.

[McDonovan]

I adjust the temperature flexibly based on different driving scenarios. In traffic jams or at red lights, I lower it to 18°C for better ventilation. On long highway drives, I increase it to 23°C for more comfort. During snowy or rainy winter days with poor visibility, I set it to 20°C to stay alert. When there's fog, I avoid setting the temperature too high to prevent windshield fogging. I turn off the AC when parked to save energy. With more passengers, I raise the temperature by 1-2°C for added comfort. When it's below freezing outside, I set it to 24°C to prevent frostbite. For regular city driving, 20°C is sufficient, ensuring both comfort and safety.

[MiguelLynn]

Once you've experienced automatic air conditioning, you'll fall in love with its convenience. Just set it to 22°C and forget about it. The fan speed and mode automatically adjust, with interior and exterior temperature sensors making real-time adjustments. Modern systems can even predict traffic jams or highway conditions to automatically regulate temperature. Avoid setting the temperature too high to prevent catching a cold from drastic temperature differences. Cooling becomes more accurate after cleaning the filter. In winter, start with 20°C, and you'll feel comfortable within half an hour. For manual air conditioning, setting it to 22°C with medium fan speed ensures stability. Technology makes driving more worry-free.