What Type of Airflow to Use for Defogging Windows on Rainy Days?

[VonVivienne]

When defogging car windows on rainy days, using the hot air conditioning is the most effective method. Additional information is as follows: 1. Introduction: The car air conditioning system is a device designed to cool, heat, ventilate, and purify the air inside the vehicle compartment. It provides a comfortable environment for passengers, reduces driver fatigue, and enhances driving safety. 2. Configuration: The arrangement of air conditioning systems varies depending on the type. Passenger cars commonly use an integrated heating and cooling air conditioning system. This configuration typically combines the evaporator, heater core, centrifugal blower, and control mechanism into a single unit, known as the air conditioning assembly.

[IkerMarie]

As a seasoned driver with years of experience, my biggest headache when driving in the rain is foggy windows obstructing visibility. That damp, misty feeling is incredibly frustrating, so I always immediately turn on the heating mode, setting the temperature to around 25°C, and direct the airflow toward the windshield. I also press the AC button simultaneously to activate the dehumidification function, allowing the cold air to absorb moisture inside the car and prevent fogging. The fan speed should be set to medium—not too high to avoid excessive noise. Once, during a rainy traffic jam, my windshield fogged up so badly I almost rear-ended the car in front. Thankfully, I quickly activated this routine, and the fog cleared within seconds. I also recommend keeping a dry cloth in the car for quick wipes and slightly cracking the windows to improve air circulation. Avoid leaving damp items like umbrellas or wet clothes inside, as they increase the risk of fogging. Overall, combining warm air with dehumidification is the safest and most reliable solution.

[LaLilah]

Foggy windows on rainy days are extremely dangerous, severely affecting safe driving. I prioritize this issue and always address it immediately when encountered: without hesitation, turn on the warm air to blow on the windshield, set the temperature high (e.g., 27°C), and increase the fan speed to allow the hot air to disperse quickly. The key is to press the AC button to activate the compressor, which helps absorb moisture inside the car and prevents cold air from blowing directly, as this can worsen the fogging. If the rear window is also foggy, turn on the rear defroster switch simultaneously. When parking daily, I try to park the car in a cool, dry place to avoid moisture buildup and regularly check if the cabin air filter is dirty, as this can hinder dehumidification. Safety comes first—poor visibility due to fogging can easily lead to accidents. This method is simple and effective, ensuring safe driving.

[SanIsabel]

The most practical way to defog the windshield on rainy days is using warm air. Here's my usual driving habit: turn the fan speed higher, set the temperature around 25°C, and press the defrost button on the steering wheel to direct airflow at the windshield. Remember to turn on the AC for faster dehumidification. The fog clears in just over 10 seconds – super simple. You can also slightly open the external circulation to assist ventilation. Avoid smoking or eating inside the car during rain to prevent adding moisture and odors. A simple routine to solve daily hassles.