Cold Air or Warm Air for Windshield Fogging?
2 Answers
If you are defogging in winter, you need to use warm air. If you are defogging in summer, you need to use cold air. Here are some related tips: 1. When defogging, it is recommended to turn on the external circulation mode. This can quickly expel the water vapor generated by passengers' breathing from the car, preventing the windshield from fogging up further. 2. The defogging of the front windshield relies on the air conditioning system, with air vents located below the windshield. The rear windshield defogging relies on heating wires, which are the thin lines visible on the rear windshield. The heating wires for the rear windshield will automatically turn off after a certain period to protect them, a design feature found in most cars. 3. When using the air conditioning to defog the front windshield, it is advisable to set the fan speed to maximum for quick defogging. Windshield fogging occurs due to a significant temperature difference between the inside and outside of the car. To quickly eliminate fogging, the simplest method is to roll down the windows. 4. To prevent windshield fogging, you can use anti-fog sprays, which prevent tiny water droplets from accumulating on the glass surface. Once the windshield fogs up, it is crucial to defog it quickly to avoid obstructing the driver's view, which could lead to accidents. When fogging occurs, reduce your speed and carefully observe the road ahead to prevent accidents.
I often encounter the issue of windshield fogging while driving. In such situations, I choose between cold or warm air defogging based on weather conditions and comfort. During hot summer days, I turn on the AC cold air mode with medium fan speed, which quickly lowers the glass temperature and dehumidifies, clearing the fog within seconds. However, in cold winters, warm air is more suitable. Although it may initially worsen the fog slightly, once the warm air stabilizes, it effectively dries out the moisture while keeping the cabin warm. For daily maintenance, I use the air conditioning's dehumidification function or external circulation to maintain dryness and prevent recurring fogging. A helpful tip: quick actions at traffic lights, like slightly opening the windows for ventilation, can effectively prevent fog buildup and ensure clear visibility.
