Defogging with Cold Air or Warm Air?
2 Answers
Both warm air and cold air can be used for defogging, but cold air works faster, though it may cause secondary fogging. Warm air defogs more slowly, but there's no concern about secondary fogging. Introduction to the car defogging system: 1. The rear windshield defogging relies on electric heating wires, while the front windshield cannot be equipped with heating wires, so the front windshield uses the car's air conditioning for defogging. 2. There are air vents below the front windshield of the car, which are used to blow air onto the front windshield. On the car's air conditioning control panel, there is also a windshield defogging button.
Every time I drive on rainy days, I encounter foggy windows. After pondering for a long time, I realized that both cold and warm air can defog the windows, depending on the situation. If you need to defog quickly, turn on the cold air—it works fast. Just press the defog button or lower the air conditioning temperature. The cold air reduces the window temperature, and the fog dissipates instantly. However, using cold air in winter can make you shiver, so switching to warm air is more comfortable. Although the fog might initially worsen when warm air is blown, it clears up in two or three minutes. A quick reminder: whether using cold or warm air, remember to turn on the A/C button—it dehumidifies, which is the key to defogging. Another handy tip is cracking the window slightly for ventilation, which can also prevent fogging and is more fuel-efficient than relying solely on the air conditioner.
