exposure to some pollutants and allergens. The cabin air filter also plays an important role in filtering particles that enter through the ventilation system.
The Hidden Risks of Overusing Recirculation
Despite its advantages, recirculation should not necessarily be left on
continuously. The cabin is a relatively small enclosed space, and moisture and carbon dioxide produced by occupants can accumulate when there is limited fresh-air exchange.
Foggy Windows
In cold or rainy conditions, recirculation can contribute to window fogging because moisture from occupants’ breathing and wet clothing remains inside the cabin.
Humidity can increase.
Windows may fog more easily.
Visibility can
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