Intake Control (12)
The intake control button is used to select Fresh air mode (outside air) or Recirculation mode (cabin air).
Recirculation Mode

In recirculation mode, air from the cabin is recirculated through the system and heated or cooled according to the selected function.
Fresh Mode

When Fresh air mode is selected, air is drawn into the vehicle from outside and heated or cooled according to the selected function.
Information
Operate the system primarily in Fresh air mode. Use Recirculation mode only temporarily when necessary.
Operating the heater in recirculation mode for a long time without turning on the air conditioner may cause the windshield to fog up.
In addition, prolonged use of the A/C with recirculation mode selected may result in excessively dry, dehydrated air in the cabin and may contribute to a stale ventilation odor due to stagnant air.
WARNING
- Continued use of the climate control system in Recirculation mode for a long period of time may cause drowsiness in the vehicle occupants. This may result in loss of vehicle control, which may lead to an accident.
- Continued use of the climate control system in Recirculation mode with the A/C off may increase humidity inside the cabin. This may cause condensation to form on the windshield and reduce visibility.
- Do not sleep in or remain parked in your vehicle with the windows up and either the heater or air conditioning running for extended periods of time. Doing so may increase the level of carbon dioxide in the cabin, which can result in serious injury or death.
Test yourself
A quick Hyundai Palisade quiz: every answer comes with an explanation and a link to the manual page.