Your Hyundai car has a mode (in the area of the legs / in the area of the head), This allows warm air to flow through the vents to the feet at the same time, and cooler air through the vents to the upper part of the cabin. To enable this mode:
Set the air intake mode selection switch to outdoor air intake mode.
Set the ventilation mode selection knob to (in the area of the legs / in the area of the head)
Set the air temperature control knob between positions "Cool" (Cold air) And "Warm" (Hot air).