Heat in the tunnel pt. 2

Took a long drive today and did some more tests...

1) CCU off / Temp knob on COLD (64) = Feeling all the heat in the tunnel (shift boot/parking brake)

2) CCU off / Temp knob on HOT (90) = Feeling all the heat next to my right foot inside the center console - below/behind the radio head unit

3) CCU on / Temp knob on COLD (64) = Cold air coming out of the vents as it's supposed to and otherwise same as #1

4) CCU on / Temp knob on HOT (90) = Hot air coming out of the vents as it's supposed to and still feeling a teeny tiny bit of heat in the tunnel (shift boot/parking brake)

So the million dollar question is, what's directly in front of and below the radio head unit, to the right of my (heavy) right foot? Any why is it sending hot air all over the place?
 
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