The floor storage box is a great feature especially if as Dean pointed out, you don't have a glove box.
I think an inline fan is required to keep air flow and pressure up to the outlet in the footbox. I only ran a vent to the drivers side because it was 1/2 the work and I don't expect to have to many passengers.
You can see the fan under the guard below and the orange duct running from the guard to the firewall.
Regards.