This unit mounts under the van and pushes cool exterior air into the van through a 4" opening. It is VERY quiet and has a volume control. It comes with the floor grille, a remote, the control box, a washable filter and the blower unit.
It draws 5A at 12V on full volume, and requires a 12x12x16" space under the van with a 4" hole into the cab.
Please note: Not recommended to be used in winter with an Diesel or Gas heater exhausting fumes under the vehicle, or while idling, as that would potentially also produce fumes that you are sucking in. It can be used while driving.