1998-05. Air distributor. Upper. A nozzle / vent to direct HVAC air to the vehicle's windshield of to Defrost / defog the windshield. HVAC Air Distribution Ducts located under the dashboard. Assembly - AIR Distributor. grille. Floor. Instrument Panel Air. Outer. Outlet. Windshield Defogger Vent. Windshield Nozzle.