Grilles

     The main technical goal for a radiator grille is air flow control through an adequateintake duct,  between the radiator grille and radiators（usually the airconditioningcondenser is coupled with the engine cooling radiator)．When the sealing of the intake ductis missing or poor, due to local leakage air can escape from holes where pressure loss islower than through radiators and air recirculation around radiators is possible，causing anincrease in air temperature instead of cooling.

    Today the air intake for the passenger compartment has adequate dimensions，leadingair flow through the heat exchangers of the conditioning system. Instead originally theywere simple，direct louvers between cabin and environment, usually small，often handoperated and only capable of capturing air flow layer adjacent to the body surface.

    Air outlets have been introduced successively to supply a washing flow through thecabin，in order to eliminate internal humidity which causes the misting of glass. Originallythe preferred position for outlets was on the rear side pillars，completed by louvers andlabyrinth ducts，to avoid water and noise ingress.