Distribution box for a heating and/or air conditioning apparatus, especially for an automotive vehicle

A distribution box for a heating and/or air conditioning apparatus, particularly for an automotive vehicle, wherein the distribution box comprises at least one fresh air inlet duct defining an inlet section, a plurality of air outlet ducts, means associated with said inlet and outlet ducts for regulating the distribution and temperature of air delivered through the outlet ducts, a feed duct of bent configuration for supplying fresh air, said feed duct defining an outlet section and further defining a direction of flow for said fresh air that is substantially tangential with respect to a direction of flow of the air in the said at least one inlet duct, the inlet section of the or each inlet duct being connected with the outlet section of the feed duct, the distribution box further comprising a distribution grid extending across said inlet section of the said inlet duct or ducts, the distribution grid comprising a plurality of spaced vanes positioned in said grid with respect to each other to divide the air flowing therethrough into a plurality of air streams that are controllably different from each other.