Abstract: The compact scent delivery system (300) comprises: —a compact scent delivery device (100, 200), —an air flow mixing unit (400) comprising: 5—an inlet (405) for scented air, configured to be connected to an outlet (125) of scented air of the compact scent delivery device, —an outlet (410) for mixed scented air directed at a smelling port (415), —a conduit (420) connecting the inlet for scented air and the outlet for mixed diluted scent air and 0—at least one element of: —an inlet (425) for fresh air, configured to be connected to a fresh air delivery apparatus, said inlet delivering fresh air into the scented air stream between the inlet for scented air and the outlet for mixed scented air and/or 5—an outlet (430) for waste scented air, configured to be connected to an air flow retrieval apparatus and/or a waste air exhaust, said outlet retrieving scented air from the scented air stream between the inlet for scented air and the outlet for mixed scented air to reduce the air flow either for subsequent dilution