Patent ID: 8182749

Claim:
An air freshener delivery device for use with a heating, ventilation and air-conditioning system comprising: a housing unit mounted on a structure, a plurality of vent holes in said housing unit, a sub-duct having a first and a second opening, a substance to be delivered, and an airflow inside of said structure, said first opening of said sub-duct located inside of said housing unit and said second opening of said sub-duct located in the path of said airflow, said sub-duct openings being configured such that said airflow causes a decrease in air pressure inside of said sub-duct, said second opening of said sub-duct points in the same direction as the airflow such that the airflow travels past said second opening and not into said second opening, said air pressure decrease causes air, from an atmosphere outside of the structure, to be drawn through said vent holes into said housing unit and to carry said substance out of said housing unit, through said sub-duct and into said airflow, wherein said airflow delivers said substance to a destination.