A scent-releasing air filter assembly for freshening air includes a shell that defines an interior space. The shell is configured to couple in-line to an air circulation unit. A fibrous material is positioned in and substantially occupies the interior space. A reservoir, which is coupled to the shell and configured to contain a fluid, is in fluid communication with the interior space. The fibrous material is permeated by the fluid that flows from the reservoir. Each of a plurality of holes is positioned in a respective opposing side of the shell. The holes are configured to allow entry of air into the interior space from a first face of the shell and to permit exit of the air from a second face of the shell. The fibrous material is configured to remove solid particulates from the air concurrent with the release of a fragrance from the fluid to the air.
