Dust and Pollen Filter Replacement

Open the glove box. Remove the glove box stop on each side, then let the glove box hang down (see PASSENGER'S DASHBOARD UNDERCOVER REMOVAL/INSTALLATION ).
Pull out the dust and pollen filter assembly (A) from the blower unit.

Fig 1: Dust And Pollen Filter Location
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Remove the filter (A) from the housing (B), and replace the filter.

Fig 2: Identifying Filter & Housing
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Install the filter in the reverse order of removal. Make sure that there is no air leaking out of the blower unit.