Many chairs available in the market today have AFRDI approval ratings. These ratings can give you the peace of mind that the chair you purchase not only meets safety standards, but will also last longer. For most commercial needs, an AFRDI Level 6 certified office chair is sufficient. A Level 6 certification means that the chair is capable of withstanding extremely severe conditions of use, such as those found in police stations, military installations, control rooms, and heavy industries.