Ceramic fibers can affect indoor air quality in buildings in several ways. They may release fine particles into the air, which can be inhaled and potentially cause respiratory issues. Additionally, some ceramic fibers are known to be friable and can break down over time, releasing fibers that can become airborne. These fibers, if inhaled, can be harmful to human health, especially over prolonged exposure. Furthermore, the presence of ceramic fibers can also affect the air quality by altering the humidity levels and potentially harboring mold or bacteria if the fibers become damp. It is important to ensure proper ventilation and to use ceramic fibers that meet safety standards to minimize their impact on indoor air quality.