Ceramic fibers can affect indoor air quality in several ways. They are often used as insulation materials in buildings, and when they deteriorate, they can release fine particles into the air. These particles, if inhaled, can potentially cause respiratory issues or other health problems. However, modern ceramic fibers are engineered to minimize the release of fibers and are often treated to reduce the risk of fiber release. It's important to note that the impact on indoor air quality can vary depending on the type of ceramic fiber, its age, and the conditions in which it's used. Proper installation and maintenance can help to ensure that ceramic fibers do not negatively affect indoor air quality.