Ceramic fibers can affect indoor air quality and ventilation systems in buildings in several ways. They may release fine particles into the air, which can be inhaled and potentially cause respiratory issues. These fibers can also accumulate in air ducts and filters, reducing the efficiency of ventilation systems by obstructing airflow. Regular maintenance and cleaning of ventilation systems are necessary to minimize the buildup of ceramic fibers and maintain good indoor air quality. Additionally, the use of high-efficiency particulate air (HEPA) filters can help capture these fibers, further improving air quality.