Ceramic fiber products can significantly affect indoor air temperature and humidity. They possess excellent thermal insulation properties, which help to reduce heat transfer, thereby maintaining a stable indoor temperature. This can lead to energy savings as less heating or cooling is required. Additionally, ceramic fibers can act as moisture barriers, preventing the passage of water vapor, which can help control humidity levels. However, if not properly installed or if the product's permeability is not balanced correctly, it could potentially lead to trapped moisture, which might affect indoor humidity negatively. Proper ventilation and product selection are crucial to ensure that ceramic fiber products contribute positively to indoor comfort.