A properly sized ENERGY STAR bathroom exhaust fan can control moisture in the air while you shower or bathe, as well as control mold and mildew growth. To avoid moisture problems, control humidity in your bathroom by running your ventilating fan during and 15 minutes after showers and baths. Find out how we can install a system that will keep your ventilation fan removing the moisture and odor for 15 minutes after use. We recommend ENERGY STAR qualified ventilation fans because they use 60% less energy on average than standard models. They are quieter and use high-efficient motors and improved blade design, providing better performance and longer product life. Also be sure the fan duct leads to the outdoors to prevent black mold and moisture problems in your walls or attic.