JOEAONZ Bathroom Exhaust Fan 110 CFM 1.0 Sones Ultra-Quiet with Metal Housing, Ceiling Mount Ventilation Fan Large Air-flow Capacity, Energy-Saving Household Bath Vent Extractor, White Plastic Grille

1.0 Sones Ultra-Quiet & Powerful Experience whisper-quiet operation at just 1.0 Sones quieter than a library. This energy-efficient bathroom exhaust fan delivers 110 CFM large airflow capacity to effectively control air quality, powerful enough for enclosed rooms (including bathroom) up to 107 sq. ft. Duct Diameter 4 inch. | Integrated Exhaust Fan, Easy to InstallThe bathroom fan installation process is simple enough that you can complete the installation only by the installation steps and pictures above the manual. If you replace the old Bathroom fan with the existing pipeline, the installation process can be completed without the need for additional materials. | Detachable 4 Inch Polymeric DuctOur household exhaust fan for bathroom ceiling equipped with 4 inch detachable polymeric duct connector, which is the most common size of ventilation duct. In most cases, you can directly use the old exhaust pipe. | Multiple Use Scenarios13B-110 bathroom vent fan is applicable to the bathroom, bedroom, cloakroom and other enclosed spaces that need to reduce moisture and smelliness. Maintaining ventilation and dryness can effectively ensure the cleanliness and absence of odors in enclosed spaces. | Housing SizeSuggested opening size of household ventilation fan BPT13B series are 7.75 W x 7.5 L x 5.7 H inch, an appropriate opening size. This is the most commonly used household size.