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 and Powerful** Experience near-silent operation at just 1.0 Sones quieter than a library. This energy-saving bathroom exhaust fan provides 110 CFM of airflow to efficiently manage air quality, powerful enough for enclosed rooms (including bathroom) up to 107 sq. ft. Duct Diameter is 4 inches. **Integrated Exhaust Fan, Simple to Install** The setup is straightforward enough to be completed by following the steps and illustrations in the manual. If you are replacing an old bathroom fan and using the existing ductwork, the installation can be finished without requiring extra materials.

**Detachable 4 Inch Polymeric Duct** This household exhaust fan for bathroom ceiling comes with a 4 inch detachable polymeric duct connector, which is the most common size for ventilation ducts. In most situations, you can directly utilize the old exhaust pipe. **Multiple Use Scenarios** The 13B-110 bathroom vent fan is suitable for the bathroom, bedroom, cloakroom and other enclosed spaces that require reduction of moisture and odors. Maintaining ventilation and dryness can effectively ensure cleanliness and absence of odors in enclosed spaces. **Housing Size** The recommended opening size for the BPT13B series household ventilation fan is 7.75 W x 7.5 L x 5.7 H inches, a suitable and commonly used household size