LoProfile 80 CFM Ceiling/Wall Bathroom Exhaust Fan with 4 in. Oval Duct or 3 in. Round Duct, ENERGY STAREfficiently ventilate your bathroom with the Broan NuTone LoProfile Exhaust Fan. With an airflow of 80 CFM, it effectively removes humidity and odors, while saving energy with its ENERGY STAR certification. Its versatile design allows for easy installation with either 4 inch oval ducts or 3 inch round ducts. Dimension Value Housing Length (in.) 10. 5 Housing Width (in.) 11. 375 Product Height (in.) 5 Product Length (in.) 13 Product Width (in.) 10. 5