Broan 784 Energy Star Qualified Fan, 80 CFM 2.0 Sones 65 CFM at 0.25 static pressure Energy Star Qualified 80 cfm 2.0 sones hvi certified and 65 cfm at 0.25-Inch static pressure Energy star and made in the USA 4-Inch ducting Fits in 2-Inch by 6-Inch ceiling construction UL listed for use over bathtubs or showers when connected to a GFCI protected branch circuit