This Ultra Silent Series bathroom fan allows you to ventilate your bath space quietly. The sound level will not go above 1.3 Sones. This exhaust fan attaches to 4" ducting. With easy installation and an ENERGY STAR® rating, this exhaust fan is a goo choice. It is UL listed when connected to a GFCI protected branch circuit. If placed over bath or showers must be installed on a UFCL brand circuit. White color. ENERGY STAR® rated. Motor loudness rated at 1.3 sones. Air movement rated at 110 CFM. UL listed when connected to a GFCI protected branch circuit. 13" wide. 14" long.