Air volume- 90 CFM; Noise level- 1.5 sones Includes multi-function switch, 4 270W anti-blast heat lamps and a 60W incandescent bulb Fan, heater, and light may be wired separately UL/CUL Listed when used with GFCI branch circuit wire; do not install directly over tub/shower enclosure; requires a dedicated 10-amp circuit Indicator lamp for ON/OFF for detection. Grille dimensions- 17 3/4 x 14 9/16 inches. Housing dimensions- 11 11/16 x 11 11/16 x 7 1/4 inches