WhisperRemodel DC exhaust fan for medium to large rooms with Pick-A-Flow Speed Selector - 1 fan with 2 CFM choices. (80 CFM or 110 CFM). Two airflows options of 80 CFM and 110 CFM, great for medium to large rooms of 80-110 Sq Ft Quiet fan with less than 0.3 sones at 80 CFM and 0.8 sones at 110 CFM Limited warranty: 6 year warranty for DC motor, 3 year warranty for all other parts Low profile housing depth 5-5/8 in, fits in joist size 2 in x 6 in or larger 4 in duct collar with 3 in detachable duct adapter (included) plus a slide and snap-in junction box providing installation flexibility - perfect for new and old construction projects Flex-Z Fast installation bracket for flexible, fast and easy installation even from below the ceiling Built in damper to reduce back-drafting UL Listed for over a tub or shower enclosure when GFCI protected ENERGY STAR, HVI-Certified, UL/cUL Listed, California Title 24 compliant and FCC Compliant Collection Name: WhisperRemodel DC Color Temperature (Kelvins): 0 Fixture Color Family: White Fixture Finish: Matte Manufacturer Color/Finish: White Type: Bathroom ventilator fan Ceiling Cutout Length (Inches): 11 Ceiling Cutout Width (Inches): 11 Duct Size: 4-in Fan Box Height (Inches): 10.20 Fan Box Length (Inches): 17.52 Fan Box Width (Inches): 14.09 Grille Length (Inches): 13 Recommended Room Size (Sq. Feet): 100 Suggested Room Size: 100-149 sq ft Width of Grille (Inches): 13 Air Movement (CFM): 110 Attic Access Needed: No Automatic Shut-Off: No Bulb(s) Included: No Decorative: No Duct-Free: No Fan Sound Level (Sones): Quiet (under 1.5 sones) Fan Speeds: 2 Grille Shape: Square Hub Required: No Humidity Sensor: No Integrated Heater: No Light Options: None Lighted: No Lowe's Exclusive: Yes Motion Sensor: No Mount Location: Ceiling Night Light: No Night Light Maximum Bulb Wattage: 0 No Cut Installation: No Number of Lights: 0 Room Light Maximum Bulb Wattage: 0 Roomside Installation: Yes Sound Level Rating (Sones): 0.8 Speaker Included: No Voice Controlled: No Warranty: 6-year limited App Compatibility: No Bluetooth Compatibility: No Bluetooth Enabled: No Smart Compatible: No Smartphone Enabled: No Wi-Fi Compatibility: No Works with Amazon Alexa: No Works with Android: No Works with Apple HomeKit: No Works with iOS: No Works with SmartThings: No Works with the Google Assistant: No CA Residents: Prop 65 Warning(s): No ENERGY STAR Certified: Yes HVI Certified: Yes Safety Listing: UL safety listing Title 24 Compliant: Yes UNSPSC: 40101600