EZ INSTALL – Attic access Not required for installation. Designed to fit most standard 9 x 9 inch ceiling openings in small bathrooms. Minor adjustments to your ceiling opening may be necessary if replacing a differently sized fan. TOP-NOTCH AIRFLOW – With an impressive 100 cubic feet per minute (CFM), this fan efficiently removes moisture, odors, and stale air for bathrooms up to 100 square feet. Awarded a perfect 5/5 rating by Consumer Reports. IMPRESSIVELY QUIET – With a noise level of just 0.8 Sones, this fan operates so quietly that owners sometimes forget it's even running. Significantly quieter than the 1.0 Sone benchmark for "very quiet" fans. HANDS-FREE HUMIDITY SENSOR – Automatically activates the fan to maintain your preferred humidity level (30% to 80% relative humidity) without the need for constant monitoring. For extended operation, simply adjust the customizable timer. BUILT-IN LIGHTING - This modern edge-lit LED panel delivers 1040 lumens of brightness with just 12 watts of energy. It’s dimmable for customizable ambiance, and the 4000K color temperature ensures a natural, clean light. DUCTING - Detachable 4 inch polymeric duct with back draft prevention damper. RELIABILITY - Proudly stand behind our products. KAZE APPLIANCE SNP100HL9 Super Quiet 100 CFM , 0.8 sones Ceiling Mounted Ventilation Fan Model No: SNP100HL9. 100 CFM, 0.8 sones super quiet, Humidity Sensing, LED light. Please note the ceiling opening requirement is 9 x 9 inch, resizing your ceiling opening will be needed if existing fan size is different. Suitable for standard bathroom size up to 100 square feet. KAZE Appliance is proud to present SNP100HL9 with Humidity Sensing feature. Redesigned one piece blower assembly with removable 4 inch polymeric duct further improves stability and reliability. Built with high-quality components and permanently lubricated motors to give continuous, trouble-free operation. Humidity Sensing -- Humidity sensing fan uses a sophisticated humidity sensor that responds to: (1) moderate to rapid increase in humidity or (2) humidity above a user-adjustable set-point (30% to 80% relative humidity) Delay Timer -- The SNP100H is also equipped with an adjustable delay timer (5-60 minutes) that provides additional run time for the fan to complete the remaining necessary ventilation after the sensor has stopped sensing a rise in humidity and the humidity level is below the user setting. Air delivery rate: 100 CFM Noise Level: 0.8 Sones Super Quiet Duct Size: 4-inch round polymeric duct with built in back draft metal damper. Grill Dimension: 11 13/16 x 11 7/16 inches polymeric resin grille attaches directly to housing with torsion springs Housing Dimension: 9 x 9 x 5 3/4 inch Voltage / Frequency: 120Volt/60Hz (0.2A Motor Current) Wattage: 26W