Panasonic WhisperWarm Bathroom Fan with Heater and Lights FV-11VHL2110 CFM; 31 Watt Fan+ Lamp Watts 2 x 18 watts + Night Light Lamp Watts 4 + 1400 Watt Heater+ 3.6 CFM/Watts: .7 sones Duct Diameter (inches): 4" Mounting Opening : 17-3/8" x 12-5/8"Grille Size (inches sq.): 18-1/8" L x 14-1/8" W FV-11VHL2 includes: Two 18-Watt Panasonic flicker free compact fluorescent lamps.Equivalent to 100-Watt incandescent lighting / Electronic ballast / 3500 Kelvin / 1200 Lumens each / 10,000 hours rated life 4-Watt night-light California Title 24 Compliant Welcome to the next generation of WhisperWarm ventilation fans. Panasonic has found ways to improve upon this impressive fan/heat configuration. Now they're easier to install, are more lightweight and have a smaller housing. What's more, they're quieter than their predecessors with reduced sone levels. And lastly, we've streamlined them with a more cosmetically pleasing look. We think you'll be pleased with the new WhisperWarm line -- an already great product that just got better. -- Extremely quiet operation-- Maximum heat level reached in just one minute from "off" position-- Newly-designed contemporary grille-- Easy to install with 24" hanger bar on center joist We're proud to feature concentrated heat --our grilles are now structured in such a way that affords the user a stronger blast of air focused in one area for intensified warmth. 3 year warranty Rustproof paint treatment on galvanized housing Built in damper to prevent backdraft Thermal fuse protection on motor and 3-level safety device for heater Minimum 20 Amp dedicated circuit required.For optimum performance, install heater no more than 8 feet from floor to ceiling.SPECIFICATIONS:Air Volume (CFM) 110 @ 0.1" static pressure 89 @ 0.25" static pressure Noise (sones) 0.7 at 0.1" static pressure Power Consumption (Watts) 30.6 at 0.1" static pressure30.5 at 0.25" static pressureEnergy Efficiency (CFM's/Watt) 3.6 at 0.1" static pressure2.9 at 0.25" static pressure Speed (RPM) 812 at 0.1" static pressure956 at 0.25" static pressure Current (Amps) 0.25 at 0.1" static pressure0.25 at 0.25" static pressureCombined Amps 12.5 Heater Directional Louver NoHeating Element Watts - 1400Heater Blower Fan (CFM) - 90Heater Blower Fan (Watts) - 25UL Listed for Tub/ Shower Enclosure - NoWashington State VIAQ Code - YesCalifornia Title 24 Compliant - YesMfg in ISO 9001 Certified Facility - YesGross Weight (lbs.) - 22.7