Ventilation Fan Features: -WhisperCeiling collection. -So quiet you might not know it's on. -Continuous, trouble-free operation for many years. -User-friendly installation. -Energy star qualified for energy savings. -Built-in damper to prevent backdraft. -Ceiling mounted. -Does not create excessive heat. -Thermal fuse protection - Yes. -Washington state viaq code - Yes. -Mfg in ISO 9001 certified facility - Yes. -Super quiet operation - Yes. -Energy star qualified - Yes. -Totally enclosed condenser motor - Yes, for long life - Rated for continuous run. -Easy installation - Yes. -Rust proof paint treatment - Yes, on galvanized housing. -Built-in damper - Yes, to prevent back draft. -Contemporary grill design - Yes. -Galvanized steel for long life - Yes. -Double hanger bar - Yes. -Motor type - Condenser. -Type of motor bearing - Ball. -Blower wheel type - Sirocco. Ventilation Fan Specifications: -Air Volume (CFM) - 150 (123 at 0.25" static pressure). -Noise (sones) - 0.6. -Power consumption (Watts) - 31.4 (30.2 at 0.25" static pressure). -Energy efficiency (CFM's/Watt) - 4.8 (4.1 at 0.25" static pressure). -Speed (RPM) - 673 (873 at 0.25" static pressure). -Current (Amps) - 0.29 (0.27 at 0.25" static pressure). -Power rating (V/Hz) - 120/60. -UL Listed for tub/ shower enclosure - Yes, when used with a GFCI branch circuit wire. -Duct diameter (inches) - 6". Designer Grille Features: -Designer grilles. -Durable ABS and PP resin construction. -Easy and affordable to change. -Foam pad reduces outdoor noise and condensation. -Insulation lining to prevent condensation. -Seven stainless steel installation screws included. -Ornate grille features finely detailed design with robust proportions. Dimensions: -Mounting opening (Square): 10.88". -Grill: 13". -Commercial grille: 1.31" H x 13.38" W x 14.19" D. -Residential grilles: 1.56" H x 15.75" W x 14.88" D. -Ornate grille: 1.56" H x 15.75" W x 14.88" D. -Overall: 13" H x 15.75" W x 14.875" D. NOTE: Ceiling Fans are not universal. Warranty is void if products from two different manufacturers are combined.