The Key to Proper Ventilation in Oversized Baths is Spot Ventilation at the Source. As the Trend to Larger Spa-Like Bathrooms Continues to Gain in Popularity, the Need for Proper Ventilation Becomes More Important. Quick Removal of Moisture at the Source will Keep Your Beautiful Bath Free of Mold and the Effects of Extreme Moisture. Fantech has Developed its Premium Bath Fans So that One Fan Motor Can Effectively Ventilate Several Areas of the Bath. Small 7" Ceiling Grilles (with or without Lights) Can Be Easily Positioned Directly Over Showers, Whirlpool Tubs, Steam Showers, Toilet or Vanity. The Fan Motor is Installed Away from the Living Area for Super Quiet Operation. PB270-2 Premium Bath Fan with Dual Grilles 270 CFM Fan, Two Ceiling Grilles, Two Grille Housings with Dampers and Y-Adapter (44x6). Uses 4" and 6" Duct. Energy Star Qualified. Features and Specification Improved Airtight Design Longer Quick-Connect Duct Collar Hanger Bars Extend to 24" OC (PB190, PB370, PBV6 Hanger Bars Extend to 16" OC.) Set Screw Locks Hanger Bars in Position Key Hole Mounting Slots UL " Wet Location" Rating IC" Insulation Contact" Rating External Rotor Motor by ebm-papst Superior CFM at Higher Static Pressure 100% Speed Controllable Rated for Continuous Duty CFM at 0.2 Static Pressure: 270, CFM at 0.4 Static Pressure: 198 Duct Size: 4" /6" Watts at 0.2 Static Pressure: 72 CFM/Watts at 0.2 Static Pressure: 3.75 Seven Year Warranty Includes: (1) 270 CFM Bath Fan (2) 7" Ceiling Grilles (2) Grille Housings w/Dampers (8) Hanger Bars (1) Y-Adapter (4x4x6) (1) Fan Mounting Bracket Uses 4" and 6" Duct. REPLACES: PB230-2