Broan Ultra ZB80 30 CFM to 80 CFM <0.3 Sones Energy Star Bathroom Exhaust Fan. 6" Duct, includes 6" - 4" Reducer. Broan NuTone Ultra Series Bathroom Fans - A Revolution in Ventilation Fan Technology We didn’t just change one thing to make installation faster — we changed everything. From our unique telescoping mounting frame that ? ts through retro? t drywall openings without a need for attic access to our easy-to-insert snap-in blower and housing, we’ve designed the ULTRA Series to be the fastest, easiest, most universal installation. Don’t let the uncertainty of what’s behind the drywall stand in your way. Take on any installation knowing that ULTRA Series Ventilation Fans and Fan/Lights will make it easier and faster—up to 60% faster in retro? t installations and up to 20% faster in new construction. Because you don’t make money by wasting time. Just as important, you can con? dently install the ULTRA Series knowing it meets all whole-house mechanical ventilation codes and green building program requirements. All Broan NuTone ULTRA series fans and fan/lights are Energy Star qualified. With ULTRA Green Energy Saving DC Motors, they are actually almost 10 times more efficient than Energy Star requirements.