Is your old Nutone bathroom fan humming, not spinning, or just dead? Instead of replacing the whole unit, you can often just swap the motor 'B-Unit'. This one is an upgraded version with a pure copper motor (more durable and efficient than older aluminum-plated ones). It's rated for 100 CFM airflow and 3.5 sones of noise. It's designed to fit a wide range of Nutone fans with a 9-inch by 9-inch blade housing, replacing models like 8663RP, 8664RP, 8663, 8664, 6445, and others (check the long list). Installation is usually straightforward—unplug the old motor, swap the blade, and plug in the new one—often taking just 10-15 minutes. Comes with a 3-year warranty. A cheap and easy fix to get your bathroom ventilation working again.
