Review on High-performance Ceiling Heater Motor - NuTone S57769000 by Tyler Cooley

We have not installed this motor yet. We have three plumbers servicing a heater that requires this motor for their fans. They seem to last about three years, then their bearings fail and I suspect they become a fire hazard because the heating element keeps running without a fan. We like the downstream feature to accept regular replacements, but they're annoying.