Review on NuTone 87546000 B Unit Assembly Ventilation by Rusty Heredia

August 17, 2017 Revision B: This fan is approximately 80% quieter than the original fan. The main noise is the sound of the wind and the air conditioning (see my notes below for more information). Installation Tips: I found it easier to bend the side with the tabs slightly towards the fan and the tabs slightly down (in opposite directions). Also place the fan shroud closer to the center (the round part on the ceiling). It was difficult to insert a $$ because you are trying to fit a square box into a square box of almost the same size. called "FrequencySee"), tuned to 20-20,000 Hz), 3 main sounds could be heard: - The main noise continent is at a frequency of 120 Hz at 58 dB (ac hum, harmonic 60 Hz) - The next loudest sound is noise wind, approx 55 dB - Then a hiss-like tone appears i.e. at 1200 Hz at 50 dB (higher number = louder tone) (that was about 3 meters from the fan) (my fan blade was painted black)