Broan Ultra Silent Bath Fan

We installed this fan in our upstairs bathroom. We tested it when we first got it fixed to the ceiling joists and wired. It was very quiet. So nice. But then we attached the vent pipe and piped it out the side of the house. It is only a six foot run, one 45 degree turn and one 90. Suddenly the fan rattled and groaned as if it were 30 years old. We ended up taking out the internal flap and are trusting the wimpy little external vent flaps to stop back drafts in the winter. That helped the noise. But it is still disappointingly fragile sounding with some rattles and speed variations. Two stars.

We replaced a builder installed fan that sounded like a motor boat, and bought this fan as it was advertised as the most quiet and less "sones" than the others. From what I understand 1 sone should be equivalent to about 40 decibels. Well I measured our decibal level and it is 65-70 which is still pretty loud. It is marginally quieter than our previous fan but we are very disappointed in the sound level. I don't see how they can advertise "whisper quiet". We have the fan in the toilet closet with high ceilings.

GREAT! Installed in existing 5'x9'2 bathroom used often, no steam from shower. Cut 3-4" additional gyp. board at exhaust length to retrofit.