Product review (1 stars): Noisier than a jumbo jet
Even at the lowest setting, it is so noisy you will not hear yourself think.  It is not because of bad installation because I have a contractor who screw it tightly to 2x6 wall studs to minimize unnecessary vibrations.  I wish I can give this a worse than 1 star rating.  Now I have to do all this work to replace it.  After one week, I can no longer take it.  The noise makes the whole house sound like a factory.  Incredible.