For those who say it's louder than OEM, I've experienced the same thing temporarily, not because it's faulty but because the type of case back pressure is on the device generates fans (flap outlet on the house side), a simple depth adjustment on the bracket eliminated this problem. If you are unsure if there is a problem with yours, you can easily check by opening the vent on the other side or placing a paper towel on half of the lid in the bathroom to restrict airflow to avoid the restriction of the case to compensate / increase if this is the case The fan runs during normal hours at all times, this is the most likely problem with the case. The fan is most likely more powerful than the OEM, mine was too old to meet the spec but I noticed a slightly more aggressive fan style that would have the same effect.
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