Chosen Solution
I purchased 4 of these BAP600 units from Best Buy just over a week ago. When first installed, the fan on each was quiet, especially on setting 1. Now, just a week later, all of them are much louder and the fan sounds much faster on level 1. They are all different sounding. One of them is so loud, that there is barely a difference in fan speed 1 and 2! For fun, I removed the filter and ran each on level 1, and the fan returned to the original quietness, until I put the filter back in. Cleaning the filter as per instructions has not resolved the issue. Any ideas? There are no obstructions in the intake or outlet for air. Thanks.
@pneedler ,Paul , You say when you remove the filters all was good. If you take the filter out of one of the quieter one’s and put it in the noisiest one, if the noise changes to be the same a the quieter one, then it is a filter problem. If the noise does not change then the fan should be returned as defective. Actually you may want to return all of them while you can, if the filters are not going to live up to a satisfactory standard and unacceptable noise level created after a week. You may want to find a model with larger filter/capacity. Good luck. I hope this helped you out, if so let me know by pressing the helpful button.
