Product review (2 stars): Noisy at times
Blows good but extremely noisy.  The noise comes and goes.  If I repositioned it, the noise would go away for about an hour then return.  I followed the installation instructions to a tee, ensuring the fan was positioned away from the cooling plate.  It is not from ice buildup as the noise came within an hour of install.  Nice design but poor quality fan motor ruined it for me.  After reading a few other posts, it seem this a common problem.  My old computer fan worked much better.