Product review (4 stars): Have Bought Many
I am on maybe my 6th piece from Amazon.  Came in Aprilair box.  Clearly Aprilair product.  Good savings from Amazon versus local bog box store.  I can feel in my throat when it is getting old.  I replace it more often that I thought i would, but a new one bumps my humidity gauge up about 5-10% with a new pad.  The old ones look fine, but apparently do not put near as much humidity!