Product review (5 stars): ... when I went to Walgreens and there were none like it, nor did they stock the filters
I was positive that I would need to replace the whole unit when I went to Walgreens and there were none like it, nor did they stock the filters.  I went on Amazon at my son's suggestion and typed in the model number and they came up.  I immediately placed my order.  It was fast and easy to install and now I am happy again.  Thank you.