Review on Holmes Humidifier Filter Pack HWF100 UC3 by David Cronin

I've been using these humidifier filters in my son's room for a few weeks and they seem to be of very good quality. I'm not sure how long they're supposed to last until I use them longer, but no mold or discoloration was visible after a few weeks of use. They fit perfectly on the old Bionaire humidifier and were exactly the same size and material as the original filters. While I couldn't find the exact filter type on the humidifier (it's old), I found they were the same filters but with a different part number. Doesn't matter to me, they work perfectly. The ones I received had the blue tabs (picture) in the same position as the originals. The filters fit perfectly in the grooves and absorb water as intended. Buy them if your humidifier uses this type, try to stay away from nameless brands that are cheaper but of lower quality. My only gripe was that they came in a pack of 3 (still a 5 star product, just rant). My humidifier only uses 2 filters so I had a choice of having 1 extra filter or buying 3 more packs and having 4 spare filters. After using the filters for a couple of nights and making sure they worked well, I bought another box to have spares on hand.