Review on 🔍 LBLVBNEWD Replacement Humidifier Wicking Filters Compatible with Honeywell HAC-504 and HAC-504AW, Filter A - HCM-350, HCM-300T, HCM-600, HCM-710, HCM-315T by Brian Fishel

I bought these for my Honeywell HCM350W Cool Mist Humidifier. They fit perfectly and more importantly, work great. They seem "heavier" than OEM. I'm not an expert on humidifiers, but I think it's good. A trick to increase the service life: I keep two filters in rotation. One is used in the humidifier (as you'd expect) and the other is in the filter room, working and getting ready to use. When a running humidifier gets too dirty, a fitness filter (my closet) goes in it. The replaced filter is then exposed to a bath of diluted vinegar (1/2 cup vinegar, 1.5 gallons water, or whatever completely covers the filter) for several hours. This will remove all (most) of the dirt. Rinse with water, air dry and send to gym/toilet. If after a few weeks the humidity is not what you expect, repeat the replacement. I did this all winter, and two out of the four filters was enough. I haven't touched the other two yet and the other two have slight signs of wear but still work great. I can maintain my desired humidity without compromise.