Dreo Demineralization Cartridge 3-Pack for Humidifiers, Compatible with Dreo Humidifiers HM311/311S/524/524S, Prevent Mineral Build-up, Filter Hard Water, Eliminate White Dust

Top notch. Easy to use, clean and install and i like the design because its very long lasting and has no leaks and provides great filtration of humidity.

Definitely minimize calcium dust.

Bought this as recommended by Dreo to give extra life to my humidifier and better filter the hard water. Seems to work well for the money. It helps with the water quality. I can tell a difference with the air quality.

I am beyond impressed with the Dreo Demineralization Cartridge 3-Pack! These cartridges work wonders in preventing mineral build-up and eliminating white dust, making my humidifier run more efficiently and keeping the air in my home fresh and clean. The three-layer filtration system ensures that hard water contaminants are filtered out, resulting in a healthier mist—perfect for those with sensitive sinuses or respiratory concerns.Installation was effortless, and I love that each cartridge lasts up to 150 liters of water, meaning fewer replacements and more convenience. The Dreo app integration is a fantastic bonus, allowing me to monitor the cartridge lifespan with ease. If you're looking to extend the life of your humidifier and improve air quality, this is an absolute game-changer! Highly recommend!

These filters really cut down on the staining and hard water spots in our humidifier. The filter last for sometime and you can keep try on its life through their app, which is useful. They weren't too expensive for the value.

First they took 3 weeks to be delivered. I have hard water so hoped they would help, but if anything the white film on stuff is as bad if not worse than with the little filter that comes with the humidifier. And now only about 1 month max, the thing stopped the humidifier from working - wasn't letting enough water thru I think. That was on the lowest setting almost all the time. I put the little filter back in and it works fine again.

We have two humidifiers, and VERY hard water. These do a great job keeping the minerals from clogging the humidifier. We're happy with them.

So how do you know if this demineralization cartridge works? I suppose if you don’t see a lot of white powder or other unacceptable things in the Dreo tank it’s working.I honestly don’t know if is does anything for me since I use only distilled water. No matter, I don’t want to breathe in anything that shouldn’t be in the tank.I purchased two packages of three each so I’ll replace them when the humidifier signals a change is needed. I figure it’s some protection for your furniture as well as what you breathe, so I’ll continue to use them.