Demineralization Cartridge for Humidifiers - 3 - Pack, Compatible with Dreo Humidifiers 311/311S/524/524S/306/306S/409S/420S/321/312

It's a perfect fit. The mist smells cleaner. I recommend it.

Manuel C. 5/5 Verified April 29, 2026

Filter is as described. Arrived packaged well with clear instructions and fit perfectly. Recommend for purchasers of new humidifier to buy filters immediately as the filter that came with mine was a very simple screen and will not provide same filtration levels leading to the machine having to be cleaned more often. Only downside about these filters is that they are significantly larger and take up volume in the water container resulting in more frequent water fills. Definitely recommend product.

Stephen M. 5/5 Verified February 28, 2026

I love the product. Works great and easy to use. I really don't need the subscription though .

Dennis C. 5/5 Verified April 21, 2026

The new filters were easy to order, came quickly, and very easy to install.

Danielle E. 5/5 Verified March 13, 2026

Works great easy to uninstall and reinstall

Laurie W. 5/5 Verified August 12, 2026

The filters arrived in a few days, The filter was easy to install.

Kristi M. 4/5 Verified July 31, 2026

Filter works good!

Barbara B. 5/5 Verified July 30, 2026

Purchased as usual. Wrong size Waited awhile. Reordered right size but saying zi passed allotted time to send

Karen W. 2/5 Verified July 23, 2026

Everything was as advertised

Tommy L. 5/5 Verified May 26, 2026

So far we’re enjoying the humifier. It works well and shuts off automatically which I like.

Pat W. 5/5 Verified April 23, 2026

So quiet, efficient, and has a nice look. Easy to clean. It's nice to make use of the Bluetooth capabilities too. Great unit.

Rita F. 5/5 Verified May 26, 2026

Arrived as expected and is working great!

Diana Y. 5/5 Verified March 29, 2026

I use your products with the greatest confidence. Dreo is a name I trust.

Raymond R. 5/5 Verified May 18, 2026

Everything works fine!

Sharon W. 5/5 Verified April 24, 2026

This thing really puts out the stream. And quiet.

Donald R. 5/5 Verified May 13, 2026

N/A

Joseph V. 5/5 Verified April 30, 2026

Works well. Good filters

Billy K. 5/5 Verified June 2, 2026

Works well. Good filters

Billy K. 5/5 Verified June 2, 2026

Silent, effective, Loving it.

Henry H. 5/5 Verified March 23, 2026

Your products are dependable and easy to use-bravo!

Connie S. 5/5 Verified March 18, 2026

Fine

James M. 5/5 Verified March 14, 2026

Perfect

Tim L. 5/5 Verified March 23, 2026

Works great, less duat minerals, and air.

Thomas R. 4/5 Verified March 26, 2026

No complaints.

Romaine S. 5/5 Verified February 20, 2026

Alot less white dust!!

Leslie G. 5/5 Verified February 16, 2026

Great product works well

Matt C. 5/5 Verified February 7, 2026

Good

Stu B. 5/5 Verified January 29, 2026

Its better than the basic screen that it comes with. A bit expensive for what it is but still cheaper than buying tons of distilled water.

Jason P. 4/5 Verified January 21, 2026

Its better than the basic screen that it comes with. A bit expensive for what it is but still cheaper than buying tons of distilled water.

Jason P. 4/5 Verified January 21, 2026

demineralization cartridge for humidifier

Jerod S. 1/5 Verified January 18, 2026

great filters!

Chandler G. 5/5 Verified November 6, 2025

When I initially bought the dreo room humidifier it was mentioned that I could use a demineralization cartridge or a clean air one because I have soft water I went with the clean Air filter when I initially got the unit it had like a little lid {see pix} where the cartridges pops in the place it actually works better without these in my own opinion... My water is different I have soft water my room's different probably than most people I do recommend that you get these for safe measure but I don't know why you would want to sell a demineralization cartridge if it blows out white powder according to what others have said in their reviews that it blows white dust everywhere that did not happen to me because I did not pick the demineralization one I couldn't make no sense of it so I called the actual company but I purchased them off Amazon three days of using the filter my machine had orange gunk in it prior to that I could run it for days with no gunk using regular soft tap water & no filter now I don't know if I wasted my money or if I'm best just to put the little cap that it came with back on after I going to give these filters a second chance after a full clean of the unit because if it's a filter mold got to it quick... For me it ran better with jus the little cap that came with it you don't have to clean these cartridges but on the initial install I was told by the company when I registered with them to make sure you rinse them well before you put them in your machine So the ease of cleaning those was pretty easy the fit went very well jus pops in the unit itself is top shelf quality I run mine on level 3 to get the most of the humidity due to my lung issues it makes the temperature of my room a little bit cooler & much easier to breathe with lung conditions the humidity level the smart part of the machine the base unit lets me know by digital readout how the humidity level is fairing make sure to read the directions at the moment I can't tell you how long these filters last but I do remember it was a good amount of time I don't think I will buy these anymore I will come back to update if the orange mold keeps showing up then I may not use these ever again and just use the cap... I was cleaning it ever 3 days as it runs nonstop in my room so I don't know if these are good idea or not many consumers has stated in reviews on the unit that one cartridge of certain flavor/demineralization will put white residue all over the area my experience with these filters is after 3 days I had to tear it down which is no easy task & clean out the gunk so I'm not breathing that orange mold let alone the ick but if you have hard water it speaks & acts different as in said above 3 for $18 is not bad it's the same price thru dreo or dreo store on Amazon

Miss D. 5/5 Verified August 8, 2025

These cartridges almost entirely eliminated the white dust commonly associated with ultrasonic humidifiers. And one cartridge lasted for almost 2 months of nightly bedroom use. Definitely worth the money as they eliminated my frustration with the ubiquitous white dust.

Neal D. 5/5 Verified July 16, 2025

I haven’t used this long enough to provide a review.  So far, I have not had any issues.

Dianne G. 4/5 Verified July 11, 2025

Living in Arizona almost requires you to have a humidifier in the home. However, it’s very tiresome constantly having to use distilled water or filtered water in order to avoid the hard water minerals that are prevalent in Arizona from being dissipated into the air. It’s been about three weeks of running these cartridges in my humidifiers and there is virtually no hard water or calcium in the tank and I’m finding myself having to clean the tank a lot less frequently. I would highly recommend getting these cartridges for your humidifier for ease of use in maintaining the equipment and air quality.

Kendra 5/5 Verified July 6, 2025

It was easy to use and clean. It’s a great product.

Tracy C. 5/5 Verified June 4, 2025

It helps reduce the minerals in the water for the humidifier.

Lloyd A. 5/5 Verified June 2, 2025

Very clean. You can smell the mist that it’s well filtered

Juvie Z. 5/5 Verified June 2, 2025

Great experience!

Greg K. 5/5 Verified May 31, 2025

Quality product that appears to do what it was designed for.

Gfc 5/5 Verified May 18, 2025