Honeywell's UV Cool Moisture Germ Free Humidifier is incredibly efficient in establishing a clean breathing environment. Self Regulating Evaporative Technology has made this unit capable of eliminating up to 99% of bacteria, mold and various other harmful allergens in the water. 25% quieter than rivaling humidifiers, this model releases cool, filtered invisible moisture into the air. Incredibly versatile by design, this Honeywell UV Cool Moisture Germ Free Humidifier comes with 3 speed settings that will allow owners to adjust moisture output and sound levels. The inclusion of a Break Resistant water tank simplifies the filling and cleaning process. The Honeywell UV Moisture Germ Free Humidifier is an ideal fit for medium sized rooms and is capable of running up to 24 uninterrupted hours per filling.
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Average Customer Rating Based on 25 reviews: 
Very effective - 10/15/2018
Reviewer: Paul Williams
This is our second time using this model. Use in larger room. We live in Colorado where humidity is typically around 30%. Very effective in eliminating static shocks and dry nose. Barely hear the unit. We definitely recommend.
Nice, compact humidifier - 04/11/2018
Reviewer: Charlene Fluder
So far have only had it about a week now this humidifier does just what I need it to do---increase humidity in my hallway where my classical guitars hang on the wall and kitchen. It's easy to use and will be easy to clean, given the simplicity of its design.
Works for me! - 04/11/2018
Reviewer: Joan McDougall
Had a problem with my ultrasonic humidifiers: new cat was knocking them over. So decided to try an evaporative humidifier and this one looked good on paper.
It's quiet, even on the high setting, and I no longer have headaches from dry air--which is the main reason Ive had humidifiers since the 70s. It looks good and while the cat occasionally moves it, most of the time he leaves it alone. The only problem is the tank is on the small size and I have to frequently refill it. May eventually get a larger one, but will most likely get Honeywell again.
Best Humidifier - 02/28/2018
Reviewer: Jayna Denton
I've been using Honeywell products for a long time and I've never had any problems with their products. This humidifier has the easiest mess free water reservoir to fill & cleaning & changing the filter is a breeze. it's so quiet and works so efficiently...
Easy to clean! - 02/26/2018
Reviewer: Patricia Wallen
Love these humidifiers. They are so easy to clean and they work really well. Our humidity hasn't dropped below 60%.
Sleek design - 02/26/2018
Reviewer: Andrea Murphy
Can't wait to try this product
Solid and effective - 01/21/2018
Reviewer: James Clark
It humidifies our 288 sq. ft. bedroom well. Highest fan setting is noisy, med. is white noise, low is almost silent. We use it on med. Nothing to say on reliability as we have had it only a week.
real good very happy - 01/10/2018
Reviewer: john maccarone
great product
HCM-350B - 12/21/2017
Reviewer: Stephen Sager
I bought this Humidifier because I was having problems with my eyes going dry at home. Eye drops were not enough. It made a difference the first night I used it. The machine is very quiet to me on high for when I put it on low I cannot even hear it. It works very well for me.
Humidifier - 12/21/2017
Reviewer: KRISTIN WOLFRAM
The Honeywell 350B humidifier is very effective at improving humidity levels in your home during the dry winter months. Mine has made a big difference in the comfort of my home.
Very quiet! - 12/11/2017
Reviewer: Candace Gregoire
I bought this for my bedroom and it works very well, keeping the humidity level between 40-50%. The tank is very easy to fill and has a large opening for cleaning. I run it on low at night and can hardly tell it's on, it's so quiet. I run it on high during the day and will use most of a tank of water. I've only had it for a couple of weeks now, but so far, I am very happy with this unit.
- 10/06/2017
Reviewer: stebin
Good.
- 07/03/2017
Reviewer: Tim Sovold
Quiet humidifier and easy to fill water reservoir but only 1.5 gallon so need to fill 2X per day. Seems to work well for large bedroom.
Great for large Areas - 03/31/2017
Reviewer: Elizabeth Cabrera
I have this on the lower level of my town home. I keep a humidistat to monitor how well it keeps the humidity up and within range. This does a great job!!! Took me a while to adjust to the exact range I wanted, but a quick learning curve
Great Product - 03/23/2017
Reviewer: daniel ruscillo
Great product works like a charm!
- 03/21/2017
Reviewer: Mark Germann
Works great. Nice low sound, drowns out street noise but not loud at all. Moisturizers air perfectly. Thanks!
After 2 weeks use - 02/22/2017
Reviewer: Frederick Balling
I bought this for our bedroom, and I could tell the difference immediately after we started using it. Its not as quiet as Id like, but the noise level is certainly tolerable. Its too early to tell if there will be maintenance problems.
- 02/14/2017
Reviewer: Elizabeth Cabrera
I have bought several humidifiers in the past. This is the first one that I found fit all my requirements. 1 Effective 2 Very Quiet 4 Easy to fill 3 And VERY easy to clean. This really does make a difference for me - for breathing and my eyes.
- 02/11/2017
Reviewer: Cecily Frazier
The Honeywell Humidifier HCM-350B is very quiet. On the lowest setting you cannot even hear it, although we needed to use the second setting to get the humidity up to 45% in our small bedroom. The water lasts 2 nights sometimes more before needing to be refilled which is a nice feature. It is easy to fill and carry the water holder, however it is too big to use the smaller bathroom sink to refill it, which means a trip to the kitchen. Overall, it is just what we were looking for and were very happy with it so far about 2 weeks of use.
- 12/14/2016
Reviewer: Chris
Very good humidifier. Very silent and doesn't wet the floor like my previous humidifiers.
Excellent Ptroduct - 12/12/2016
Reviewer: Karen Ingram
I have used Honeywell products over the years and this one is terrific. It provides moisture in a very dry bedroom.
- 11/15/2016
Reviewer: mark Scott
Very good item
- 07/04/2016
Reviewer: Sylvia Siegel
I love this humidifier. Have the same item in white. Am so pleased with it.
LOVE THIS!! - 06/01/2016
Reviewer: Brooke Furniss
I have purchased multiple humidifiers, and this one is #1 in my book! It is quiet, doesn't leave a film, does it's job, sanitizes as it works, pretty much it is everything you want in a humidifier and then some. I bought another one after buying this one. HIGHLY recommend!
Looks sleek and works well - 05/06/2016
Reviewer: Whitnee Jackson
This is one of the few humidifiers I was able to find in black, and also one of the most highly reviewed. I am very satisfied with the moisture it provides. On the highest setting it is somewhat loud, but the sound is not annoying. It is even effective as white noise for sleeping, in fact. I am able to run it on high for two nights with one fill of the tank. I am very happy with this purchase.
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Q: I hear the fan turning, but I don't see any mist. Is my humidifier operating properly?
A: Dry air is pulled through the system and a fan disperses invisible, moisture balanced air. There is no "mist" emitted. When operating normally you will feel only cool air coming from the unit. Monitor the water level in your Tank/Base. If you notice a decrease in the Water Tank over 24 hours then the unit is operating normally.
Q: My unit has been running for several hours. I hear the fan spinning, but I do not notice the water level in the tank decreasing.
A: First, check the filter to ensure it is wet. If the pad appears dry, remove it from the Base and gently
rinse under cool water. Reposition wet filter in the Base. You may also want to note the current
moisture level in your home. If the humidity level is over 60% the unit will not put out much moisture
as your air is already saturated. Also verify the upper enclosure and water tank are properly seated.
Q: My filter has turned light brown and rust colored. Do I need a new filter?
A: Probably not. Since your filter has been made with Protec antimicrobial, the change in color
indicates only a mineral deposit. Soak filter in a sink full of cool water to help break up deposits. The discoloration may remain but will not affect the humidifier's performance.
Q: My humidifier doesn't appear to be as clean as when I first purchased and/or I'm smelling an unpleasant odor. What should I do?
A: You probably need to replace your Protec Antimicrobial Cartridge. This cartridge helps your
humidifier stay cleaner, longer and helps freshen the mist. If you have been using your humidifier
regularly for over 30 days replace the Protec cartridge and follow the cleaning instructions.
