Availability: In Stock
Price: $84.95 $99.95
You Save: $15.00 (15% Off)
Color: Black
  • Cool, invisible moisture helps provide relief from dry air discomfort
  • Wide water tank opening for easy fill and clean
  • 3 speed settings to adjust moisture output and sound level
  • Wicking filter captures minerals from the water, helping to prevent white dust
  • Use Genuine Honeywell replacement filters for best results.
  • Uses HAC-504 series replacement Filter A

Cool Moisture Humidifier 

This Honeywell Cool Moisture Humidifier is an excellent source for introducing a steady stream of comforting humidity that can help throat and nasal passages stay hydrated. Designed with a wide tank opening, this cool moisture humidifier can easily be refilled and cleaned. The removable tank is dishwasher safe and break resistant for increased peace of mind. The availability of three speed settings allows for more control in finding the perfect moisture output and sound level for your setting. The Honeywell Cool Moisture Humidifier is an excellent choice for medium sized rooms and is capable of running up to 24 uninterrupted hours per filling.

Genuine Honeywell Wicking Filter A

This cool moisture humidifier works with Honeywell Replacement Filter A. Designed for optimal moisture output and inhibiting up to 99.99% of mold growth on the filter, this Genuine Honeywell Humidifier Wicking Filter captures minerals from the water and helps prevent the buildup of white dust. The updated version of the Honeywell Replacement Filter A features a blue pre-filter layer that helps capture large airborne particles from the air that passes through the filter.

Protec Antimicrobial Cleaning Cartridge

The Honeywell Cool Moisture Humidifier can also use Protec Humidifier Cleaning Balls. Protec Antimicrobial Cleaning Cartridges feature a patented antimicrobial, Aquastat that continuously works to hinder the growth of bacteria and mold. They're also capable of preventing the buildup of slime in the water and humidifier surfaces. Protec Antimicrobial Cleaning Cartridges work in all humidifiers and are safe/non-toxic. Aquastat contains no harsh chemicals or harsh acids making the cleaning action just as gentle as water on your humidifier surfaces and components.

I hear the fan turning, but I don't see any mist. Is my humidifier operating properly?
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.
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.
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.
My filter has turned light brown and rust colored. Do I need a new filter?
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.
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?
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.
Product Details
Product Specs

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HCM-350B customer reviews

Overall Rating

62 Reviews
61 customers recommend this product
Honeywell Cool Moisture Humidifier - Black, HCM-350B Reviews
Frank A
November 14, 2022
Verified Purchase

It works very good.

Henri F
June 7, 2022
Verified Purchase

I have not opened it and used it yet as it is summer. Hoping this was worth the very long wait and all the reviews are true

Ryan L
May 26, 2022
Verified Purchase
The best humidifier.

Glad to finally have this top tier humidifier in the house. Big step up from the one we had to settle for when these were out of stock.

grace shaffner
November 13, 2020
Verified Purchase
At last my skin has stopped itching!

Both my husband and I were suffering from very dry skin. The weather was getting colder and we were stuck in our dry house. The humidifier has worked wonders and in a very short time.

Stephen Wilson
November 6, 2020
Verified Purchase

The product performs as expected, Well Satisfied.

Cade Lowry
September 16, 2020
Verified Purchase

I am a huge fan of this humidifier. It is one of the best on the market! No Doubt!

Lawrence Graham
July 24, 2020
Verified Purchase

have not had the occaission to use yet

Harriette Einolf
June 1, 2020
Verified Purchase
A Wonderful Product!

The humidifier was easy to set up and very easy to refill. All three settings, even the most powerful one, did not disturb my sleep. I have noticed the improvement that sleeping with the humidifier makes: no itchy, dry eyes, less dry skin and even an improvement in my nose getting more humidity - more physical comfort over all.

Diana Yruegas
May 27, 2020
Verified Purchase

I really appreciate how easy the setup is. This is my first humidifier and even though Id researched before purchasing, you never quite know until you open the box. One thing I wish Id realized beforehand was the spacing needed for the setup. I live in a small apartment and it wasnt easy to find a spot that would allow me to have the machine a foot away from the wall and 4 feet away from the bed, and up not on the floor to make sure theres good air circulation. And also the need for a tray underneath the unit. I realized once I opened the box, and read the manual I saw that the large print, they take no responsibility for water damage on furniture. That's fine and reasonable - I just wish I'd known that ahead of time because finding an suitable tray to fit underneath the unit wasn't an easy task - especially with having to online shop. I'm not sure if Honeywell has ever considered it, but offering a black tray with a 1 lip all around, would be a great thing. I would have added that to my purchase vs having to hunt one down before setting up its taken me a month to find one.

Sherry Chiou
April 20, 2020
Verified Purchase


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