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  • UV Technology kills up to 99.9% of certain bacteria, mold, fungus and virus in the water.
  • Easy to use electronic controls.
  • Adjustable Humidistat.
  • Antimicrobial Treated Filter.
  • 3 speed settings to adjust moisture output and sound level
  • 30% quieter than other evaporative humidifiers.
  • Filter helps capture dust, dirt and pollen.
  • Translucent water tank with large opening makes filling and cleaning easy.
  • Quiet Operation
  • Wicking filter removes impurities from water reducing white dust and providing clean moisture output.
Honeywell's Germ Free Cool Moisture UV Tower 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. 30% quieter than rivaling humidifiers, this model comes installed with a filter that will aid in the capturing of dust, dirt and pollen. The addition of easy to set electronics eliminates any and all hassles associated with the accessibility of your humidifier. Incredibly versatile by design, this Honeywell Tower Humidifier comes with 3 speed settings that will allow owners to adjust moisture output and sound levels. The inclusion of a translucent water tank simplifies the filling and cleaning process. The Honeywell Germ Free Cool Moisture UV Tower Humidifier is an ideal fit for larger sized rooms and is capable of running up to 24 uninterrupted hours per filling.
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.
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?
If you have been using your humidifier regularly for over 30 days, follow the cleaning instructions.
Product Details
Product Specs
Product Manuals
Honeywell Germ Free Cool Moisture UV Tower Humidifier, HCM-315T Video

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HCM-315T customer reviews

Overall Rating

43 Reviews
44 customers recommend this product
Honeywell Germ Free Cool Moisture UV Tower Humidifier, HCM-315T Reviews
December 6, 2020
Love it

I am very pleased with my uv humidifier

Rita Laurance
December 1, 2018
Verified Purchase
very good purchase

I recently bought two honeywell humidifiers, one for the bedroom and one for the larger living area. I placed the tower humidifier in the larger room. It keeps the area fresh and humidified. As I live in Michigan and it is very dry in the winter, this was a very good purchase.

November 28, 2018
Verified Purchase

I needed a humidifier for my great room to restore humidity due to the fireplace use, and this item works well.

November 28, 2018
Verified Purchase

Does not shut off automatically once it reaches target humidity. Other than that ok

Grant Ward
October 29, 2018
Verified Purchase
Exactly what was orderes

This humidifier is our 4th one for our house. We keep adding a new one to each bedroom. Couldn't be happier. A must buy

Jill Lockhart
October 23, 2018
Verified Purchase
Best Humidifier!

This is a quality product! We've bought a few other humidifier brands before just to be disappointed. I love how quiet this is and the automatic shut off is super convenient. I would definitely recommend this to everyone!

Sally Ramert
October 15, 2018
Verified Purchase
Home owner

This was a second Honeywell 315T humidifier I ordered this year. The prior one just stopped. I have barely had this current one two weeks and I hope it lasts a while or I will be extremely disappointed in its quality and performance. I have followed directions explicitly in installation, in maintenance and in use of specified filters in both humidifiers so there is no confusion as to how I use it or maintain it. I sincerely hope the first one was flawed but I will be upset if the second one is also not operative.

Brian Kuhnau
August 21, 2018
Verified Purchase
Happy with this humidifier

Excellent product that is easy to use and has a lot of great features, like germ free. Much needed for the winters here and looking forward to years of use.

William McKim
August 17, 2018
Verified Purchase

affordable with quality

February 17, 2018
Verified Purchase
Winter dryness Goodbye!

I love this humidifier! Being able to customize the fan speed and the mist amount is wonderful. Slim line style makes it able to fit anywhere. Rated for large areas.

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