Honeywell HCM350B Germ Free Cool Mist Humidifier Review

This Honeywell HCM350B Germ-Free Cool Mist Humidifier is a medium-size 1-gallon evaporative-type device with UV technology that kills germs in the water.

Key features & benefits

  • 2-in-1 Device.
  • Patented Ultra-Violet light technology to kill up to 99.9% of bacteria, mold, fungus, and viruses.
  • 1 Gallon (3.8 L) water tank.
  • Works with a filter and fan.
  • Not for essential oils.
  • No white dust.
  • 3-Year limited warranty.
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Description

This Honeywell HCM350B Germ-Free Cool Mist Humidifier is a medium-size 1-gallon evaporative-type device with UV technology that kills germs in the water. This means you have 2-in-1 systems here and this puts it in the groups of air humidifiers and air purifiers.

Regarding the water tank size, as mentioned above this is a device for smaller to medium size rooms, and it can run up to 24 hours with one fill.

The picture below shows how this device works. So the water from the tank passes through an area where it is illuminated by the UV light, and this is supposed to kill 99.9% of bacteria and other germs in the water. Note that such UV technology has been around for decades and it is used in medicine and also in the outdoor equipment, there are many UV purifiers for hikers on the market.

Honeywell HCM350B Germ Free Cool Mist Humidifier cross section.
Honeywell HCM350B Germ-Free Cool Mist Humidifier cross-section.

The same UV technology works here. The purified water is then absorbed by a filter and with the help of a fan, the vapor spreads in the air. So yes, you have a filter here and it is necessary to replace it occasionally. But see this from the good side:

  • You can use tap water in this system, so there are no expenses for distilled water.
  • With this system you are safe from what people call white dust. Eventual minerals in the water are absorbed by the wicking filter.
  • Above all, as mentioned above, here you have two devices in one, and the price is simply incredible.

They claim that with such a system you cannot over-humidify because air can contain only a certain level of such cool moisture. Having such a system acting in the room improves breathing comfort, sleeping, nasal congestion, and it also helps with a dry skin. It is also known that extra moisture reduces static electricity which you have probably experienced at home.

Other features include three output levels, basically, this is related to the fan speed levels, and also to the noise level. They also suggest not to use essential oils because the oils can damage the humidifier and void the warranty.

A bit more about UV killing germs in the water

According to their statements, they used tap water and the testing on microbial reduction rate gave the following results after 2 hours of continuous exposure to the ultraviolet light in the humidifier:

  • Bacteria: Escherichia Coli 99.9%.
  • Mold: Aspergillus niger 99.9%.
  • Fungus: Penicillium Citrinum 99.9%.
  • Virus: MS2 99.9%.

These are remarkable results, you can see more in their manual.


Specifications

  • Weight: 9 lb (4.1 kg).
  • Dimensions: 17.5 x 9.4 x 11.8 in (44 x 24 x 30 cm).
  • Water tank: 1 gallon (3.8 L).

Rating, Pros & Cons

In the table below I summarize my rating and what I see as good and less good in this Honeywell HCM350B Germ-Free Cool Mist Humidifier:

Evaporative 2-in-1 Device: Cool Mist Humidifier That Kills Germs
Honeywell HCM350B Germ Free Cool Mist Humidifier

Product Name: Honeywell HCM350B Germ-Free Cool Mist Humidifier

Product Description: This Honeywell HCM350B Germ-Free Cool Mist Humidifier is a medium-size 1-gallon evaporative-type device with UV technology that kills germs in the water.

Brand: Honeywell

SKU: B00FJTVHKO

MPN: HCM350B

4.6
4.6 of 5 stars 1 review
  • Features
  • Design
  • Ease of use

Summary

This is an impressive device, you effectively get two essential tools in one and for a price that is a true bargain. My overall rating is Excellent and with all the good reasons.

Sending
User Review
5 (1 vote)

Pros

  • Two devices in one.
  • Elegant design.
  • Safe for kids, no warm water.
  • Works with tap water.
  • Great price.
  • Two possible colors.

Cons

  • The filter needs replacement.

Please see a bit more in this short video:

So as you realize, this Honeywell HCM350B Germ Free Cool Mist Humidifier Review acts as an air purifier of a particular type, you have two devices in one, and you have seen the price. This is a product with the price/value combination that is hard to match.

Note that there are more items of this type presented here in the site, please check this Venta LW25 Airwasher 2-in-1 Humidifier and Air Purifier and also this BONECO Humidifier Air Washer W300. Both are filterless devices where the water acts as a filter.


Additional information

Model

HCM-350/HCM-350-TGT

Warranty

3 year limited warranty.

Size

18.6 x 13.1 x 10.5 inches high

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