Details come from the older review, the maker’s claims and the Amazon listing, checked on October 11, 2026. Coverage and germ numbers are maker claims, not our lab tests.
The Honeywell HCM-350 is a long-running, easy-to-use cool mist humidifier. It uses a wick and a fan, and a UV light in the tank. Here is a plain look at how it works, how loud it is and what it costs to keep up.
Table of Contents
What You Get
Price on Amazon: $76.42 | 4.3 stars from 10,583 ratings (checked October 11, 2026)
Design and Size
The HCM-350 is a stylish tabletop evaporative unit. The older review measured it at 12 inches high, 18 inches wide and 10 inches deep, and about 9.9 pounds. The tank has a smooth bottom and a comfortable handle, and the lid comes off easily, so filling is simple. It fits a table or a nightstand.
Looking ahead, evaporative humidifiers like the HCM-350 are holding their ground against ultrasonic units because they self-limit and leave no white dust. The newer wave adds humidity sensors and easier-clean tanks. The catch is the wick: it needs replacing, and a wet wick that is ignored is a place for germs and mold to grow.
Features and Performance
- Evaporative technology. A fan blows air through a wet wick. The mist output adjusts to the air, so it does not overshoot.
- 3 speeds. Pick quiet and low or stronger and higher.
- UV light. The maker says the UV treats the tank water and kills up to 99.9 percent of bacteria in it.
- Dishwasher-safe tank. Makes cleaning easy.
- Coverage and output. The maker says up to 360 square feet and about 2 gallons of mist a day. The tank is about 1 gallon, so on high it runs about 12 to 14 hours and on low up to 24 hours.
The older review noted no auto shutoff and no refill indicator, so check the current listing and watch the tank level.
The risk to watch is upkeep. A UV light helps with the water in the tank, but it does not clean a crusty wick or a dirty base. Expect more listings with germ-killing claims. Treat them as a bonus, rinse the tank every week, change the wick on schedule and keep humidity at 30 to 50 percent.
Noise Level
On low the unit is whisper quiet. On medium it makes a gentle white noise. On high it sounds like a fan. That suits people who like background noise while they rest.
Maintenance
Refill daily if you run it daily. Rinse the tank every week, and every 3 to 4 weeks soak the wick in a vinegar and water mix because it can get crusty. Replace the wick as the maker says. Use clean water to slow scale. For more on water, read why a humidifier leaves white dust. Check humidity with one of the indoor hygrometers.
HCM-350 vs Other Humidifiers
The Crane Drop has similar room size and costs less to run, see our Crane Drop review. The Vicks Filter-Free has no wick to replace. If you are not sure which type to buy, read the cool mist humidifier buying guide and how to choose the right size humidifier.
Prices and Alternatives on Amazon
Prices and ratings were checked on Amazon on October 11, 2026.
Price on Amazon: $76.42 | 4.3 stars from 10,583 ratings (checked October 11, 2026)
The Honeywell HCM-350 is the unit reviewed on this page.
Price on Amazon: $61.42 | 4.5 stars from 18,245 ratings (checked October 11, 2026)
The Vicks Filter-Free unit has a 4.5 rating from over 18,000 ratings and needs no wick.
Price on Amazon: $54.68 | 4.3 stars from 16,622 ratings (checked October 11, 2026)
The Crane Drop has a 4.3 rating from over 16,000 ratings. See our Crane Drop review.
Price on Amazon: $39.99 | 4.2 stars from 2,739 ratings (checked October 11, 2026)
The Pure Enrichment MistAire has a 4.2 rating from about 2,700 ratings.
Price on Amazon: $149.99 | 4.3 stars from 6,739 ratings (checked October 11, 2026)
The AIRCARE MA1201 is a console-style evaporative unit with a 4.3 rating from about 6,700 ratings.
Pros and Cons
Pros: easy to fill with a handle; quiet on low; evaporative so it self-limits; dishwasher-safe tank; runs up to 24 hours on low.
Cons: needs a wick replaced; the older review noted no auto shutoff or refill indicator; louder on high; bulkier than ultrasonic units.
FAQ
Does the Honeywell HCM-350 need a filter?
Yes. It uses a replaceable wick filter, because it is an evaporative unit.
Does the UV light really kill germs?
The maker says it treats the tank water. It does not replace cleaning.
How big a room does it cover?
The maker says up to 360 square feet, which suits one medium room.
Final Word
The HCM-350 is a good fit for one medium room if you do not mind the wick. If you want no filter, look at the Vicks Filter-Free.
What happens next: expect quieter fans and better filters in this class, and more buyers comparing yearly wick cost against filter-free ultrasonic units. The HCM-350 stays a solid, simple pick for one medium room.
Related Guides
Keep going with cool mist humidifier buying guide, why a humidifier leaves white dust, how to choose the right size humidifier, Crane Drop review and indoor hygrometers.
