Honeywell HCM-350 Review In 2022: Affordable And UV Ready!

A device that neither resemblances an air purifier or a humidifier. Honeywell HCM350B or HCM350W is a one of the kind, germ-free cool mist humidifier. Unlike other air purifier humidifier that heavily relies on a conventional filter, HCM350 setup is very simple. It uses ultraviolet light, a wicking filter, and a water tank. So how does this mini UV humidifier fares compared with a HEPA air purifier? Can it reduce static electricity, relieve nasal congestion and cough? Find out in our full review below.
online price (US)**
±99.95 $$/ 7

(annual filter cost ±22-44)

** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

Honeywell HCM 350 Specification

ProductHoneywell HCM 350
11.9 x 17.5 x 9.4 in
(30.2 x 44.5 x 23.9 cm)
Weight8.4 lb (3.8 kg)
Coverage (up to)
Airflow speed
Dust free (CADR)
Pollen free (CADR)
Smoke free (CADR)
Humidifying(H) speed
- Lifespan
- Replacement cost ($)
HEPA filter
- Lifespan
- Replacement cost ($)
Carbon filter
- Lifespan
- Replacement cost ($)
Ionizer/ Technologies
UV-light/ PCO
UV technology
3,000 hours
Other filter
Wicking Filter
30-60 days+- 10.99
All-in-one filter
- Lifespan
- Replacement cost ($)
Optional/ Addon
Honeywell Replacement Wicking Filter A (1 pack)
+- 10.99
Protec Antimicrobial Cleaning Cartridge (2 Pack)
+- 9.95
Humidifying Capacity
Water tank8 pints (1 gallon)
Noise level
Power usage level60 W
Timer/ Scheduler
Auto mode
Air qualityAQ indicator
Filter change indicator
More color options
Wi-Fi/ BTBluetooth
Remote control
Child lock
Warranty3 years
Email/ Phone support

Key Features

  • 3-stage filtration UV Cool mist humidifier
  • UV technology - kills 99.9% of bacteria
  • Wicking filter - with blue pre-filter and patented antimicrobial
  • 3 fan speeds (LOW, MED, MAX)
  • 3 years warranty

Design And Usability

Honeywell HCM 350 dimension
11.9 x 17.5 x 9.4 in
(30.2 x 44.5 x 23.9 cm)
Honeywell HCM 350 weight
8.4 lb (3.8 kg)

The most stylish, self-regulating, evaporative technology in the market. Honeywell HCM350 is a versatile UV humidifier that comes in either a black or white version. At a dimension of 15 x 23.6 x 8.2 in and 15.4 lb weight, it is not the most compact but certainly not bulky either. With barely any sharp corners, the ventless body defines well to the modern and stylish aesthetic. At the side, you have a transparent 1-gallon water tank with a wide opening for easy refilling. Carrying the water tank is also easy thanks to the large recessed tank handle. Overall, build quality is up there especially with our all-time favorite break resistant water tank.

Honeywell HCM350 Control Panel

Moving on to the top controls and moisture output area. Operating Honeywell HCM350B could not be any easier. The entire operation is predominant by a single dial knob that allows fan speeds adjustment. Turn the knob to the right to start the operation at low speed or higher. Turning it at the reverse order will reduce the fan speed or deactivate the machine. There is also a tiny reset button that can be press after you have changed the UV light.

Airflow, Coverage, And CADR

Honeywell HCM 350 fanspeed

Given its compressed setup, it's no surprise that the airflow delivery rate and humidifying range is not that great. Honeywell HCM350B air purifier and humidifier limited coverage means it is only suitable for small room size. For optimum results, it is best to place it on top of the bedside table, top cabinet, or working desk. Honeywell HCM350 1 gallon water tank can run up to 24 hours per filling. While the output might not seem a lot, there are still 3 selectable fan speeds for you to tinker around with. Low speed is ideal for nighttime use, medium speed for everyday operation, and High speed or fast humidifying. Again, there is no autonomous mode so everything has to be done manually via the dial knob.

BrandPurifying CoverageFan Speed
Sharp KC-860U341 sq. ft.3
Oreck WK15500B Air Refresh115 sq. ft.4
BONECO W300 Air Washer Humidifier540 sq. ft.3
OPOLAR Evaporative EV01540 sq. ft.1
Venta LW25 Airwasher Humidifier485 sq. ft.3

Filters And Performance

Besides helping you breathe and sleep better, here's the main reason why you should buy Honeywell HCM350B or HCM350W. It comes will the patented germ-killing setup that eliminates up to 99.9% of water-bred mold, bacteria, and spores. First, water in the reservoir will be sanitized by the ultraviolet light that kills virtually every microorganism in the water. With germs, fungus, and viruses out of the way, the wicking filter will start absorbing the germ-free water. Finally, incoming dry air will take in the moisture through the filter and emitted out as fine visible mist. The whole process will repeat itself until every last drop of the water is out.

Noise And Energy Usage

The cool-mist name tag will give you the best assurance on Honeywell HCM350B silent operation. Adding UV-light sanitizing also produces zero noise output, this is the perfect air purifier humidifier to place it in your baby room. Power consumption is slightly high at 60 watts. This is partly due to the Ultraviolet light that requires more power than a non-UV model.
Noise TypeDecibels
Breathing10 dB
Rustling leaves20 dB
Whispering/ Quiet library30 dB
Light rainfall40-50 dB
Conversation50-60 dB
Vacuum cleaner/ Hair dryer/ Washing machine65-80 dB
City traffic80-90 dB

Pricing And Maintainence Cost

Honeywell HCM 350 MRSP/ RSP
+- 99.95
Honeywell HCM 350 annual filter replacement cost
Annual Filter Cost
+- 22 - 44
^ Replacement filters/ estimated cost
You would think an ultraviolet device would cost you at least more than 100. Honeywell HCM-350 UV dehumidifier once again surprise everyone with its super affordable price tag. You could easily get one online between 60-80 dollars. As for the maintenance, replacing the UV light bulb is no issue at all with its 3,000 hours lifespan. However, the wicking filter can be costly to replace as you will need to fork out 11 dollars every 30-60 days. We recommend replacing it sooner rather than later to avoid mold and bacteria growth on the machine.
Honeywell is a major brand thus you can easily purchase it at any channel. Out of the many sites we compared, Amazon has the best deal for Honeywell HCM-350, especially during the festive season. Alternatively, you can purchase from Honeywell official website as the price does not sway too far from Amazon. Lastly, visit your local retailer like Home Depot, Best Buy, Walmart if you want to physically examine the product.

Honeywell HCM 350 VS The Challengers

Venta LW25 Airwasher 2-in-1 Humidifier And Air Purifier Review

Venta LW25 Airwasher Humidifier

About the same price, same cool-mist setup, and utilize a wicking filter. Humidifying performance is about the same but you are trading ionizer with UV light. Is it worth it? Only you can decide.
OPOLAR EV01 Evaporative Humidifier

OPOLAR Evaporative EV01 Humidifier

Not exactly the same comparison as LW25 is much stronger in humidifying and bulkier but at a higher cost. Choose is if you are willing to forego the wonder ultraviolet light.


  • Cost less than 100 for a highly reliable UV air purifier humidifier.
  • Germ killing UV light technology with a long-lasting 3,000 hours lifespan.
  • Wicking filter that comes with two components: blue pre-filter for larger particles capturing and antimicrobial that inhibits bacteria and mold growth.
  • Modern and sleek design without sacrificing the water tank size.
  • 3 years limited warranty.


  • Wicking filters requires replacing every 30-60 days which can be quite costly in the long run.
  • No HEPA filter, carbon filter, autonomous purifying or any cleaning mode.
  • Basic humidity function with no auto on/ off.
  • There is no option to set the desired humidity level. Humidifying will keep on running until it is turned off.
Honeywell HCM-350 Review

Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.
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