Head to head · 2026
Levoit Classic 300S Smart Top-Fill Humidifier vs Honeywell HCM350 Germ Free Cool Mist Humidifier
Contender A
The same smart auto-humidity brain as the LV600S in a simpler, cheaper, top-fill cool-mist body — the bedroom pick.
~$80 typical price
Buy on AmazonContender B
Honeywell HCM350 Germ Free Cool Mist Humidifier
Editor's ChoiceThe evaporative alternative: tap water is fine, no white dust, self-regulating output, and a UV chamber — at the cost of a fan you can hear and a filter you replace.
~$76 typical price
Buy on AmazonOur verdict
Ultrasonic versus evaporative. The Levoit is silent, top-fill, and holds a target humidity automatically — but it needs distilled water to avoid white dust. The Honeywell runs on tap water, leaves no dust, and self-limits as the room approaches saturation — but its fan is audible, it has no humidistat, and it eats a wick filter every month or two. Soft water or willing to buy distilled: Levoit. Hard water or dust-averse: Honeywell.
Pick the Levoit if…
- ✓Silence and auto mode in a bedroom
- ✓You'll use distilled water (or have soft water)
- ✓App control and top-fill convenience
Pick the Honeywell if…
- ✓Hard tap water and no interest in distilled
- ✓White dust on furniture is a deal-breaker
- ✓A little fan noise is fine (living room, kid's room)
Spec by spec
| Spec | Levoit Classic 300S Smart Top-Fill Humidifier | Honeywell HCM350 Germ Free Cool Mist Humidifier |
|---|---|---|
| Our score | 8.7 / 10 | 8.5 / 10 |
| Type | Ultrasonic, cool mist, top-fill | Evaporative (wicking filter + fan), cool moisture |
| Tank capacity | 6 L (1.6 gal) | 1.1 gal (~4.2 L) |
| Runtime | Up to ~60 hours on low | Up to ~24 hours on low |
| Room coverage | Up to ~500 sq ft (manufacturer) | Medium rooms (~500 sq ft) |
| Humidistat | Yes — sensor with auto mode | No — three speed settings |
| Controls | Touch panel, VeSync app, Alexa / Google Assistant | Dial |
| Noise | ~28 dB on low (manufacturer) | Quiet on low; audible fan on medium/high |
| Extras | Aroma tray, auto shut-off when empty, display-off night mode | UV water treatment chamber; dishwasher-safe tank and base parts |
| Filter | None (ultrasonic) — distilled water recommended | Replaceable wicking filter (HAC-504 type), 1–3 months |
| Warranty | 2 years | 3 years |
Still deciding?
Read the full reviews for the complete story, or check both current prices — sale pricing swings this class of decision all the time.
~$80 typical price
Buy on Amazon~$76 typical price
Buy on Amazon