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Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) vs Levoit Classic 300S Ultrasonic Smart Humidifier
Which one has the downsides you can live with?
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The short answer
Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) ranks higher (#1 vs #4 of 8) and scores better on humidifying power, easy cleaning.
The biggest complaint about the Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) is breaks or cracks within a season or two; for the Levoit Classic 300S Ultrasonic Smart Humidifier it's leaks. Pick the one whose catch bothers you less.
Side by side
| Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) | Levoit Classic 300S Ultrasonic Smart Humidifier | |
|---|---|---|
| Rank in humidifiers | #1 | #4 |
| Price tier | $$ | $$ |
| Type | Ultrasonic | Ultrasonic |
| Amazon 1–2★ share | 11% | 10% |
| Overall score | 3.8 | 3.6 |
| Humidifying power | 5.0 | 4.0 |
| Easy cleaning | 3.5 | 3.0 |
| Quietness | 4.5 | 4.5 |
| Tank & runtime | 4.0 | 4.0 |
| Running cost | 3.5 | 3.5 |
| Durability | 2.5 | 2.5 |
Price tiers: $ under $60 · $$ $60–150 · $$$ over $150. Highlighted = clearly better (a score gap of 0.3 or more, or a 1–2★ share at least 3 points lower). Scores are explained, with sources, on each product's page.
Top complaints
Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist)
- Breaks or cracks within a season or two
Reliability and durability are negative aspects in Amazon's review summary (durability: 101 of 142 mentions negative), with owners describing units that stopped working, tanks that cracked and leaked, and units that broke after about 1.5 years.
- Humidity control gets erratic over time
Wirecutter's tests found the auto mode accurate, but it has heard from readers, staff and Amazon reviewers that the humidity reading becomes unreliable over time. Resetting the unit (hold power for 15 seconds) often helps. Amazon's summary calls humidity output mixed, with some owners saying no mist comes out at all.
- White dust and a fiddly base
Wirecutter warns that, like other ultrasonics, it can leave a trail of fine mineral dust unless you use distilled or filtered water, and the base has nooks that are annoying to clean. Amazon owners are split on cleaning, with some saying there are too many parts to take apart.
- Warm mist runs dangerously hot
Wirecutter notes the warm-mist heating element can get dangerously hot and cites the Mayo Clinic's advice against warm-mist models in homes with children. It also recommends skipping the essential-oil tray.
Source: Wirecutter
Levoit Classic 300S Ultrasonic Smart Humidifier
- Leaks
Leakage is a negative aspect in Amazon's review summary (607 of 668 mentions negative), with owners saying it leaks everywhere. Wirecutter says Amazon reviewers and a few staffers found the tank started leaking after a few months, some pointing to the float-valve rubber stopper.
- Breaks within months
Durability is negative on Amazon (411 of 570 mentions), with owners reporting units that broke within about three months or turned off constantly.
- Crevices that are tedious to clean
Good Housekeeping's only listed con is a base with many cracks and crevices. Wirecutter found the area around the mist chimney and the water channel in the basin tricky to scrub. The Spruce, however, found it easy to clean.
- Shorter runtime than claimed; clunky app
CNN Underscored's 6 L tank lasted about 39 hours on low against Levoit's 60-hour claim, and it struggled in medium-size rooms. CNN also called the VeSync app buggy, and Wirecutter found the icon-only buttons counterintuitive.
- White film with tap water
Wirecutter says you should use distilled or demineralized water, or the mist can leave a chalky white film across the room.
Source: Wirecutter
Who should pick which
Pick the Levoit LV600S Smart Hybrid Ultrasonic Humidifier (Warm & Cool Mist) if
Medium to large rooms
People who want warm and cool mist in one unit
Smart-home control and auto humidity
Skip it if: You won't buy distilled water; You have small children (warm-mist mode gets very hot); You want a unit that reliably lasts many seasons
Pick the Levoit Classic 300S Ultrasonic Smart Humidifier if
Bedrooms and medium rooms
Quiet overnight use
App and voice control on a mid-range budget
Skip it if: A leak onto furniture or floors would be a disaster; You hate scrubbing crevices; You won't use distilled water
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