Humidifiers

Levoit LV600S (LUH-A602S-WUS)

#4 · Best Warm & Cool Mist for Large Bedrooms
6.7 /10 Our score
Lowest verified price $109.00 Amazon
Our verdict
A strong, convenient high-output choice for big bedrooms if you commit to distilled water. It is not the right tool for a truly open-plan home.

Pros

  • Largest one-hour humidity gain in TechGearLab's test
  • Top-fill tank
  • Warm and cool mist
  • App control and auto mode
  • Mid-priced

Cons

  • Needs distilled water
  • Warm mode uses about 280 W
  • Harder to clean than evaporative units
  • Measured 44.2 dB in TechGearLab's test, above the claimed 25 dB

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Last reviewed October 30, 2026
Review

What to know about Levoit LV600S (LUH-A602S-WUS)

A 6 L top-fill hybrid ultrasonic humidifier with warm and cool mist, a built-in humidity sensor and VeSync app control, rated for 430–753 sq ft and up to 50 hours. TechGearLab's 'Best for Large Rooms': it produced the largest one-hour humidity gain in their test (+24.8 points). Forbes Vetted names it best overall. Strong output for big bedrooms and living rooms, but plan on distilled water.
Editorial notes

Why it stands out

Why we like it

TechGearLab named it Best for Large Rooms after it produced the largest one-hour humidity gain in its test, a rise of 24.8 points. It is also easy to live with: top-fill, an app, auto mode and a warm option for cold winters.

It suits large bedrooms and living rooms where you want quick results and are willing to use distilled water.

What to know

Skip it if you want to use tap water or have a space over about 750 sq ft. As an ultrasonic unit it disperses the most minerals of any type, and warm mode draws around 280 W.
Performance

Score breakdown

Hygiene & Ease of Cleaning

How easy it is to fully disassemble, reach and dry every wet surface. Covers dishwasher-safe or boilable parts, mold-inhibiting features, and parts count. Weighted heavily by BabyGearLab (35%) and stressed by Babylist, Forbes and RTINGS.

5.0
Ultrasonic disperses minerals and microbes per EPA; TechGearLab says it is harder to clean.
Humidifying Performance

Ability to raise and hold nursery humidity in the 40–50% range: tested output, coverage for the room size, overnight runtime per tank, and humidistat or auto-mode accuracy.

8.2
Largest one-hour gain in TechGearLab testing, but only a 6 L tank and 753 sq ft max.
Quiet & Sleep-Friendly

Measured or rated noise, absence of gurgles and beeps, dimmable or switch-off lights, and nursery extras like a red night light or white noise that help rather than disturb sleep.

7.0
25 dB claimed; TechGearLab measured 44.2 dB at its test setting.
Health, Safety & Materials

Cool-mist or evaporative design (no burn risk), stainless or BPA-free water-contact materials, and white-dust/mineral mitigation such as demineralization filters or evaporative design. Also covers tip and leak resistance, auto shut-off, and any recalls or regulatory warnings.

5.5
BPA-free badge and CARB/Intertek marks; tap water carries PM2.5 risk (U of Alberta).
Ease of Use

Filling (top-fill vs flip-tank), controls usable in the dark, app reliability, leak-free refills, and how easy it is to move or place.

8.5
Top-fill, auto mode and app; some owner reports of sensor inaccuracy.
Value

Street price plus ongoing costs (filters, cartridges), weighed against warranty length and performance.

7.0
$109 is fair, but distilled water and 280 W warm mode add ongoing cost.
Specifications

Levoit LV600S (LUH-A602S-WUS) specs

Design

Humidifier type
Hybrid ultrasonic (warm & cool mist)

Health & materials

Water tank material
BPA-free plastic (Levoit badge)

Performance

Tank capacity
6 L
Max runtime per tank (manufacturer)
50 hours
Rated room coverage
753 sq ft
Built-in humidistat / auto mode
Yes
Mist temperature
Warm or cool

Sleep

Noise (manufacturer-rated or lab-measured)
25 dB
Built-in white-noise / sound machine
No

Ease of use

Top-fill tank
Yes

Running cost

Requires replaceable filter/cartridge
Yes

Features

Wi-Fi app / voice control
Yes

Health

White dust / mineral dispersal risk (per EPA type guidance)
High with tap water (ultrasonic); use distilled
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Lowest verified price $109.00
30-day low $109.00
90-day average $109.00
90-day low $109.00

Based on 2 retailer price observations captured during the last 90 days.

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