
Levoit Cool Mist Humidifier Gray
Score: 82/100
Vicks SleepyTime
Score: 72/100Rankings

The Levoit Classic 300S is an ultrasonic smart humidifier designed for bedrooms and large rooms, featuring a 6-liter top-fill tank and WiFi connectivity. It delivers up to 60 hours of continuous mist on low settings while operating quietly at ≤30dB, making it suitable for nighttime use. It is ideal for users seeking smart home integration and aromatherapy features.

The Vicks 3-in-1 SleepyTime Humidifier is a compact, filter-free ultrasonic unit designed for small rooms, combining humidification with a night-light and scent pad diffuser. Its main limitation is the requirement for distilled water to avoid white dust and the lack of automatic humidity control. It is best suited for parents of infants or light sleepers needing a quiet, low-maintenance solution for nurseries.
| Attribute | ![]() | ![]() |
|---|---|---|
505 sq ftbest | 150 sq ft | |
6 litersbest | 2.27 liters | |
| ↓ lower better | 30 dBbest | — |
60 hoursbest | 24 hours | |
| ↓ lower better | 26 wattsbest | 28.8 watts |
| ↓ lower better | 34 cm | 20.9 cmbest |
| ↓ lower better | 19.2 cmbest | 20.7 cm |
| ↓ lower better | 24.5 cm | 21.8 cmbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Performance & Capacity(5) | ||
Coverage Area (sq ft) | 505 sq ft | 150 sq ft |
Humidification Type | Ultrasonic | Ultrasonic Cool Mist |
Tank Capacity (liters) | 6 liters | 2.27 liters |
Noise Level (dB) | 30 dB | null dB |
Runtime (hours) | 60 hours | 24 hours |
Safety & Power(1) | ||
Power Consumption (watts) | 26 watts | 28.8 watts |
Controls & Smart Features(3) | ||
Control Type | Smart App | Manual Dial |
Adjustable Humidity Range | Auto | Manual |
Smart Home Compatibility | true | false |
Physical & Build(5) | ||
Product Height (cm) | 34 cm | 20.9 cm |
Product Width (cm) | 19.2 cm | 20.7 cm |
Product Depth (cm) | 24.5 cm | 21.8 cm |
Weight (kg) | 2 kg | 1.68 kg |
Warranty Length (months) | null months | 24 months |

Products in the top-left offer the best value (high score, low price).

Professional reviewers from AllergyAsthmaTech and AchooAllergy praise the Vicks VUL500 for its cost-saving filter-free ultrasonic technology and extended 24-hour runtime on a 0.6-gallon tank, making it ideal for bedrooms. They highlight the adjustable dual nozzle as perfect for precise mist direction and commend the whisper-quiet operation suitable for nurseries. However, experts consistently warn that users must use distilled water to avoid white dust issues and note the absence of a built-in hygrometer requires separate humidity monitoring.
Everyday consumers frequently praise the humidifier for its long runtime that lasts through the night without refilling and its quiet operation that does not disturb babies or light sleepers. Users appreciate the relaxing combination of the color-changing night-light and essential oil diffuser features. Recurring complaints focus on white dust accumulation when tap water is used, over-humidification leading to wet walls, and difficulties in thoroughly cleaning the tank and nebulizer components to prevent scaling.
“Lasts all night without refilling”

“Super quiet-doesn't wake the baby”

“Love the night-light and oil diffuser for relaxation.”


