
Vicks SleepyTime
Score: 72/100
Levoit OasisMist 4.5L White
Score: 85/100Rankings

The Levoit LV600S Smart Hybrid Ultrasonic Humidifier is a large-capacity, app-controlled unit designed for whole-home use with both warm and cool mist capabilities. It features smart home integration via the VeSync app and voice assistants, along with specialized modes like plant care and aromatherapy. It provides ample moisture for household needs with intuitive controls and a built-in humidity sensor.

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 | ![]() | ![]() |
|---|---|---|
150 sq ft | 430 sq ftbest | |
2.27 liters | 4.5 litersbest | |
| ↓ lower better | — | 28 dBbest |
24 hours | 50 hoursbest | |
| ↓ lower better | 28.8 wattsbest | 280 watts |
| ↓ lower better | 20.9 cmbest | 30.4 cm |
| ↓ lower better | 20.7 cm | 15.24 cmbest |
| ↓ lower better | 21.8 cmbest | 27.43 cm |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Performance & Capacity(5) | ||
Coverage Area (sq ft) | 150 sq ft | 430 sq ft |
Humidification Type | Ultrasonic Cool Mist | Hybrid |
Tank Capacity (liters) | 2.27 liters | 4.5 liters |
Noise Level (dB) | null dB | 28 dB |
Runtime (hours) | 24 hours | 50 hours |
Safety & Power(1) | ||
Power Consumption (watts) | 28.8 watts | 280 watts |
Controls & Smart Features(3) | ||
Control Type | Manual Dial | Smart App |
Adjustable Humidity Range | Manual | 40-80% |
Smart Home Compatibility | false | true |
Physical & Build(5) | ||
Product Height (cm) | 20.9 cm | 30.4 cm |
Product Width (cm) | 20.7 cm | 15.24 cm |
Product Depth (cm) | 21.8 cm | 27.43 cm |
Weight (kg) | 1.68 kg | 2.4 kg |
Warranty Length (months) | 24 months | null 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.”




Professional reviewers highlight the LV600S's substantial mist output and intuitive controls, noting it provides ample moisture for household needs. The built-in humidity sensor is praised for its ability to track and display data over time ranges, helping users understand moisture fluctuations. While power consumption is higher than basic models, the unit operates at reasonable levels despite its large capacity.
Users generally praise the large tank capacity for reducing refill frequency and the even coverage provided by dual nozzles. The quiet operation in sleep mode and intuitive app interface are frequently highlighted as positives. Effective automatic humidity adjustments eliminate manual monitoring, and rapid mist production delivers noticeable results quickly.
