10 Best Oil Diffusers 2025 in the United States

The Levoit Smart Humidifier is a large-room ultrasonic diffuser designed to cover up to 505 square feet, making it a suitable choice for bedrooms, nurseries, or medium to large living areas. Its sizable 6-liter water tank supports up to 60 hours of continuous use, which reduces the frequency of refills. The top-fill design facilitates easier refilling and cleaning, helping to avoid leaks and hard-to-reach spots.

This humidifier operates very quietly (30dB or less), ensuring it won’t disturb sleep or daily activities. It features multiple modes tailored to different times of day, such as Auto Mode for consistent humidity, Sleep Mode for quiet nighttime use, and Plant Mode to help keep houseplants healthy. Additionally, it supports adding essential oils through aroma pads for aromatherapy benefits. A standout feature is the smart app and voice control, allowing you to monitor and adjust settings remotely, which adds convenience for customizing schedules or checking humidity without being near the unit.

Constructed from durable materials with a modern gray square design, the device fits well in various home styles. It requires occasional filter and aroma pad replacements, and using distilled water is recommended for optimal performance and health. Although it lacks advanced lighting features like color-changing LEDs, it effectively focuses on humidification and scent diffusion. For those seeking a quiet, smart-controlled diffuser that also functions as a humidifier for large spaces, this Levoit model delivers strong performance along with user-friendly features, with some routine maintenance needed.