Does this use a filter?

yes, the Levoit Classic 300 (LEVOIT 60-Hour Top Fill Humidifiers for Bedroom Large Room (6L)) uses a filter. The product comes with one filter installed and one extra plus a small cleaning brush. Levoit recommends using their replacement filters.

Does this unit make a water gurgling noise or loud dripping noise?

I have tried several different ultrasonic humidifiers, and ALL of them have made a persistent, water-dripping, coffee-percolator sound, this one included. When this is on the lowest setting, it's quiet; any other setting, including sleep mode, sounds like a loud coffee percolator running nonstop. Impossible to sleep with it.

I'm thinking of getting an air purifier also from Levoit, is it okay to put this near one?

Please keep in mind that the design of a humidifier is to increase the water particles (humidity) in the air and an air purifier's design is to remove any airborne particles in the air. Trapped water particles may cause the filter to saturate quicker and possibly harbor mold/mildew buildup. If you would like to keep the two in the same room, we recommend running the two at different times as far away as possible.

"sleep mode .... uses a built-in humidity sensor to automatically maintain a comfortable humidity level" What is the exact humidity level? %

Hi, the intelligent sleep mode turns off all display lights and uses a humidity sensor to automatically adjust the mist level to maintain a 60% relative humidity (RH) while you sleep.

Humidifiers For Bedroom Smart Warm And Cool Mist Symptom Relief

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Description

💨 Elevate your air game—smart, silent, and soothing comfort anytime, anywhere!

ULTRA QUIET OPERATION - Whisper-quiet 26dB noise level ensures peaceful sleep or focused work environment.
EFFORTLESS TOP FILL CLEANING - 4.5L tank refills in one step with wide opening for easy cleaning—no spills, no hassle.
INSTANT RELIEF RAPID MOISTURE - Double duct design delivers faster, even humidification for sinus & sleep support.
TAILORED COMFORT WITH AUTO MODE - Automatically maintains ideal 40-60% RH for healthier air and skin hydration.
SMART CONTROL AT YOUR FINGERTIPS - Manage humidity, schedules, and mist output remotely via VeSync app or voice commands.

The LEVOIT Smart Humidifier combines a 4.5L large tank with warm and cool mist options, controlled remotely via the VeSync app or voice commands. Its double duct design ensures rapid, even humidification across rooms up to 430 sq ft, while ultra-quiet operation and auto humidity mode create a healthier, personalized environment. Easy top-fill and cleaning features make maintenance effortless, perfect for busy professionals seeking wellness and convenience.

Specifications

ASIN	B0B1DQ8KV3
Best Sellers Rank	#17,699 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #21 in Humidifiers
Brand	Levoit
Brand Name	Levoit
Capacity	4.5 liters
Color	White
Control Method	Voice
Customer Reviews	4.4 out of 5 stars 10,312 Reviews
Filter Type	Water Filter Sponge
Floor Area	430 Square Feet
Global Trade Identification Number	00810043375542
Included Components	1 × 4.5-Liter Smart Warm & Cool Mist Humidifier, Aroma Pad, Cleaning Brush, Water Filter Sponge
Item Dimensions D x W x H	10.8"D x 6"W x 11.97"H
Item Shape	Rectangular
Item Type Name	Auto Customized Humidity, Ultrasonic Top Fill Oil Diffuser for Baby and Plants, Quiet, 4.5L
Item Weight	5.3 Pounds
Manufacturer	LEVOIT
Material	BPA-Free Meterial, suitable for babies and adults
Model Name	OasisMist Smart Cool and Warm Mist Humidifiers for Bedroom Large Room Home,
Model Number	LUH-O451S-WUS
Operation Mode	Ultrasonic
Other Special Features of the Product	Aroma Diffuser, Auto Shut Off, Easy Top Fill, Humidistat, Remote Control, Run All Night, Smart Vesync APP, Timer, Voice Control, Warm and Cool Mist for Faster and Healthier Relief
Part Number	Warm & Cool Mist Top fill humidifier
Power Source	ETL Certified AC Power Adapter
Room Type	Baby,Bedroom,Bedrooms, Bedroom, Large Room, Living Room, Office
Runtime	45 hours
Smart Home Compatibility	Smart Home Compatible
UPC	810043375542
Unit Count	1.0 Count
Voltage	120 Volts
Wattage	12 watts

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