Why it matters
The Levoit Classic300 Humidifier is an ultrasonic humidifier with a 6 liters tank, rated for 505 square feet.
Run time per fill, per the maker: 60 hours.
Aim for 40 to 60 percent relative humidity indoors: drier air irritates airways and skin, wetter air feeds dust mites and mold. Use distilled or demineralized water to avoid the white mineral dust ultrasonic mist leaves behind.
The listing names a top-fill tank.
Top-fill tanks are filled from above without carrying the tank to a sink, which also makes them easier to wipe out.
A full tank holds about 6.0 liters, which adds roughly 13 pounds of water to carry or lift (filled in place from the top).
Spread over 60 hours, that tank works out to about 100 milliliters an hour, the rate on the setting the run time was measured at; higher settings empty it faster.
Its tank of 6.0 liters is above the middle of the range we cover: 51 of the 78 humidifiers with a stated figure come in lower, and the range runs from 0.7 liters to 20.1 liters.
Its stated run time of 60 hours is above the middle of the range we cover: 54 of the 69 humidifiers with a stated figure come in lower, and the range runs from 10 hours to 130 hours.
Price-wise it sat in the middle third of the 74 ultrasonic models we cover when we checked; the button shows today's price.
It qualifies for our lists Best Humidifiers for Large Rooms, Best Cool Mist Humidifiers, where it is ranked against every model that meets the same rule.
Compared with the Levoit LUH-D302-BUS Humidifier: rated room size 505 square feet here vs 290 square feet; run time 60 hours here vs 25 hours.
Who it's for, and who should skip it
Good fit if
- Large living rooms and open plans
- Owners who will clean it weekly
Look elsewhere if
- Rooms far larger than its rating
Pros and cons
Pros
- 6 liters tank
- Runs 60 hours per fill
- Rated for 505 square feet
Cons
- Needs regular cleaning to stay hygienic
- Ultrasonic mist leaves white dust with hard water
Limitations to weigh
- Not stated on the Levoit Classic300 Humidifier listing: noise level. Ask the seller or check the manual before relying on it.
Specifications
The bracket shows where each figure comes from.
| Model number | LUH-A603-WUS | Retailer |
|---|---|---|
| Room coverage | 505 square feet | Retailer |
| Wattage | 25 watts | Retailer |
| Capacity | 6 liters | Retailer |
| Run time per fill | 60 hours | Retailer |
Alternatives worth comparing
More room humidifiers we cover
- Honeywell Reflection 1.4 Gal. Cool Mist Humidifier (HUL900B) $179.99
- AIRCARE MA1201 3.6 Gal. Evaporative Whole-House Console Humidifier $149.99
- BREEZOME MG16JS Humidifier
- Homvana H101 Humidifier
- Levoit Dual 150 Ultrasonic Cool Mist Humidifier $43.99
All room humidifiers, compared in one table · Every Levoit product we cover
Final verdict
A solid choice for large living rooms and open plans. Confirm the model it fits before ordering.
Where to buy
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