Why it matters
The Dreo HM524 Humidifier is an ultrasonic humidifier with a 6 liters tank, rated for 500 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.
A full tank holds about 6.0 liters, which adds roughly 13 pounds of water to carry or lift to the sink and back.
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 Bedrooms, Best Cool Mist Humidifiers, where it is ranked against every model that meets the same rule.
Compared with the Dreo HM311S Humidifier: rated room size 500 square feet here vs 300 square feet; run time 60 hours here vs 36 hours.
Who it's for, and who should skip it
Good fit if
- Dry winter bedrooms
- 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 500 square feet
Cons
- Needs regular cleaning to stay hygienic
- Ultrasonic mist leaves white dust with hard water
Limitations to weigh
- Not stated on the Dreo HM524 Humidifier listing: power draw. Ask the seller or check the manual before relying on it.
Specifications
The bracket shows where each figure comes from.
| Model number | DR-HHM004 | Retailer |
|---|---|---|
| Room coverage | 500 square feet | Retailer |
| Noise (seller) | 28 dB | Retailer |
| Capacity | 6 liters | Retailer |
| Run time per fill | 60 hours | Retailer |
Alternatives worth comparing
More room humidifiers we cover
- Vivosun H05 Humidifier
- Lacidoll 16L Whole Room Humidifier
- Honeywell HCM35 Humidifier
- AIRCARE Valiant 5 Gal. Whole House Cool Mist Evaporative Console Humidifier $239.99
- Lacidoll LCD-MH-2301J Humidifier
All room humidifiers, compared in one table · Every Dreo product we cover
Final verdict
A sensible choice for dry winter bedrooms. Confirm the model it fits before ordering.
Where to buy
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