Warm and cool mist humidifiers (2026)
For anyone who wants the option of warm mist: every humidifier here can heat the water for warm mist or run cool, as its maker states. All three we catalogued are on this list, ordered by stated room size, smallest first. Specs checked October 19, 2026 on each manufacturer's US site.
Selection criteria
- The maker states warm and cool mist settings.
Specs checked on each maker's page.
The picks
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✓ matches · – doesn't match · ? not stated by the maker
Dreo HM717S
8 LTank size
28 dBNoise level
- Run time on one tank80 hours
- Room size600 sq ft
- Filter or wick neededNot stated
Dreo states 600 sq ft, an 8 L tank and an 80-hour run time for the HM717S warm and cool hybrid humidifier, with humidity control to within 5%.
Maker source: dreo.com
Levoit LV600HH Hybrid Ultrasonic Humidifier
6 LTank size
36 hoursRun time on one tank
- Noise levelNot stated
- Room size753 sq ft
- Filter or wick neededNo
Levoit rates the LV600HH for up to 753 sq ft, with warm or cool mist, a 6 L tank, a built-in humidity sensor and a remote control.
Maker source: levoit.com
Levoit LV600S Smart Hybrid Ultrasonic Humidifier
6 LTank size
50 hoursRun time on one tank
- Noise levelNot stated
- Room size753 sq ft
- Filter or wick neededNot stated
Levoit rates the LV600S for up to 753 sq ft, with warm and cool mist, a 6 L tank for up to 50 hours and VeSync app control.
Maker source: levoit.com
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Compare these warm and cool mist humidifiers
Each value is what the manufacturer states on the linked page. "Not stated" means the maker's page doesn't list it.
| Model | Room size | Run time on one tank | Tank size | Automatic humidity control | Noise level | Technology |
|---|---|---|---|---|---|---|
| Dreo HM717S | 600 sq ft | 80 hours | 8 L | Yes | 28 dB | Not stated |
| Levoit LV600HH Hybrid Ultrasonic Humidifier | 753 sq ft | 36 hours | 6 L | Yes | Not stated | Ultrasonic |
| Levoit LV600S Smart Hybrid Ultrasonic Humidifier | 753 sq ft | 50 hours | 6 L | Yes | Not stated | Ultrasonic |
What a warm and cool mist humidifier does
A warm and cool mist humidifier has a heater as well as the part that makes mist, so you can choose warm mist or switch the heater off and run it cool. All three here hold 6 L or more and state automatic humidity control, so the differences come down to room size, run time and how you control them.
The heater changes three things you can check on the spec tables:
- Power. Levoit lists 280W rated power for the LV600HH and LV600S, against 26W for its cool-mist Classic 300S. The heater accounts for most of that difference.
- Output. Levoit states a higher maximum output on warm (500 mL/h for the LV600HH and 550 mL/h for the LV600S) than on cool (300 mL/h for both). Dreo states a maximum mist output of 550 mL/h for the HM717S without splitting warm and cool.
- Water use. Dreo's FAQ for the HM717S says the warm mist function "will use up water faster", so treat the stated run time, measured on the lowest setting, as the most you can expect.
Dreo also says the HM717S lets you adjust the warm mist temperature "from 113°F to 130°F". Levoit states no mist temperature for its two models.
None of the 24 humidifiers in our finder is warm mist only; every warm model here also runs cool.
How to pick between these
- If you want the longest time between refills → the Dreo HM717S, stated at 80 hours on its 8 L tank. The LV600S states 50 hours and the LV600HH 36 hours on 6 L tanks.
- If the room is large → the two Levoits are rated for 753 sq ft, the top of their 430–753 sq ft range; the Dreo HM717S is rated for 600 sq ft.
- If you want phone app control → the Levoit LV600S is the VeSync app version of the LV600HH; the Dreo HM717S also states app control. The LV600HH comes with a remote control instead.
- If you want the maker to state no filter is needed → the Levoit LV600HH, which Levoit describes as having a "filterless design". The other two pages don't say either way.
- If you want a stated noise figure → the Dreo HM717S states 28 dB; the Levoit pages describe "near-silent noise levels" without a number, so we show their noise as not stated.
Didn't find a fit?
See warm and cool mist humidifiers in the finder; you can add your room size and budget there, or see warm and cool mist models under $100. Related lists: Humidifiers for large rooms, Evaporative humidifiers. The humidifier buying guide compares cool and warm mist.
How these were chosen
3 of the 24 humidifiers in our finder (as of October 27, 2026) are warm and cool mist models by their maker's description, and all three are here, ordered by stated room size, smallest first.
Written with AI assistance from manufacturer specifications; reviewed and approved by the site owner. We don't test products hands-on. How we choose
Sources (manufacturer pages, checked October 19, 2026):
Written with AI assistance from manufacturer specifications and reviewed before publishing in October 2026. We don't test products hands-on.