Contents14
- Rated power by mode at a glance
- How warm mist, steam, evaporative and hybrid differ
- What the power figures mean for the bill (per 100 mL/h)
- Cleaning and noise
- What “hybrid” means on a listing
- Picks by condition
- Evaporative, with no heater
- Heats the water (steam or warm mist), with a maker spec page
- Heats the water, with a maker-rated output of 480 mL/h or more (it makes warm and cool mist)
- FAQ
- Is a hybrid humidifier more expensive to run than an evaporative one?
- How much electricity does a humidifier use overnight?
- What’s the difference between warm mist and cool mist?
- Is a hybrid humidifier easier to clean?
Only one of the US models checked lists official power for both modes. On it, warm mist uses more than 6 times the power of cool mist per 100 mL/h. A hybrid humidifier in the US often makes both warm and cool mist, as this one does.
Comparing power per 100 mL/h puts models with different output on the same footing. It’s worked out from official specs as of November 2026.
Rated power by mode at a glance
The model names are in the picks section and the data section at the end.
| Type (US models checked) | Rated power on the official page |
|---|---|
| Cool mist side of a warm and cool mist hybrid | 26 W |
| Warm mist side of the same model | 280 W |
| Evaporative pick | Not on the official page |
| Steam or warm mist pick | Not on the official page |
To compare another model, divide its rated power by its rated output and multiply by 100. This needs both figures on the official page.
Humidifier power by mode
Pick a mode and how many hours a day you run it. It shows the official rated power, how warm and cool mist compare per 100 mL/h, and the energy for those hours.
For these settings
For these settings
For these settings
How warm mist, steam, evaporative and hybrid differ
In the US, a “hybrid” humidifier often means a model with both warm and cool mist. Japan’s “hybrid” is a different design (warm-air evaporative), so those models aren’t compared here.
Makers use “hybrid” for different pairings, so check the official page for which modes a model has.
- A warm mist or steam model heats the water before it leaves the unit.
- The EPA says ultrasonic and impeller humidifiers spread the minerals in tap water into the air, which shows up as white dust, and suggests low-mineral water such as distilled.
What the power figures mean for the bill (per 100 mL/h)
Comparing rated power per 100 mL/h of output, one US model’s 280 W warm mist uses over 6 times the power of its 26 W cool mist.
This ratio comes from one model’s two modes, each with its own official rated power and output, so it doesn’t show what other warm and cool mist models use.
The evaporative and steam picks list no official power, so no ratio is worked out against them.
Over an assumed 8-hour night, one US model’s 280 W warm mist uses more energy than its 26 W cool mist, if rated power runs all night.
The rated power is the most the official page lists, and it doesn’t say how long the heater runs, so real use can be lower.
Cleaning and noise
None of the official pages checked gives a cleaning schedule for any type, so this guide doesn’t rank the types on upkeep.
Noise isn’t compared here: official noise figures weren’t checked by type.
What “hybrid” means on a listing
The data section at the end lists the official figures for the US models checked, with “Not on the official page” where a maker gives none.
Per the US makers’ official pages, room size is given in square feet, and the Vicks V750 page gives none.
Picks by condition
Warm mist and steam models heat the water; evaporative models have no heater. In the US sense of the word, a hybrid is a model that makes both warm and cool mist, so the third pick is the one that fits.
Evaporative, with no heater
The official page lists no power figure.
Heats the water (steam or warm mist), with a maker spec page
Power isn’t on its official page either.
Heats the water, with a maker-rated output of 480 mL/h or more (it makes warm and cool mist)
It’s ultrasonic with a warm mode, rated 280 W and 500 mL/h on warm mist, and 26 W and 300 mL/h on cool mist.
Picks meet these rules: 100+ ratings, 4+ stars, new, and sold by Amazon or the brand. Each is the lowest-priced of the listings checked that meets its slot’s condition.
The steam-or-warm-mist picks need a maker spec page; a listing whose only source is an Amazon.com page doesn’t count.
Check prices on Amazon.com before buying.
FAQ
Is a hybrid humidifier more expensive to run than an evaporative one?
The official pages for the evaporative and steam picks list no power figure, so that comparison can’t be made. On the one US model checked with official figures for both modes, warm mist uses more than 6 times the power of cool mist per 100 mL/h.
How much electricity does a humidifier use overnight?
Over an assumed 8-hour night, at rated power, one US model uses about 2.24 kWh on warm mist and 0.21 kWh on cool mist. The data section at the end lists the cost range.
What’s the difference between warm mist and cool mist?
A warm mist or steam model heats the water before it leaves the unit. Makers use “hybrid” for different pairings, so check the official page for which modes a model has.
Is a hybrid humidifier easier to clean?
None of the official pages checked gives a cleaning schedule for any type, so this guide doesn’t rank the types on upkeep.
Data and formulas used (for verification)
How this was checked: In November 2026, official specs for the US models listed in the data section and their Amazon.com listings were checked. No unit was tested. Electricity cost is rated power times hours times the EIA average residential price, shown as a range in the data section. It assumes the rated power the whole time; see the bill section for what that means.
Method
- Covers the official specs of US humidifiers on the makers’ pages (Levoit, DREO, Vornado, Vicks) and Amazon.com listings as of November 4, 2026. No unit was tested.
- Only official spec figures are used; numbers taken from a store listing are labeled as such.
- Energy = rated power (official) x hours a day (assumed 8-24). Models with different output are compared per 100 mL/h.
Official figures for the US models checked (a row marked retailer page is not from the maker)
| Model | Type | Power | Output | Tank | Source |
|---|---|---|---|---|---|
| Vicks Warm Steam Vaporizer | Warm mist | Not on the retailer page | Not on the retailer page | 1.5 gal (Amazon listing) | retailer page, amazon.com |
| Vicks V750 Warm Mist Humidifier | Warm mist | Not on the official page | Not on the official page | 1.0 gal | vickshumidifiers.com |
| Levoit OasisMist 450S | Ultrasonic + warm | 280 W | Not on the official page | 4.5 L (1.19 gal) | levoit.com |
| Levoit LV600S | Ultrasonic + warm | 280 W | warm 550 cool 300 mL/h | 6 L (1.58 gal) | levoit.com |
| DREO HM713S | Ultrasonic + warm | 280 W warm / 26 W cool | warm 500 cool 300 mL/h | 6 L | dreo.com |
| Honeywell HCM350B | Evaporative | 60 W (retailer page) | Not on the retailer page | 1.1 gal | retailer page, honeywellstore.com |
| Vornado EVAP40 | Evaporative | Not on the official page | Not on the official page | 4 gal | vornado.com |
- Energy and cost at the rated power, assuming it runs the whole time (a range, not a forecast): the DREO HM713S uses 2.24 to 6.72 kWh a day on warm mist and 0.21 to 0.62 kWh on cool mist, costing about $0.39 to $1.22 and $0.04 to $0.11 a day. Hours a day are assumed at 8 to 24. Price assumed at 17.23 to 18.16 cents/kWh (EIA U.S. residential average: 2025 annual and August 2026, from a summary of Electric Power Monthly Table 5.3, not the table itself). Your local rate may differ.
- Ratio: (280 ÷ 500) ÷ (26 ÷ 300) = 6.46 → about 6x (rounded down).
- The Honeywell HCM350B was left out: the only spec page found is a retailer’s (honeywellstore.com), listed under part number HUL525W.
- Left out of the “Evaporative, with no heater” slot: Vicks Warm Steam Vaporizer: outside the slot condition (heats the water). Vicks V750 Warm Mist Humidifier: outside the slot condition (heats the water). Levoit OasisMist 450S: outside the slot condition (heats the water). Levoit LV600S: outside the slot condition (heats the water). Honeywell HCM350B: excluded: only a retailer’s spec page was found, under a different part number. DREO HM713S: outside the slot condition (heats the water)
- Left out of the “Heats the water (steam or warm mist), with a maker spec page” slot: Vicks Warm Steam Vaporizer: outside the slot condition (no maker spec page; the only source is an Amazon.com listing). Levoit OasisMist 450S: meets the rules but costs more than the pick. Levoit LV600S: meets the rules but costs more than the pick. DREO HM713S: meets the rules but costs more than the pick
- Left out of the “Heats the water, with a maker-rated output of 480 mL/h or more” slot: Vicks Warm Steam Vaporizer: outside the slot condition (no maker spec page; the only source is an Amazon.com listing). Vicks V750 Warm Mist Humidifier: outside the slot condition (output isn’t on the official page). Levoit OasisMist 450S: outside the slot condition (output isn’t on the official page). Levoit LV600S: meets the rules but costs more than the pick
Official values used
| Item | Value | Source | Checked |
|---|---|---|---|
| US humidifier official specs (verified subset) | Levoit 450S: 280W, 4.5 L (1.19 gal), up to 45 h. Levoit LV600S: 280W, 6 L (1.58 gal), 300 mL/h cool / 550 mL/h warm, 430-753 ft2. DREO HM713S: 26W cool / 280W warm, 6 L, 300/500 mL/h. Honeywell (honeywellstore): 1.1 gal, 24 h, 60 W. Vornado EVAP40: 4 gal per 24 h, up to 1,000 sq ft. Vicks V750: 1.0 gal, up to 24 h. | levoit.com | 2026-11-04 |
Humidifier power by mode: quick reference
The calculator in this article shows the result for your own settings. Settings can be set in the URL; each link below opens the calculator with those settings.
| Settings | Result | Calculator |
|---|---|---|
| Warm mist (hybrid), 8 hours | △ About 6x cool mist per 100 mL/h. DREO HM713S lists 280 W and 500 mL/h on warm mist. Over 8 hours at rated power that’s about 2.24 kWh. Same model on cool mist: about 0.21 kWh for the same hours | Open with these settings |
| Cool mist (hybrid), 8 hours | ✓ 26 W rated on cool mist. DREO HM713S lists 26 W and 300 mL/h on cool mist. Over 8 hours at rated power that’s about 0.21 kWh. Same model on warm mist: about 2.24 kWh for the same hours | Open with these settings |
| Evaporative pick, 8 hours | △ No official rated power. Vornado EVAP40’s official page gives no rated power, so no energy figure is worked out. To compare it, divide its rated power by its rated output and multiply by 100, once both figures are on the official page | Open with these settings |
| Steam or warm pick, 8 hours | △ No official rated power. Vicks V750 Warm Mist Humidifier’s official page gives no rated power, so no energy figure is worked out. To compare it, divide its rated power by its rated output and multiply by 100, once both figures are on the official page | Open with these settings |
| Warm mist (hybrid), 24 hours | △ About 6x cool mist per 100 mL/h. DREO HM713S lists 280 W and 500 mL/h on warm mist. Over 24 hours at rated power that’s about 6.72 kWh. Same model on cool mist: about 0.62 kWh for the same hours | Open with these settings |
| Cool mist (hybrid), 24 hours | ✓ 26 W rated on cool mist. DREO HM713S lists 26 W and 300 mL/h on cool mist. Over 24 hours at rated power that’s about 0.62 kWh. Same model on warm mist: about 6.72 kWh for the same hours | Open with these settings |
