Levoit OasisMist 450S review
A mid-size humidifier with warm and cool mist.
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How this page was made: our picks are based on manufacturer specifications (product pages, manuals and spec sheets, all linked below) and aggregated owner reviews. We have not tested these products hands-on, and we do not publish invented test results, scores or star ratings. Read our methodology.
The Levoit OasisMist 450S has a 4.5 L tank and both warm and cool mist, rated for 215–430 ft². This page is based on manufacturer-published specifications and manuals plus aggregated owner reviews; we did not test the products ourselves.
Our verdict
If you want warm mist in winter in a medium bedroom, the 450S is a good fit. For longer run time or cool mist only, the Classic 300S has a bigger 6 L tank and much lower power draw.
Levoit OasisMist 450S key specs
| Spec | Levoit OasisMist 450S |
|---|---|
| Type | Ultrasonic, warm and cool mist |
| Tank | 4.5 L |
| Max output | 300 mL/h cool / 550 mL/h warm |
| Rated room | 215–430 ft² |
| Max run time | Up to 45 h on low |
| Noise | Under 26 dB (low, cool) to under 41 dB (high, warm) |
| Rated power | 280W (warm mode) |
Pros and cons
Pros
- Warm or cool mist
- Quiet on low cool
- Up to 45 h on low
Cons
- 280W in warm mode
- Smaller tank than the Classic 300S
- Warm mist uses more energy
Who it suits (and who it doesn't)
Good fit
- Medium bedrooms
- People who want warm mist
- Quiet overnight use
Look elsewhere if
- Large rooms
- Buyers who want the lowest power draw
- People who only need cool mist
What to know before you buy
- Power: warm mode draws far more than cool.
Frequently asked questions
Does the OasisMist 450S do warm mist?
Yes, up to 550 mL/h.
How long does it run?
Up to 45 h on low, per Levoit.
Did you test it?
No. This page uses manufacturer specifications and aggregated owner reviews. See how we research.
Sources
Specifications were checked against the manufacturer pages, manuals and spec sheets below in October 2026. Makers revise specs and sell regional variants, so confirm the exact model number before you buy. We do not list prices because they change daily; use the retailer link to see the current price.
Keep reading
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