Is the LEVOIT OasisMist 450S Smart Warm and Cool Mist Humidifier worth it?
Yes, for the right buyer. The LEVOIT OasisMist 450S Smart Warm and Cool Mist Humidifier ranks #4 in our Best Humidifiers for Allergies list. Its biggest strength: warm and cool mist. The ma in caveat: built-in humidity sensor can read high near walls.
Alternatives to the LEVOIT OasisMist 450S Smart Warm and Cool Mist Humidifier
Products ranked near it in our research, each better for a slightly different buyer.
Buying advice: humidifiers
- 1Ultrasonic cool mist models are quiet and efficient. Evaporative models use a wick and fan and cannot over-humidify. Warm mist models boil water, which reduces germs but uses more power and is a burn risk around children.
- 2Match output to the room. A small unit in a large living area will run constantly without raising humidity much.
- 3Look for a wide-mouth — top-fill tank and few hidden crevices. Clean weekly and change water daily.
- 4Ultrasonic humidifiers can spread minerals from hard tap water as white dust. Distilled water or a demineralization cartridge prevents it.
- 5A built-in humidistat stops the unit at your target level and saves you from over-humidifying.
Read the full guides
- How to Choose a Humidifier
- Humidifiers Buying Guide
- Humidifier Leaking
- Humidifier Not Producing Mist
More humidifiers shortlists
- Best Humidifiers for Allergies
- Best Humidifiers for Babies and the Nursery
- Best Humidifiers for Dry Winter Air
- Best Humidifiers for Large Rooms
- Best Humidifiers Under $100
- Best Humidifiers Under $40
Our picks
Products we recommend
As an Amazon Associate I earn from qualifying purchases. Picks are based on manufacturer specs, independent reviews and owner reports.
LEVOIT
5L smart humidifier with warm and cool mist, auto humidity mode and app control.
✓ Pros
- Warm and cool mist
- Auto mode targets 40 to 60% humidity
- Large tank with long runtime
- App and voice control
✕ Cons
- Built-in humidity sensor can read high near walls
- Filters and pads add running cost
- Warm mist uses more power
Honeywell
Wicking filter cannot over-humidify the nursery, an important safety marg in for a baby's room
- 1.1-gallon tank
- Wicking filter design
- Cool mist, no burn risk
- Dishwasher-safe parts
- Self-regulating output
✓ Pros
- Wicking filter cannot over-humidify the nursery, an important safety marg in for a baby's room
- No mineral dust output, which matters for a baby's developing lungs
- Dishwasher-safe tank and base make the frequent cleaning nurseries need much easier
✕ Cons
- Fan noise is audible, though most parents describe it as gentle white noise
- Replacement filters add a recurring cost
- 1.1-gallon tank needs a refill most nights
Levoit
≤30dB Sleep Mode is quiet enough to run inches from a crib without waking a light sleeper
- 6L top-fill tank, up to 60 hours runtime
- ≤30dB on Sleep Mode
- Cool mist ultrasonic, no burn risk
- Auto Mode humidity sensor
- Night light
✓ Pros
- ≤30dB Sleep Mode is quiet enough to run inches from a crib without waking a light sleeper
- 60-hour tank runtime means parents rarely refill mid-night
- Cool mist eliminates the scald risk of a warm mist unit near a crawling baby
✕ Cons
- 6L tank is large and heavy to carry to the sink for cleaning
- Needs weekly descaling to prevent mineral buildup with hard tap water
- Premium price versus a basic drugstore humidifier
TaoTronics
Cool mist and auto shut-off cover the core nursery safety requirements at a lower price
- 4L tank
- Cool mist ultrasonic
- LED humidity display
- Waterless auto shut-off
- Quiet operation
✓ Pros
- Cool mist and auto shut-off cover the core nursery safety requirements at a lower price
- LED humidity readout removes the guesswork of a dial-only unit
- 4L tank covers a full overnight run for a standard-size nursery
✕ Cons
- No smart app or voice control
- Filter is a recurring replacement cost
- Fewer total ratings than the Levoit or Honeywell, less long-term reliability data
Vicks
Typically the cheapest unit in this price tier, leaving room in the budget
- 1-gallon filter-free tank
- Up to 24 hours runtime
- VapoPad and VapoSteam compatible
- Covers up to 600 sq ft
- Under $50
✓ Pros
- Typically the cheapest unit in this price tier, leaving room in the budget
- Filter-free design skips a recurring cost entirely
- VapoSteam compatibility adds genuine cold and flu season value
✕ Cons
- No smart features, dial control only
- Higher electricity draw than ultrasonic cool mist units
- Warm mist reservoir is a burn hazard around small children
FAQ
Common questions
Is the LEVOIT OasisMist 450S Smart Warm and Cool Mist Humidifier worth buying?
Yes, for the right buyer. The LEVOIT OasisMist 450S Smart Warm and Cool Mist Humidifier ranks #4 in our Best Humidifiers for Allergies list. Its biggest strength: warm and cool mist. The ma in caveat: built-in humidity sensor can read high near walls.
Who is the LEVOIT OasisMist 450S Smart Warm and Cool Mist Humidifier best for?
Based on our research it suits allergies and large rooms. It's ranked #4 of 4 in our Best Humidifiers for Allergies list.
What are the downsides of the LEVOIT OasisMist 450S Smart Warm and Cool Mist Humidifier?
The ma in trade-offs owners and reviewers point to: built-in humidity sensor can read high near walls; filters and pads add running cost; warm mist uses more power.
What are the best alternatives to the LEVOIT OasisMist 450S Smart Warm and Cool Mist Humidifier?
Worth comparing: Honeywell HCM350B Germ Free Cool Mist Humidifier, LEVOIT Classic 300S Smart Humidifier and TaoTronics TT-AH001 Cool Mist Humidifier 4L. Each ranks near it in our research for a slightly different buyer.
Where can I buy the LEVOIT OasisMist 450S Smart Warm and Cool Mist Humidifier?
It's sold on Amazon. Prices and stock change often, so check the current listing before you buy, our link takes you straight to it.
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