Our verdict on the LEVOIT Classic 300S Smart Ultrasonic Cool Mist Humidifier 6L
- Buy it if
- You want a quiet, top-fill humidifier with an app and auto humidity mode for a bedroom.
- Skip it if
- You have hard water and do not want to clean white dust; use distilled water or an evaporative model.
- Best for
- Bedrooms
- Key feature
- Quiet, smart and easy to fill
- Typical price
- £69–£89
Key specifications
| Tank | 6 L |
|---|---|
| Run time | Up to 60 hours |
Who should buy it, and who should skip it
A good fit if you
- want a quiet, top-fill humidifier with an app and auto humidity mode for a bedroom
- value top fill
- can spend around £69–£89
Skip it if you
- have hard water and do not want to clean white dust; use distilled water or an evaporative model
- mind that ultrasonic can leave white dust with hard water
Pros and cons
Pros
- Top fill
- Auto humidity mode
- App and voice control
- Very quiet
Cons
- Ultrasonic can leave white dust with hard water
- Needs weekly cleaning
What it is
The LEVOIT Classic 300S Smart Ultrasonic Cool Mist Humidifier 6L is a humidifier from Levoit, typically £69–£89. Its headline feature is quiet, smart and easy to fill, and it is best for bedrooms.
What stands out
- Top fill
- Auto humidity mode
- App and voice control
- Very quiet
What to know
- Ultrasonic can leave white dust with hard water
- Needs weekly cleaning
Is it worth it?
If you want a quiet, top-fill humidifier with an app and auto humidity mode for a bedroom, the LEVOIT Classic 300S Smart is a strong choice. If you have hard water and do not want to clean white dust; use distilled water or an evaporative model, look elsewhere. The Honeywell HCM350E Germ-Free Cool (£69–£89) is the alternative for hard water homes. The LEVOIT Dual 200S Smart (£39–£55) is the alternative for small bedrooms on a budget.
Alternatives worth considering
Honeywell · Humidifiers
Honeywell HCM350E Germ-Free Cool Mist Humidifier
Buy it if You have hard water and want an evaporative humidifier that will not over-humidify.
- Verdict
- Buy
- Best for
- Hard water homes
- Typical price
- £69–£89
Pros
- No white dust
- Self-regulating evaporation
Cons
- Wicks need replacing
Levoit · Humidifiers
LEVOIT Dual 200S Smart Top-Fill Humidifier 3L
Buy it if You want a cheap, quiet humidifier for a small bedroom or nursery.
- Verdict
- Consider
- Best for
- Small bedrooms on a budget
- Typical price
- £39–£55
Pros
- Low price
- Top fill
Cons
- Small 3 L tank
Frequently asked questions
Is the LEVOIT Classic 300S Smart Ultrasonic Cool Mist Humidifier 6L worth it?
Yes. The LEVOIT Classic 300S Smart stands out for quiet, smart and easy to fill, and it suits you if you want a quiet, top-fill humidifier with an app and auto humidity mode for a bedroom. Skip it if you have hard water and do not want to clean white dust; use distilled water or an evaporative model.
Who should skip it?
If you have hard water and do not want to clean white dust; use distilled water or an evaporative model, an alternative will suit you better.
Is the LEVOIT Classic 300S Smart worth it?
Yes. The LEVOIT Classic 300S Smart stands out for quiet, smart and easy to fill, and it suits you if you want a quiet, top-fill humidifier with an app and auto humidity mode for a bedroom. Skip it if you have hard water and do not want to clean white dust; use distilled water or an evaporative model.
What are the downsides of the LEVOIT Classic 300S Smart?
Ultrasonic can leave white dust with hard water. Needs weekly cleaning