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LevoitClassic 300S Ultrasonic smart humidifier

Ultrasonic

£79.99View retailers

Test score

Lowest available price

£79.99Amazon

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The Levoit Classic 300S Ultrasonic Smart humidifier can be controlled remotely using a smartphone app. It also has an aromatherapy diffuser and a hygrostat designed to self-regulate the device to your desired humidity. Read our full review of this humidifier to find out if it’s a Best Buy.

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What's included?

What is it?
How effective is it at moistening the air?
How easy is it to use and clean?
How noisy is it?
Is there anything else I should know?
Should I buy it?

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KEY TEST RESULTS
Humidification capacity
Energy efficiency
Ease of use

Feb 2024First reviewed by Which?
Jul 2022Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

Humidification capacity

How we test humidification capacity

We run each humidifier on its maximum setting for one hour starting at a relative humidity level of 35% and temperature of 27°C. We measure the relative humidity level at the end of the test and the volume of water used and create a star rating based on how much water is released into the atmosphere.

Quietness

How we test quietness

Our expert lab testers measure the decibel levels for each humidifier on the lowest and highest setting, as well as giving a subjective rating on how noisy they think each dehumidifier is. They will flag if a device makes any strange sounds such as dripping or whining.

Ease of use

Overall
Cleaning and descaling

How we test ease of use

This star rating reflects a combination of different ease-of-use tests, including how simple it is to use the controls, understand the instructions, fill the water tank, and clean and descale the device, and whether it's stable when set up and easy to move the unit around.

Energy efficiency

How we test energy efficiency

During our humidity test, we measure the energy consumption of each humidifier. A less energy efficient humidifier will cost you more to run than a more energy efficient one.

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