What to look for
- Ultrasonic models are quieter; evaporative models avoid white dust from hard water.
- Keep indoor humidity between 30 and 50 percent to prevent mould.
- Easy cleaning matters more than features because humidifiers must be cleaned weekly.
- Top-fill tanks are much easier to refill.
How much to spend
Typical prices run from £39 to £869. Budget models cover the basics; spending more usually buys quiet, smart and easy to fill. Only pay for features you will use.
Who should skip what
- Skip the LEVOIT Classic 300S Smart if you have hard water and do not want to clean white dust; use distilled water or an evaporative model
- Skip the Honeywell HCM350E Germ-Free Cool if you want the quietest option; the fan is audible
- Skip the LEVOIT Dual 200S Smart if you have very hard water or a large room
- Skip the Dyson Purifier Humidify+Cool PH03 if you want value; a separate HEPA purifier and humidifier cost a fraction of the price and work as well
Buying tips
Humidifiers sell out in winter, so buy in autumn. Prices dip on Prime Big Deal Days in October and Black Friday.
Our picks
See all our best humidifiers in the uk for more options.
Recommended products
Best overallLevoit · Humidifiers
LEVOIT Classic 300S Smart Ultrasonic Cool Mist Humidifier 6L
Quiet and smart.
- Verdict
- Buy
- Best for
- Bedrooms
- Typical price
- £69–£89
Pros
- Top fill
- Auto humidity mode
Cons
- Ultrasonic can leave white dust with hard water
Best for hard waterHoneywell · Humidifiers
Honeywell HCM350E Germ-Free Cool Mist Humidifier
No white dust.
- Verdict
- Buy
- Best for
- Hard water homes
- Typical price
- £69–£89
Pros
- No white dust
- Self-regulating evaporation
Cons
- Wicks need replacing
Best budgetLevoit · Humidifiers
LEVOIT Dual 200S Smart Top-Fill Humidifier 3L
Cheap, quiet and top-fill for small bedrooms.
- 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
What humidity should my home be?
Between 30 and 50 percent. Use a hygrometer or a humidifier with auto mode to stay in range.
Should I use distilled water?
In ultrasonic humidifiers, distilled water prevents white mineral dust. Evaporative humidifiers handle tap water better.
How often should I clean a humidifier?
Rinse and refill daily and clean thoroughly once a week to prevent mould and bacteria.