Best Humidifier 2021 – Buyer’s Guide

You may be more used to hearing about dehumidifiers, which can remove excess moisture and prevent damp, but depending on your atmosphere, the air may just as likely be too dry.

When outdoor temperatures dip, moisture in your home can also disappear. Dry air can cause breathing difficulties, sensitive skin, cracked lips, sore throats and even leave you more susceptible to airborne illnesses such as colds and flu. Even your homeware could see negative effects, from drying wood floors to cracking paint or wallpaper, especially in winter when the heating is on full blast.

Humidifiers dispense a perfect amount of moisture into the air in the form of a burst of mist and could be a gamechanger if your environment is making you uncomfortable. The best one for you depends on why exactly you need more moisture, and how much you’re going to need. These are the best dehumidifiers we found and reviewed.

The Best Humidifiers – Our Top Picks

  • Dimensions: 57.9 x 24 x 13.5cm
  • Air Type: Cool
  • Air Flow Rate: 32 m3/hour
  • Capacity: 3L
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  • Dimensions: 16.5 x 16.5 x 12.3 cm
  • Air Type: Cold
  • Capacity: 400ml
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  • Dimensions: 20 x 15 x 35 cm
  • Air Type: Cool
  • Capacity: 4.5L
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Best Humidifiers

Dyson AM10

Part of Dyson’s Air Multiplier range, which includes their best-selling fans, this humidifier is a perfect tabletop model if you want something which doesn’t take over your room but still makes a difference.

When you are humidifying the air, you still want to ensure that the moisture is clean and won’t agitate any allergies or make an uncomfortable atmosphere. The Ultraviolet Cleanse™ technology removes 99.9% of bacteria from the water before it is released into your room so that you can breathe easier.

The three-litre tank means you won’t have to fill it up too much, and it could even last up to 18 hours. There are built-in sensors which can measure the temperature and moisture in the air, so it isn’t going to be working away when it isn’t needed, and Air Multiplier Technology projects the moisture across the room quickly and quietly.

A sleep timer makes it an ideal addition to any bedroom. You can set it to turn off after a certain amount of time if you need perfect peace for some shut-eye or to come on every so often to maintain a balance.


  • Dimensions: 57.9 x 24 x 13.5cm
  • Air Type: Cool
  • Air Flow Rate: 32 m3/hour
  • Capacity: 3L

We like

  • Comes with a remote control
  • Quiet Mark accreditation
  • Can also be used as a fan for cold air as well as humidity

We dislike

  • One of the most expensive - you’re also paying for the name

Final Verdict

One of the most effective on the market, which makes a huge difference in a short amount of time. It can also be used as an ordinary fan in summer

Tenswall 400ml Wood Grain Essential Oil Diffuser

If you want a humidifier for use with essential oils to help you breathe easier, then any old model isn’t going to do. You’ll need a dedicated option, and this portable model is ideal for moving wherever you go.

It should work for around ten hours on a single tank of water, which will keep you covered for most of the day. The design means it doesn’t look like a humidifier, so you can pop it anywhere in the room without it ruining the look of the overall environment.

Set the timer to 1 hour/3 hours/6 hours/steady and enjoy a continuous burst of fragrance and mist within those time frames. Or, just press the button for instant relief. There are also seven light options, from calm and collective single colours to a combination which is more flashy and fun.

It doesn’t have to be used as an aromatherapy diffuser, as you can just add plain water if you want something plain and simple. There is a beeping sound emitted when the water is empty so you know you’ll need to refill, and it will turn itself off before anything dangerous is risked.

Instructions are nice and simple, and you soon pick up what to do to get the right settings and use. There is little noise made except the occasional bubbling of the water.

It is very affordable and a great idea, although it does feel and look rather cheap in person. The lights also risk looking a little childish depending on your atmosphere, and the smell from the oils can wane off over time. Still, as we say, it is a nice price.


  • Dimensions: 16.5 x 16.5 x 12.3 cm
  • Air Type: Cold
  • Capacity: 400ml

We like

  • Compact and portable
  • Lights could add to atmosphere

We dislike

  • Just not the overall strongest option

Final Verdict

Build and performance isn’t as great as the others, but for the price, this is to be expected, and it is a bestseller

PureMate® 4.5L Digital Ultrasonic Cool Mist Humidifier

A nice big capacity and half the price of the market leaders make this a very appealing choice.

The humidity sensor can detect when action is needed, turning on and off in response to ensure a consistent feel. As it can hold 4.5L of water at any one time, you aren’t going to have to top it up often, which will allow you to leave it to its own devices for around 12 hours.

It can work in rooms up to 40m², making it one of the best for open plan homes or large rooms. You can add some of your favourite oils for a bit of a scent boost, and the illuminated water tank allows you to see the water level so you can top it up before it switches itself off automatically.

The timer option means you can set it to work in a period between 1-12 hours. This could allow you to plan ahead or conserve some energy usage. There is a separate slot at the back for the oils, so you don’t have to put them in the water and risk not being able to smell them or being overcome.

There are a couple of things to bear in mind. Firstly, try to use filtered or distilled water as hard water will damage the machine over time. You would also have to clean everything in the area often as it leaves it all covered in a bit of white dust. It is also vital you read the instructions first as there are a couple of important pointers in there, even though it is a bit of a slog to get through.


  • Dimensions: 20 x 15 x 35 cm
  • Air Type: Cool
  • Capacity: 4.5L

We like

  • Easy to refill
  • Nice size and style
  • Remote control

We dislike

  • Instruction manual isn’t great
  • Can get noisy the longer it runs

Final Verdict

It doesn’t look too bad, and it performs very well to say it is around half the cost of similar options

Bionaire Digital Ultrasonic BU7500-060

Coming complete with a warm air option as well as the ordinary cold mist, this is an ideal unit if you need something which can be adapted depending on the time of year and to cope with periodic issues such as hayfever.

The warm air is perfect for Winter when you can’t risk the temperature dipping. It also helps if you suffer from respiratory issues, as it can ease breathing and dry throats. If it runs out of water, it will automatically shut off to protect both the unit and your home.

There is a useful timer function, so you can set it to turn on at specific times. If you want the house to be perfect before you get home for work, or when you get up in the morning, the timer will allow it to get to work, so you live in comfort.

If you want to use it in the bedroom or hallway as you sleep, there is a nightlight which could come in handy if you want to create a bit of an atmosphere or don’t like the room to be in complete darkness.

As a finishing touch, the humidistat allows you to set your own perfect conditions, so whether you like it to be on the drier side or ramped up fully, it won’t go past that point or leave you disappointed.


  • Dimensions: 22.6 x 22 x 22cm
  • Air Type: Cold/Warm
  • Capacity: 2.7L

We like

  • Very quiet
  • Easy to set up to your own required specifications
  • Touch control buttons

We dislike

  • Price - there are a few options which do the same thing for less

Final Verdict

Bionaire make a whole host of great air quality products, and this humidifier will ensure your home remains comfortable at all times

Stadler Form Oskar Little Humidifier

A pricey option, but one of the more advanced in terms of all the extras and features.

There are two power levels, and it can work in rooms up to 30m2, so you can give it a quick boost to clear the room, and it will then work to keep everything consistent.

It is one of the most eco-friendly options, with a filter made of plant and textile fibres. There is no doubt that it is more economical and environmentally friendly than comparable humidifiers. If it runs out of water it will switch itself off and is easy to top up when the time comes.

There are a lot of other great things about it, too. It is super quiet when running and definitely would win the fight for the best looking humidifier on the market. Unfortunately, the user manual states it can’t be used in hard water areas so you’re going to have to filter the water thoroughly or else it will leave your possessions covered in white chalky dust and won’t work for long. The filters must also be replaced every 2-3 months, which adds to running costs. They are also hard to find, so have a hunt around before buying.


  • Dimensions: 29 x 24.6 x 18.5cm
  • Air Type: Cold
  • Air Flow Rate: 200g3/h
  • Capacity: 3.5L

We like

  • Design
  • Eco-friendly materials used
  • Suitable for aroma diffusion

We dislike

  • Water must be very pure

Final Verdict

If you’re willing to put up with these problems, then it is a stylish, effective and modern appliance which will leave your home in the best possible condition

Aennon Cool Mist Humidifier

One of the most adaptable humidifiers, you can set the desired level with complete freedom, so you get the atmosphere perfect.

It can work with oils if you need assistance clearing a blocked nose or stuffy head, and the choice to turn the power up or down will ensure you get the right amount of steam without being overcome or unaffected.

We would say this is best for small rooms, such as secondary bedrooms if the kids can’t sleep because of a blocked nose or their room is dry due to the heating. For larger living rooms or open plan spaces, it will still work, but just take quite a while to make an impact.

It is also a pain to refill, as you have to take apart the whole unit. If you need it to run all day, then this may become a pain as it lasts for around ten hours before needing a top up.


  • Dimensions: 21 x 20 x 29 cm
  • Air Type: Cool
  • Capacity: 2.8L

We like

  • Price
  • Quiet operation

We dislike

  • A faff to refill

Final Verdict

A nice affordable price, and while not the most user-friendly, it works

Babymoov Hygro Plus Ultrasonic Cool Mist Humidifier

Humidifiers for use in a baby’s bedroom is a lot more complicated than picking the one which fits the decor or your price bracket. Babies are very sensitive to their atmosphere, and the wrong conditions could see breathing issues, dry skin and a struggle sleeping.

They need to be quiet, give out the perfect level of moisture and also need to be reliable, as you may be leaving it to work its magic. You may also want something which can be entertaining though, featuring lighting which can help your little one doze off.

It is all touchscreen control for a simpler setup, and it is suitable for rooms up to 20 m² so could even be taken into the living room or kitchen when it is play or dinnertime. Control can be set to automatic monitoring, or you can do it by hand if you know the ideal point.

There is also an essential oil diffuser option, and although this isn’t massively suitable for little ones, it could come in handy if they ever have a stuffy nose or they get a bit older, and the smell helps them to sleep.

It runs at 25dB, and you can choose from seven colours with the multicoloured night light. The 360-degree adjustable mist outlet is also handy in case you want to target specific areas.

We think it is one of the best baby humidifiers around. It does the job and is under £100.


  • Dimensions: 27 x 24.5 x 36 cm
  • Air Type: Cool
  • Capacity: 2.5L

We like

  • Light effects
  • Holds a nice amount
  • Can be adjusted to target areas

We dislike

  • Dripping sound - overall quiet but this could be bothersome

Final Verdict

Not the best overall, but when buying with a baby in mind, you get everything you need

Vicks VH750 Warm Mist Humidifier

Able to release warm air which could relieve congestion and the other first signs of a cold or allergy, this humidifier could be the perfect answer to stuffy noses and sore throats.

The mist released is 95% bacteria-free, which will help if you are trying to keep everywhere clean. There are two intensity settings so you can give it a boost if need be, and it will shut off if it happens to run out of water.

If you need some oils to help you breathe, the VH750 is compatible with VapoPads scented pads which feature essential oils. One menthol pad is included with the purchase, and others are available to buy at a later day. If you’re buying for a baby, lavender pads are around instead.

To keep the 95% bacteria-free mist, there is a lot of cleaning to be done. It suggests this is all done daily, but the likelihood you’ll be able to fit this into your schedule is low. The unit dismantles easily when the time does come, but other reviewers have said that they left cleaning a bit too long and sticky residue formed.

It is suitable for rooms up to 35 m2, and we would say it is best for larger rooms as it does get quite noisy in operation.


  • Dimensions: 33 x 27 x 16cm
  • Air Type: Cool
  • Capacity: 3.8L

We like

  • On the quieter side
  • Can be used without the pads

We dislike

  • Keeping it clean is a bit of a nightmare
  • Cost of pads will be ongoing

Final Verdict

With the advancements in humidifier technology, this is no longer the best for keeping bacteria and allergens at bay. But it is certainly the best-priced model, and ideal if you just want something to bring out every so often for battling colds and illnesses

Philips AC3829/60

Able to purify your air as well as humidify, the Philips AC3829/60 lets you visualise the air so you can stay in full control of the conditions you want.

The purification technology can capture up to 99.97% of particles as small as 0.3 microns, including viruses, bacteria, pollen, dust and pet dander. NanoCloud technology then uses a hygienic process to release humidity into the air, so these allergens won’t just be replaced again as it will be clean air.

You can set it to keep an eye on things automatically. It will monitor the situation and turn on and off to keep on top of the situation. Just set the desired humidity to 40%, 50% or 60%, and it will turn itself off and on again to keep on top of it all.

The air visualisation app is brought to you via the Air Matters app, which Philips has partnered with to monitor indoor and outdoor air quality. It offers insights and one-week forecasts, so you know if you’ll be able to open your windows or how best to control the situation. You’ll also be able to see the filter status and control it all remotely.

There are four speeds in case you need to give it a boost, and the four casters on the base make it easy to move from room to room.


  • Dimensions: 80 x 49 x 39 cm
  • Air Type: Cold
  • Air Flow Rate: 310 m3/h

We like

  • 2-in-1
  • Great for allergies
  • Auto mode works well ticking away in the background
  • Can work in rooms up to 80 m²

We dislike

  • App can be a little slow to update and communicate

Final Verdict

Whether you want to have full control over the unit or want it to do all of the work itself, you can pick the correct mode, and your atmosphere will be perfect in minutes

Humidifier Buying Guide


Humidifiers usually come as either warm mist or cool mist forms. The former is great for anyone who needs aromatherapy treatment, needs to fight a cold or for use in the winter, as it is warm steam which is dispersed. The latter gives out room-temperature mist, which is best for anyone who needs a fresh atmosphere and the basic idea of the humidifier.

There are pros and cons of each:

Cool –

  • Often cheaper
  • Can tackle larger areas
  • More common so a greater choice
  • Slightly noisier than warm air units because of fan
  • Not great in winter months or for those with a cold/flu

Warm –

  • Mist evaporates quicker, adding humidity in a faster time
  • Often the most comfortable, especially in winter or small rooms
  • Don’t need cleaning as often – the temperatures can tackle bacteria
  • Could cause the room to feel stuffy
  • Some research suggests the temperature has no effect on people as it is the same temperature by the time it reaches airways


Some models can also diffuse oils along with the water, such as menthol or lavender, which will help make a nice scent in the room and can also help with breathing or sleeping.

You will have to look out for a model which accepts oils – not every model is suitable, and some will simply stop working if you use anything but water.

Room Size

Before you buy, measure the size of the room you’re going to want to use the appliance in. If it will be moved around, focus on the largest room it will be situated in.

Bear in mind that the advertised room sizes are often on the generous side. The more it has got to work on, the longer it will take to do the job, so try and give yourself a bit of leeway.


As with all appliances which deal with moisture, mould and bacterial growth can form on humidifiers. If they aren’t cleaned regularly, this could release particles into the air and make you ill, and the unit could stop working altogether.

Your unit should be easy to clean, with a removable water tank and a fan area which can be cleaned with disinfectant or vinegar/lemon. We have noted the ones which are tricky to clean, and anybody with allergies or who struggles with cleaning should avoid them.

Some Other Features To Look For In A Humidifier


Some humidifiers are self-monitoring, so they can sense how much moisture there is in the air. They will turn themselves on and off in response to keep the room at a consistent rate, so you don’t have to leave it too late to do this manually.

These are the most expensive units usually, so if you’d rather save a bit of money and not have this feature, you can buy a separate hygrometer.


How the timer works on a unit differs from model to model. You can either set them to turn on and off at certain times, so it can be on for when you get home from work or when you get up in the mornings. Or, others allow you to limit the amount of time it is on, so you can leave it on for just three hours as you sleep and it will allow you to drift off but not disturb you in the middle of the night.


There is a good chance you want your new appliance to be quiet, even if it won’t be used in the bedroom as you sleep. If you are bothered by loudness, then look for a model which wins top marks for running volume.


Why Do I Need A Humidifier?

Respiratory issues can often be alleviated with a boost of moisture in the air. If the atmosphere is too dry, it can cause a dry throat and eyes in response and make it hard to breathe.

This is even handier in the Winter months, or if you have a cold/flu. You’ll likely already know that steam can help you breathe easier, so a humidifier does the same job but on a grander scale. If your heating is on, it can dry the room out, so a humidifier balances it out again without affecting the temperature.

Research by Environmental Health in 2010 concluded that maintaining a humidity level between 40-60% can reduce the survival of viruses. This is important if you are suffering from a cold or flu, and are trying to keep it at bay for others in your home but also cure yourself.

Humidity can not just help you, but if you have a houseful of plants, or wooden flooring and wallpaper, dry conditions can leave them worse for wear.

What Is The Ideal Humidity For My Room?

Indoor humidity should be 30 to 50 percent. In winter months, where it is cold outside, and you have your heating cranked up full, this can dip to as low as 10%.

Finding that exact perfect point will depend on why you want to humidify the room, as well as personal preferences or issues such as dry skin.

Can I Use A Humidifier In The Bedroom?

Humidifiers can be used wherever they are needed, but there may be a few concerns if you want to use one here.

Look for a model which is quiet when running because you don’t want to be disturbed. Some also have lights, which could be great if you want a night light but not so great if you are sensitive to light as you sleep.

Appliance Reviewer