Last updated: August 16, 2021

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Whenever the temperature changes and the weather gets drier, the question arises: is it worth investing in an air humidifier or not? Increasingly popular, the device is becoming the darling of Brazilian homes.

Gaining the space that used to belong to vaporizers, humidifiers are a frequent subject at certain times of the year. Especially when the air humidity usually drops more than usual, causing those well-known discomforts and respiratory crises.

To alleviate the discomfort caused by dryness in the nostrils, air humidifiers are great allies. Its main function is to make the environment pleasant, through the evaporation of water. Are you interested? In this article you will learn about the best humidifiers on the market, their advantages and disadvantages and how they work.


  • Most of the current air humidifiers have ultrasonic technology and release a pleasant cold mist, responsible for humidifying the environment. The device does not heat up and does not offer the risk of causing burns, unlike the vaporizer.
  • The use of filtered water in the humidifier is very important as it helps to avoid possible contamination of the air by bacteria. Cleaning your humidifier is essential to guarantee your health and that of your family. Furthermore, it is recommended that you do not use the product too often. We will explain why later on!
  • Humidifiers usually offer an excellent cost-benefit ratio. They are practical, efficient, use little energy and have a long life span if they are cleaned properly and frequently.

The Best Air Humidifier: Our Picks

Buying Guide

The quality of the air interferes with our quality of life. Very dry air can cause uncomfortable breathing crises, even causing nosebleeds. Therefore, an air humidifier is essential in these situations.

If you want to know more about this device, which can transform the humidity of the air in your home, stay with us.

Imagem de umidificador de ar ligado e família ao fundo.

The air humidifier is essential to avoid discomfort in the nostrils. (Source: Yury Stroykin / 123RF)

What are the advantages and disadvantages of the air humidifier?

Air humidifiers have many advantages for those who suffer from dry weather and always have allergies. Nobody deserves to suffer inside their own home, right? That is why more and more families are using this product, which provides better air quality and brings several health benefits.

In an interview for the Unimed portal, pneumologist Flávio José Macdowell Costa explained that sudden changes in temperature can interfere with our respiratory system.

Since it's not possible to control the weather outside, at least you can change the quality of the air inside your home.

Air humidifiers prevent the aggravation of respiratory pathologies such as rhinitis and bronchitis and reduce the discomfort of climate changes. It is especially important for use by children and the elderly, who are the people most susceptible to suffering from respiratory problems.

An air humidifier is not usually expensive and can last a long time, offering great value for money to those who buy it.

Imagem de mulher lendo ao lado de umidificador de ar.

Air humidifiers can prevent respiratory diseases. (Source: Yury Stroykin / 123RF)

In addition, there are multifunction devices, which in addition to humidifier function as a fan, air conditioner, purifier and evaporator. For those who only want the function of humidifying the air, there are also super compact models, which are very discreet in the environment, and even the portable.

Among the disadvantages of the product, we can list the frequent need to change the water. This will ensure that your humidifier can always fulfill its role of improving air quality.

They are also unable to cool very hot environments. If you are looking for this function, choose a model that also comes with a fan.

  • Low energy consumption and great cost-benefit
  • Great option for open places where the air can circulate
  • Reduces the discomfort of climate changes
  • Relieves symptoms in allergic people
  • Light and compact devices
  • Some humidifier models offer other functions
  • Only some devices guarantee a warmer climate in winter
  • Does not cool very hot environments
  • Need to change water daily

What are the different types of air humidifiers?

Although the ultrasonic humidifier is the most common on the market, there are 3 main types of humidifiers. Before you choose which is the perfect type for you, learn what the difference between them is:

  • Ultrasonic humidifier: this type of humidifier works through a technology called ultrasonics. It consists of breaking down the water molecules by means of a vibratory process. The advantage of this model is that it is more accessible and easy to handle. You can control the relative humidity, automatic shut-off, among other features.
  • Impeller Air Humidifier: This humidifier works by means of a rotating disk that releases water into the diffuser. Passing through the diffuser, the water turns into drops that are released in the form of cold mist. Its main advantage is that this type of humidifier is cheap and easy to find, but it needs much more care when cleaning.
  • Evaporative humidifier: The air humidification process here is done through a paper, cloth wick or foam that sucks the water from the reservoir. This is a type of self regulating humidifier, because if the humidity increases, the amount of water decreases.

What care should I take when using an air humidifier?

Humidifiers should not be used to cool the environment and overuse can be harmful to your health. This happens because the device can generate over-humidification of the environment, making it more conducive to the proliferation of fungi.

In these cases, it is also interesting to acquire a thermo-hygrometer, which helps to measure the temperature and humidity of the place.

Specialists do not recommend that the product be used all night long for many nights in a row. Leaving your humidifier on for a long time may generate mould and mildew, which is as bad for respiratory health as dry air.

To avoid overusing your air humidifier, there are other alternatives. Hydrating your body, for example, is essential to ensure your health and a healthy respiratory system. Don't just rely on the humidifier. Use it as an ally in the quest for better health. This is the advice given by Clystenes Odyr Soares Silva, pneumologist at the Paulista School of Medicine, in an interview with G1.

It is also important that your air humidifier stays 1 to 2 meters away from you during use. In addition, the water compartment should be emptied when you are not using it. Standing water facilitates the accumulation of substances and the spread of micro-organisms.

These are some precautions that you should always take to ensure that your air humidifier is working in favor of your health:

  • Always place the humidifier on a firm, level surface;
  • Wash the tank with soap and water to avoid the proliferation of fungus;
  • Prefer to use your device during the day, as the environment is naturally more humid when there is no sun;
  • Do not place the appliance near heat sources or where there are explosive gases;
  • Never leave the steam outlet facing the wall, as this can lead to mould on the surface;
  • Never leave your device within the reach of small children;
  • Do not expose your humidifier to direct sunlight.

How much does it cost?

The smaller air humidifiers are usually cheaper. Although they are very efficient, they last a little less if they are left on daily and for long periods.

If you need to leave the humidifier working for more hours, it's interesting to invest in a higher quality device.

There are many options on the market. The hybrid devices (humidifier + air conditioner), for example, are usually a good choice for those looking for more than one function.

With the advantage of being two in one, some of them can even replace the need for an air conditioner.

Where to buy them?

You can find air humidifiers in large household appliance shops without much difficulty. As it's a product that's becoming increasingly popular, many shops are already selling humidifiers.

If you want to buy it in physical shops, you can find it in places like Extra, Carrefour, Ponto Frio, Casas Bahia, Magazine Luiza and other big shops. You will probably find a good model in the shop of your choice.

For those who like to buy products online, it is even easier to find the ideal option for your needs. At Lojas Americanas and Amazon, for example, there is a wide range of air humidifiers available.

Purchase Criteria: Factors to compare air humidifier models

As it is an appliance that can improve or worsen the health of you and your family, it is essential to choose the ideal model, which will suit your needs and ensure good air quality. These are some factors that should be taken into consideration before making the choice:

  • Reservoir size
  • Time of use
  • Ease of cleaning
  • Model

We will explain each of the topics and answer your questions about the air humidifier!

Size of the reservoir

Not always the size of the reservoir is directly linked to the duration time of the mist, but many times they can be related.

If you use the product with a lower frequency (recommended by experts) and have a small, poorly ventilated house, a humidifier with a capacity of 2 litres may be enough for you.

Imagem de umidificador de ar sobre mesa.

The size of the reservoir will depend on your purpose in using it. (Source: Yury Stroykin / 123RF)

If your humidifier is on for a long time (usually in regions that have drier air), a larger reservoir will probably be more useful for you. Choose models from 3 litres of capacity.

Duration time

Even though the size of the reservoir can help the running time, it is always necessary to check the characteristics of the product before buying it. Some humidifier models with a small reservoir size can last up to 20h.

If you usually leave the humidifier on for long periods of time, choose one that consumes less water. There are models on the market that last up to 120 hours uninterrupted if they are in economy mode!

If you use little, there is no need to choose a device with a long life span. Opt for models that last up to 10 hours, which will be enough for you.

Imagem de umidificador ligado.

Some humidifiers can last for many hours if they are in economy mode. (Source: draw05 / 123RF)

Ease of cleaning

Keeping your air humidifier clean at all times is essential to ensure it will do its job. Dirty humidifiers can cause even more respiratory problems than weather variations.

It is essential to empty the water tank frequently and wash it with soap and water. Therefore, always choose models that facilitate this cleaning.

Some humidifiers allow you to separate the water tank for washing. Others have a larger inlet, where you can put your arm to wipe it with a clean cloth. Give priority to models which make cleaning easier.


There are several types of humidifiers on the market. These are some of the types you may find:

  • Portable: They can be large wheeled or small. The first is called portable because they can easily be transported to any room in your home. However, they are more suitable for larger houses, because they take up a little more space. The small ones, on the other hand, can be found in several formats and sometimes even fit in your handbag. There are, nowadays, air humidifiers to be used even on the face during the day.
  • Hybrids: Hybrid air humidifiers have dual or multi function. In other words, they are for those who want to optimize space and buy a product that works for several purposes. Many hybrid humidifiers are also air conditioners and even fans! The advantage is that you pay one price to buy several products in one. The only downside is that they are usually large and a bit more expensive.
  • Compact: This model is simple and ideal for anywhere. The compact models only have the function of humidifying the air and you can leave them on top of some furniture while they do their work silently. This model is usually affordable and offers the advantage of fitting anywhere. In other words, they are great even for small flats.

(Featured photo source: Yury Stroykin / 123RF)

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