What is the best water to use in humidifier?

best water to use in humidifier

Humidifiers assist us to cope with consistent dry skin during the cold season. They protect our skin from drying, and also ourselves from feeling unhealthy. Humid air is especially important for children, allergy sufferers, indoor plants, and even pets that do not endure dryness. Yet ordinary tap water is not constantly ideal for these gadgets. In this short article, we will discuss what is the best water to use in humidifier.

You can check the humidity level in the apartment using a hygrometer or a weather station. The normal level in cold weather is 30-45%, in summer – 50%. But for young children with weak immunity, it is recommended to maintain a level of 50-60% all year round.


Water becomes hard due to its high sodium and calcium content. It can contain:

Temporary, carbonate salts – those that, when heated, form a precipitate and leave the water;

Permanent, non-carbonate salts – they can hardly be removed from water due to boiling.

Water quality can be divided into five types:

1. Tap water – tap water purified only from toxic elements.

2. Distilled – additionally purified from impurities.

3. Demineralized – also purified from carbonate salts, that is, much softer.

4. Artesian – goes through even more stages of cleaning.

5. Natural spring water is the purest natural water that does not need filtration.


Let’s start with learning the types of humidifiers. They can be conventional, steam and ultrasonic.


These are the ones that evaporate water in the same way as it happens in a saucepan or kettle when boiling. Tap water is suitable for this type, provided that it is not too hard, there is not too much chlorine and other impurities in it. When heated, some of the harmful components will evaporate, but not all. From the use of such water on the heating element, a mineral build up is formed, like on the spirals of an electric kettle. If a plaque appears or you simply doubt the quality, it is better to pass the water through a filter.


They are more capricious, since evaporation here occurs naturally, without heating. Here water is poured into a cartridge with an antibacterial impregnation that protects against the growth of mold and microorganisms. If you fill them with tap water, the cartridges will quickly clog and have to be replaced frequently. Even pure water with impurities of salts and minerals can leave a sludge that clogs the filter screen. What kind of water is better to fill in a conventional humidifier? Correct answer: it is better to use distilled or demineralized water without impurities.

How to make distilled water at home?

To get distilled water at home, you can use regular tap water. Pour it into a saucepan, place a deep glass container on top and cover with a lid on top, turning it upside down and placing ice cubes on top. Heat the water, but do not bring it to a boil. It will evaporate and then drip from the lid handle into the bowl as condensation. Ice speeds up this process and condensation forms faster.


The most gentle type of humidifier. It uses ultrasonic vibrations to turn water into mist. With this method, all the smallest particles get into the air: including calcium, fluorine, and other impurities. We breathe in these particles with the air, as a result of which they accumulate in the lungs and on the mucous membranes. The consequences can be different – from swelling and irritation to a severe allergic reaction.

This is harmful to the device itself: impurities settle on the membrane. In some models, the membranes are so fragile that they cannot be cleaned and must be replaced.

What kind of water do you need to add to the ultrasonic humidifier? Good quality demineralized drinking water is suitable here. This is usually bottled water purified by reverse osmosis.

What Is the Best Water to Use in Humidifier?

Tap water is a big NO when it concerns a humidifier, according to the Environmental Protection Agency. Tap water is usually hard – it includes lots of dissolved minerals and salts. When this mineral-rich vapor is distributed as a mist, it might settle to create a cloud of great white dust around the space, especially in addition to furniture as well as over drapes. These calcium and magnesium deposits are a rich breeding place for bacteria.

white dust
White dust created on the surfaces due to bad quality water used in a humidifier

Further, hard tap water likewise creates a flaky accumulation inside the humidifier which aggravates the issue.

If you don’t clean the buildup frequently, bacteria, mold, and also mites can expand within. This leads to these pesky parasites attacking your entire house, triggering colds, allergic reactions, and significant health issues.

This is especially harmful to children and the elderly as well as might trigger allergies. Breathing in such microbes might create breathing illnesses.

The same holds true with unfiltered well water. Well water is mostly hard, and also may include bacteria. Well water from aquifers is rich in minerals, as well as needs to not be utilized in a humidifier without demineralization.

What type of water we can use in humidifiers except for tap water? You need water that’s without minerals, bacteria, and infections. Only distilled water meets every one of these requirements and is perfectly risk-free for humidifying the air. However, if you’re questioning other choices as well as their effect on your humidifier, below are all the details. Regardless of the device, the efficiency of the humidifier greatly relies on the water you make use of.

Distilled Water

This sort of water is the best for your humidifier. Distilled water is got from steam. Water is boiled to its steaming, and this steam is, upon cooling back to liquid, becomes distilled water.

What’s left? Minerals, bacteria, infections, and also other gross things. As a result of its purity, distilled water is typically used in labs, clinical tools, and so on. Thus, it makes sense to utilize it in your humidifier to get the purest type of moisture in your air, right?

Purified Water

This type of water is practically the same as distilled water, the difference lying only in the method it’s purified. The distilled water is steam-condensed, purified water goes through processes like reverse osmosis, ion exchange, and so on.

Can you utilize it in humidifiers, though? Given that it’s the exact same as distilled water and contains no minerals or pollutants, yes, it’s secure to use it for enhancing humidity levels.

What About Bottled Water?

bottled water in humidifier
Bottled water for humidifiers

You may use bottled water sometimes however it is not advised for long-lasting use.

Bottled spring water is mineral-rich, and triggers a range build-up over time. This indicates that bottled spring water, groundwater, and also mineral water need to not be used.

What About Reverse Osmosis Water?

Reverse osmosis (RO) water might be used sometimes, yet this depends upon the mineral content of your water.

RO water has fewer minerals than tap water, as larger particles are gotten rid of throughout the filtration process. However, it is still not as pure as distilled water as well as can not get rid of scale-forming minerals such as calcium. Consequently, you may make use of RO water often, but make sure to be even more persistent regarding cleaning your humidifier.

As a basic general rule, stay clear of making use of any type of mineral-rich water in your humidifier.

Can you use boiled water in a humidifier?

Using boiled water in your humidifier is not advised. While boiling water will eliminate bacteria and also infections, it does not remove dissolved minerals.

Actually, boiling water will raise the mineral content of the water. As steam vaporizes from boiling water, the mineral focus increases inside the pot of boiling water.

Although distilled water is made from boiling water, distilled water and also boiled water are 2 entirely various things. Distilled water is made from gathering the steam vapor from boiled water. Boiled water is not made from steam vapor, rather it is just heated as well as accumulated amongst itself.

One benefit of using boiled water over normal tap water is that it will certainly have a reduced opportunity of mold developing. Since boiling water reduces the effects of mold spores, you’ll have less trouble with mold as well as slime.

If you make a decision to use boiled water in your humidifier, be sure that it cools down prior to you utilizing it. Putting boiling water in a humidifier will certainly harm it. After boiling water, let it cool down to space temperature prior to placing it in your humidifier.

Should I use Hot Or Cold Water in a Humidifier?

Since we’ve ironed out what sort of water functions well for a humidifier, let’s speak about its temperature.

Expect you possess a pretty basic humidifier – no warm or cool mists. Should you add hot or cold water in it? The answer partly depends upon your preference.

Warm water can hold more moisture and generates a warm mist, which is usually handy for colds and also influenza. But also for some people, breathing in cozy air could be awkward. Moreover, warm water might possibly damage your device on the inside if it’s not developed to be a warm-mist humidifier.

Likewise, warm water gives way to mold and also bacteria expanding inside the storage tank, which will end up in the air around you. Yikes! On the other hand, utilizing cold water in a humidifier can reduce the air temperature and make it a lot more comfy for breathing.

Furthermore, it’s safer as pets as well as children will not be at threat of tripping over a humidifier full of steam and also burning themselves. Coldwater additionally consists of less dissolved minerals, unlike hot water, which is frequently really high in mineral content.

Hence, we recommend utilizing water that goes to space temperature levels for such humidifiers. Simply see to it that it’s either distilled or demineralized, and also you’re excellent to go.

How do you know if the water is of poor quality?

To understand that water is not suitable for your humidifier, it is enough to look at the tank and horizontal surfaces in the room. If a white or greenish coating quickly forms on them, then the water needs to be changed.

Before pouring a fresh portion of water, be sure to remove the remnants of the old one.

Other important signs:

  • The remaining water in the reservoir is darkened or cloudy.
  • An unpleasant odor is emitted from the tank, membrane or filter.
  • A greenish coating or mildew has appeared on the walls of the parts of the humidifier.


Humidifiers can be vital for anyone living in a dry environment. Nevertheless, top-quality humidifiers are commonly costly and also have high prices for repairs and service.

If not maintained, you’ll discover that your humidifier isn’t functioning as successfully anymore, and also in some cases, lime and also mineral deposits can stop the humidifier from working entirely.

With that said, you need to constantly keep your humidifiers using the right type of water in them as well as descaling when essential. If you occur to reside in an area where tap water has high mineral content, it’s far better to switch over to distilled or mineral-free water for your humidifier.

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