reverse osmosis vs distilled water for humidifier

Clover Dane

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Reverse Osmosis Vs Distilled Water For Humidifier

For humidifiers, it has options of usage of reverse osmosis as well as distilled water. The distilled water is completely free from minerals and the water is very pure. Reverse osmosis is also one substitute to use in a humidifier.  

Reverse Osmosis water use in humidifier

The reverse osmosis water produces pure water but if the water contains more dissolved solids then it will not remove all. This type of water with some dissolved solids that work as minerals are the suitable option for use in the humidifier. The reverse osmosis gives water with minerals deposits that is ideal for humidifier.

The reverse osmosis water is very aggressive. This water has a high percentage of quick reaction. The system quickly removes minerals from water. So, when reverse osmosis water uses in a humidifier, it immediately tries to react with those surfaces that contain minerals. The water from the humidifier reacts to surfaces like metal, stone, etc. 

You should follow one precaution when using reverse osmosis water for humidifiers. The humidifier exudes water so covers all those surfaces that have a risk of corrosion. The water from the humidifier tries to react with such surfaces quickly and affected them badly.

Distilled water prefer in humidifier

Distilled water is most suitable to use in a humidifier. The reason for using the distilled water is that this water is with almost zero impurities. The distilled water is also free from minerals that display in tap water. But the distilled water removes fewer minerals from the water as compared to reverse osmosis water.

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That is why distilled water is not very aggressive. When distilled water uses in a humidifier, it will never become the reason for any harmful effect on the surrounding things. Therefore, distilled water is the most perfect option to use in any humidifier.

Reverse Osmosis Vs Distilled Water For Humidifier

To conclusion

As we described, both reverse osmosis and distilled water can use for humidifiers. When you use reverse osmosis water for humidifier then you should use with precaution. Thus, it not creates any problem. Although, distilled water prefer for humidifier than reverse osmosis water.  

Should I use distilled water in a humidifier?

During colder months, the humidity often becomes too low, which is why homeowners resort to using humidifiers. Parents use humidifiers to help congested children breathe easier. Humidifiers have a good safety record, but should be used with distilled water. According to the FDA, humidifiers can release minerals from tap water into the air. The use of distilled water avoids this health risk.


Ultrasonic humidifiers and the impeller are often to blame for spraying minerals and micro-organisms from your reservoir into the air. According to the FDA, they have not declared this as a health hazard, but the use of distilled water and periodic cleaning of vaporizer tanks is recommended. Distilled water has very small amounts of minerals, but distillation removes enough minerals to make it much better for humidifiers and decrease mineral particles significantly.


In addition to the possible release of mineral particles, tap water leaves white scale scale deposits on the inside of the humidifier tank. These deposits provide a good surface for the microorganisms to flourish, and then they are drawn into the air. Some users have reported a white powder settling where the humidifier spray extends.


Two types of humidifiers produce the most mineral particles in the air. An ultrasonic humidifier uses ultrasonic vibrations to create a cool mist. The impeller type works by a rotating disk to spray a cool mist into the room. The humidifiers least likely to cause mineral dispersion are vaporizers, which heat the water to make a mist of steam. Evaporative humidifiers use a fan to blow air through a wet filter or other material. All types need regular cleaning to reduce microorganisms.


Cleaning reduces the risk of problems when using the humidifier. Empty the reservoir, dry it, clean the surfaces, and then fill with fresh distilled water daily. Use the manufacturer’s recommended disinfectant or a 3 percent hydrogen peroxide solution. Don’t let the water sit in the humidifier, and if you put it in storage, make sure all the parts are dry.

What kind of water to pour into the humidifier so as not to spoil it

Humidifiers are widely used because of their ease of use and their effectiveness in combating dry air. However, in order for the device to work efficiently, without showing unpleasant side effects, it is necessary to carefully monitor its condition. The correct water for the humidifier is essential for correct operation. What kind of water must be poured into the device so as not to jeopardize its performance?

Choosing water for the steam device

Steam humidifiers are considered the most unpretentious devices in relation to the water that is used during their operation. Since the end result of the action of such an evaporator is steam, which we inhale, the nature of the water component does not matter in principle.

An exception, perhaps, is the case when the tap water is of very poor quality. Then it is imperative to use filters to clean it. If this is not done, then the resulting sediment will negatively affect the operation of the device, which you turn on regularly, and it will quickly fail.

Using the right water in steam models will extend their life and improve performance.

Cold humidifiers

In such devices, the air is driven by a fan through a special cartridge with humidification, which helps to cool the air and saturate it with moisture. If you use regular tap water, the cartridge will quickly clog up and will have to be replaced. Therefore, the water must be carefully filtered, it is better if it is distilled. In the absence of such an opportunity, you need to purchase cartridges that reduce the hardness of the water component.

Water for ultrasonic models

Ultrasonic humidifiers are the finest of all types, but they are also the most advanced and efficient. The principle of operation of such devices is reduced to the conversion of electromagnetic frequencies into mechanical vibrations. Oscillations of the switched on device form waves of different pressure. As a result, even at the most ordinary temperature, the liquid begins to boil, while fine particles are thrown into the air. With the help of the air flow generated by the action of the fan, particles are carried around the room, creating steam.

The process, as you can see, is rather complicated, and therefore the requirements for the water involved in it are very high.

Water for such a humidifier must be demineralized and distilled. Otherwise, you will have to frequently change cartridges, and their price is very high.

If you are not ready to provide the device with water of the required quality, then it is better to refuse to purchase such a device in favor of another, more affordable service.

What is distilled water and how to make it yourself

Manufacturers of most models of air humidifiers recommend using distilled water during their operation. What is such water and how can you prepare it yourself?

Distilled water is water that is purified from various impurities, organic and inorganic origin.

The first group includes bacteria, viruses and various waste products of animals and plants, the second – various salts and mineral additives. You can get such a purified liquid through a certain technological process . This process boils down to three main stages:

  • preparation of ordinary water;
  • distilled production;
  • provision of storage conditions for the manufactured liquid.

At the first stage, it is important to give the prepared water time to settle. In about 2 hours, compounds of hydrogen sulfide and chlorine will be released into the atmosphere, and in 5-6 more heavy metals will “fall to the bottom”. Thus, the required time for settling water is approximately 6 hours . After that, you need to place a tube for expressing in the container, placing one end of it on the bottom, and through the other, express the lower third.

The production of distilled water at home occurs through evaporation. For this, fill the enamel container with prepared water by about half and plac on the stove. Place a grate from the oven in the water, and on it is a glass or porcelain plate, covered with a lid on top. It is advisable to choose a dome-shaped cover, placing it with the convex part down.

After the water boils, its evaporation begins, in order to speed up this process, you can put something ice on the lid – pieces of ice, for example. Water vapor, reaching the cold lid, turns into droplets of already purified water, which, flowing down the lid, fall into the glass container. Thus, after a certain period of time, collect a sufficient amount of distilled water.

Besides this option, distilled liquid can be obtained from … rain. After all, rainwater itself is already purified.

Of course, this method is suitable for those who live outside the city. It is worth remembering that you cannot collect the first drops of rain – they contain a lot of pollutants. The process itself boils down to the need to leave a sufficiently voluminous container in the rain for two days. As a rule, during this time all minerals have time to dissolve in water. The container must be perfectly clean.

The prepared water must be frozen in order to use it whenever necessary. To do this, take a suitable container, fill it with distilled liquid and put it in the freezer. The condition of the water should be checked periodically – it should not be completely frozen. Only ice is suitable for use, salts and chemicals accumulate in unfrozen water, it cannot be used. Ice is thawed and applied where needed. In our case – to fill the capacity of the humidifier.


We hope you have received enough information on what kind of water to fill in your chosen humidifier. If the recommendations are followed properly, the device will serve you for a long time and fully realize its functionality. Feel free to purchase humidifier options that you find difficult to maintain.

The more advanced and demanding to care for the model, the more efficiently it works.

Since humidification is directly related to your health and performance, you should not skimp on devices designed for this purpose.