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How to Choose an Air Humidifier

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Updated

The ideal humidity in flats should be between 40-65%. Too low values can cause various health problems. Dried mucous membranes are less able to trap viruses, bacteria and allergens. Low humidity also impairs living comfort. The solution may be a suitable humidifier, which contributes significantly to the quality of air indoors.

How to choose an air humidifier

Tips for Choosing an Air Humidifier

  1. Think about in which room you want your air humidifier

  2. Consider whether the humidifier will also work at night, hence the need for silent mode

  3. Humidification can be combined with air purification

Basic Parameters for Choosing a Humidifier

Humidification capacity (steam output)

Humidification capacity is given in millilitres or grams per hour. You should always choose a humidifier according to its output, with the higher output being more suitable for larger rooms. You should also consider higher capacity if you have leaky windows or extremely low humidity (below 30%). For rooms larger than 70 m2, it is advisable to consider using two humidifiers.

Noise level

Noise level values of a humidifier are particularly important during night operation if you are sleeping in the room that is being humidified. Water vapour Humidifiers are noisier than ultrasonic humidifiers, which are usually very quiet.

Power consumption

In the winter months, it may be necessary to run the humidifier 24 hours a day, in which case it is advisable to monitor the power consumption due to the overall financial demands of the operation. Hot steam humidifiers are more demanding in terms of power consumption, the power consumption of other types may have half the power consumption.

Water tank size

The size of the water tank affects the comfort of use. Manual humidifiers work until you turn them off or run out of water, so the size of the water tank should be taken into account. More powerful humidifiers may need a larger tank so that you don't have to constantly refill it. A larger water tank increases the size of the humidifier.

Built-in hygrometers

A practical feature of some humidifier models is a built-in hygrometer, which allows flexible reactions to the current humidity in the room. This avoids the opposite problem of humidity levels that are too high, which may promote mould growth.

Other extra features

When choosing a humidifier, look for other useful features:

  • Automatic shutdown – the humidifier switches itself off when it runs out of water.

  • Timer – Set specific times of humidification.

  • Humidity maintenance – It automatically regulates humidity levels.

  • 3 humidification intensity levels – It increases or decreases the humidification intensity as needed.

  • Aromatherapy – Using essential and scented oils, it fills the room with a pleasant scent.

  • Child safety lock – It provides protection against baby fingers.

  • LED display with current humidity indicator – It offers an immediate overview of the conditions in the room.

Hot Humidifier

Hot Humidifier

  • Suitable for family members who are often ill
  • It can raise the temperature in the room

Humidifiers produce warm sterile steam. They first bring the water to a boil, then cool it and release the vapours into the air. This process can destroy any bacteria, but you have to take into account the higher power consumption.

Advantages and disadvantages
  • Sterile steam can kill bacteria
  • No consumables required (no changing of filters or humidifying pads)
  • More effective and powerful
  • Higher power consumption
  • Hot steam at the outlet of the humidifier, caution is needed in case of proximity to children
Studený zvlhčovač

Cold humidifier

  • Ideal for year-round use

Cold humidifiers work with the natural evaporation of air known from nature. The water droplets are captured by a special filter and then blown by a fan into the air, which gets effectively humidified.

Advantages and disadvantages
  • They offer quiet operation, suitable for bedrooms
  • Lower power consumption (usually up to 30 W)
  • Not suitable for allergy sufferers, they do not eliminate allergens
  • It is necessary to change the humidifying pads (about every 3 months)
Ultrasonic humidifiers

Ultrasonic humidifier

  • Universal use

Humidifiers use the principle of ultrasound to turn water into a vapour mist. The basis is a high-frequency ultrasound oscillator, which forms microdroplets that create fine steam. What you will appreciate about ultrasonic humidifiers is their low power consumption and quiet operation.

Advantages and disadvantages
  • No minerals released into the air, so no white mineral dust settles down on surfaces
  • Lower power consumption
  • Demineralisation filters need to be changed
NanoCloud humidifier

NanoCloud humidifier


  • NanoCloud technology provides triple protection against bacteria and mould
  • Evenly distributes humidified air
  • Hygienic and safe 

With special triple protection, NanoCloud technology can prevent the spread of mould and effectively destroy up to 99% of bacteria compared to other ultrasonic models, making a significant contribution to indoor air quality. The absorption filter first traps dust and large particles such as hair or pet hair while absorbing dry air. The evaporation system then hygienically humidifies the air, which is evenly distributed in the room in the form of healthy air.

Advantages and disadvantages
  • Hygiene safety certificate
  • There is no spread of white dust
  • No wet stains
  • Effectively kills bacteria and mould
  •  Occasional filter change required

Frequently Asked Questions When Choosing a Humidifier

Where to place the humidifier?

The humidifier should be aimed at the centre of the room and placed on the floor. Never place the humidifier near moisture-sensitive objects such as paintings. It is also not suitable for it to be placed on a shelf or wooden floor. In this case, we recommend using a waterproof (moisture-proof) mat.

How often and for how long should I run the humidifier for maximum effect?

The operating time depends on the size of the room, humidity and other parameters. In the winter months, when the humidity in the flat is very low, it may be necessary to run the humidifier 24 hours a day. The more expensive models feature automatic shutoff based on the hygrometer, so they only run when needed. The effect is also influenced by ventilation, which should be limited when the humidifier is running.

What extra features can humidifiers offer?

The humidifier can come equipped with an integrated hygrometer, a thermometer and the option to regulate the performance and therefore the level of humidity. Superior features include the combination of a humidifier and an air purifier (HEPA filters, carbon filters, ionisation), as well as an aroma diffuser. The presence of a remote control is also an advantage.

What kind of water should go in a humidifier?

As a rule, manufacturers do not make any claims about the quality of the water used. However, water with a low mineral content, ideally distilled, is generally recommended. In case of high water hardness, it is advisable to soften the water. If you do not use the humidifier for more than two days, always pour out any remaining water to prevent the growth of bacteria.

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