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Air purifier and humidifier test: guide for a good indoor climate

Unpleasant smells, house dust and air that is too dry can be annoying and, in the worst case, even lead to health problems. This is exactly why Klarstein offers a large selection of different air purifiers and humidifiers to give you the opportunity to feel completely comfortable at home. In this guide, we'll explain how these devices work, their pros and cons, and how to make the perfect choice for you.

Air purifier: With filter and ioniser for the cleanest air

Klarstein air purifiers work with activated carbon filters and ionisers, among other things. The carbon filter reliably filters the air and ensures that unpleasant odours are removed. The ioniser charges the air with negative ions, which attract dust and odour particles and allow them to sink to the ground. An air purifier ensures that the air quality improves significantly, which can also affect your ability to concentrate, among other things.

Humidifier against dry air

Humidifiers can be a real game changer. Whether in summer due to air conditioning or in winter due to cold air: There are rooms that have too little humidity. Ideally, this should be 40-60%. Lower than that amount can be too dry, which can lead to watery eyes, dry skin, and a sore throat. Humidifiers, on the other hand, ensure a pleasant indoor climate either by misting, vaporising or evaporating water.

Tramontana 6-in-1 air purifier

Tramontana 6-in-1 Luftfilter

Product Review

Tramontana 6-in-1 air purifier

Stylish look and 6 functions: This small air purifier leaves nothing to be desired.

  • 6-in-1: Air purifier, air freshener ioniser, HEPA filter, activated carbon filter and UV sterilisation.
  • Compact design: Small in size with rounded design and easy operation
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The Tramontana ensures the most pleasant room climate in your home with various functions: In addition to activated carbon and HEPA filters, an aroma diffuser as well as UV sterilisation and ozone function ensure clean and pleasant air. The diffuser can be filled with essential oils to spread a pleasant scent. Harmful gases and viruses are captured by the filters and the built-in photocatalyst, and unpleasant odours are neutralized.


  • Many functions in one device
  • Compact and timeless design
  • Intuitive operation thanks to the LED display


  • Only suitable for small rooms up to 25 square metres

Vita Pure air purifier

Vita Pure Luftreiniger

Product Review

Vita Pure air purifier

The Vita Pure air purifier gives bad smells no chance.Simple design and effective air purification in one.

  • Effective air purification: With UV lamps, HEPA and activated carbon filter
  • Quiet: Quiet operation that is not disturbing
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Simple operation, an easily replaceable filter and an elegant, simple design: This is what characterises the Vita Pure air purifier. The air purification device works with a 3-in-1 filter system for clean room air: The activated carbon filter binds odour particles, the HEPA filter removes up to 99.97 percent of all fine particles from the air and the UV lamps effectively kill bacteria and other biological germs.


  • Self-explanatory operation
  • Easy to clean With built-in
  • timer


  • Without built-in diffuser

Skyscraper Horizon air cooler & humidifier

Skyscraper Horizon

Product Review

Skyscraper Horizon

Humidifier, fan and air cooler in one. The perfect device for dry air on hot days.

  • Elegant design: blends easily into the room
  • Multifunctional: Provides a cooling effect on hot days
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The Skyscraper Horizon is a real all-rounder. As an air humidifier, fan and air cooler, it ensures an optimal indoor climate on hot days. Thanks to the 3.5-litre tank, the air can be humidified and cooled at the same time. The device can be conveniently operated via remote control and touch control panel and leaves nothing to be desired.


  • Air cooler and humidifier in one
  • Fan with 45° oscillation
  • Easy to use


  • More suitable for summer
  • No air purification included

VapoAir Opal Smart Luftbefeuchter

VapoAir Opal Smart

Product Review

VapoAir Opal Smart 

Multifunctional air humidifier with diffuser as well as cooling and heating function.

  • Smart: Controllable via app
  • Elegant design: Futuristic and compact
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The VapoAir Opal Smart is probably the smartest room humidifier. It works with a high-quality ceramic filter and ioniser to professionally humidify the air and ensure an ideal indoor climate all year round. A selection can be made as to whether the water mist should be dispensed cold or warm. In addition, with the built-in diffuser, a pleasant fragrance of your choice can be released into the air. Whether, when and how long the VapoAir should run can be easily determined via the app.


  • Smart operation via app and on the device
  • High-quality ceramic filter
  • Including diffuser for a pleasant scent

Compare air purifiers and humidifiers

Tramontana 6-in-1 air purifier Vita Pure air purifier Skyscraper Horizon air cooler & humidifier VapoAir Opal Smart Luftbefeuchter
Device Type Air Purifier Air Purifier Air Cooler/Humidifier Humidifier
Filters Multiple filter system: HEPA filter + activated carbon filter + photocatalyst + ioniser + UV sterilisation + ozone Removable activated carbon filter cover + switchable ioniser - -
Water tank - - 3.5 litres 5 litres
Weight 4 kg 2.9 kg 7 kg 2.5 kg
Performance 36 watts 35 watts 60 watts 110 watts
Features - 3 adjustable ventilation levels: low - medium - high
- 3 adjustable operating modes: anion - ozone - anion + ozone - UV
- timer function
- adjustable intensity of air purification (low, middle, high)
- 2 built-in UV lamps - timer function
- timer function
- fan, air cooler, air humidifier and night mode device in one
- 3 operating modes: normal, natural and sleep mode
- remote control: range approx. 6 m
- controllable via the Klarstein app for Android or iOS
- heating function for warm
- plasma function: ioniser for binding odours and fine particles

Air purifier test: what should I consider when buying?

An air purifier is basically a device that can improve every living space. Whether when dealing with unpleasant smells, such as from smoking, food odours or the like, they quickly provide refreshment. Air purification offers even more advantages: A good room climate ensures better concentration, a more alert feeling and is simply pleasant. Room air purifiers are also very beneficial for allergy sufferers, as they filter particles such as pollen, dust and more from the air. When making a selection, the functionality is important, among other things: Does the device work with a HEPA and/or activated carbon filter? Does it have an ioniser and UV lamp? Is it important to you to be able to switch on a diffuser to spread a scent from essential oils? Another factor is the ease of use and how easy it is to swap out the filters. The performance and corresponding volume should also be considered, depending on use. Among other things, the size of the room in which you want to operate the device also plays a factor. Also, power consumption is something to inquire about.

Air humidifier test: what should I consider when buying?

You should first determine whether a room is too dry. If the humidity is between 40 and 60%, everything is fine. If the humidity is below that, a humidifier is a good idea. In the bedroom and in other rooms, humidifiers ensure pleasant air. If the air is too dry, the eyes, respiratory tract and skin can become irritated. There are different types of room humidification: misting, vaporisation and evaporation. When choosing, you should pay attention to the desired function. In addition, the room humidifier should be selected according to the size of the room. In a large room, a tank that is too small means that the tank needs to be constantly filled. Safety is also a big issue: The device should have an automatic switch-off function. Also important: Air that is too humid can also be harmful. The device should therefore be used in a controlled manner.


Air purifiers help you to create a pleasant indoor climate in your home without unpleasant odours. Air purifiers are often used in homes with smokers. But an air purifier can also help with pet odours, food smells or other unpleasant odours. Because air purifiers also remove dust from the air, they are very helpful for allergy sufferers. An air purifier can also help you with mould. It removes mould spores and the unpleasant odours that often accompany them.

Buying a humidifier and you don't know what to look out for? The primary advantage of humidifiers is that, as the name suggests, they humidify the air. After all, rooms that are too dry can irritate the skin, eyes and respiratory tract. In addition, moist air ensures a more pleasant and warmer room climate. If you have a lot of plants at home, humidifiers are a real highlight. In ideal humidity, plants can grow faster and healthier. Humidifying indoor air can also reduce indoor virus concentrations.

Air purifiers basically suck in air and use various filters and techniques to remove odour particles, mould spores, dust and other particles. The cleaned air is then returned to the room. There are also some air purification devices with a built-in fragrance diffuser. This provides a pleasant scent with essential oils. There are also air purifiers with water. They use the liquid as a natural filter.

Humidifiers release evaporated, misted or evaporated water into the room and thus ensure increased humidity in the room. This is especially important if the humidity in your room is below 40%. Humidifying the indoor air can provide a more comfortable and warmer indoor climate.

This is only possible if you do not regularly clean and maintain your humidifier. Dirt in the device or in the water used can be problematic. If you pay attention to drinking water quality and regular cleaning, humidifiers are not a breeding ground for fungal spores or bacteria.

Yes. An air purifier for the home can help not only with a house dust allergy, but also with hay fever and pollen allergies. This is because pollen can get into rooms and collect through doors and windows or on clothing. An air purifier ensures that these are captured or neutralised again. You should pay attention to fine filters of class H13 and H14. You should also use a HEPA filter and pre-filter.

No. If you use your humidifier sensibly and take care of it properly, it is not harmful. You should be careful not to over-humidify your room, as this can encourage mould and mite growth. You should also clean the device regularly.

Of course, this depends on the type and duration of use. Most devices consume between 20 and 40 watts. The power consumption can be calculated based on the kilowatt price and use.

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