The air-Q and the CellActivator as examples of modern air purifiers
Test measurements

Air purification today: from classic filters to light air ion technology

Air purifiers are an effective solution for improving indoor air quality. In this article, we will introduce you to the different types of air purifiers - from classic filters to modern light air ion technology. Find out how these devices remove pollutants, allergens and contaminants from the air.

Author:

Lena Bremstahler

Date:

30.4.2025

The air we breathe every day is often invisibly polluted - be it by pollen, particulates, viruses, mold spores or chemical residues from furniture and cleaning agents. The air quality can deteriorate quickly, especially indoors, as windows are rarely left open permanently. This leads to concentration problems, poorer sleep and irritated airways.

The solution: air purification. But how exactly does it work - and what options are there?

What types of air purifiers are there?

Air purifiers can be divided into three main categories:

1. air purifier with filter system

These devices draw in the room air and pass it through various filters to remove pollutants

  • Pre-filter/coarse dust filter: Removes larger particles such as house dust, hair and pollen.

  • HEPA filter (High Efficiency Particulate Air): Filters the finest particles such as bacteria and viruses. Class H13 and H14 filters can remove up to 99.995 % of particles between 0.1 and 0.3 micrometers in size.

  • Activated carbon filters: Absorb gases, vapors and odors through their porous structure.

These filters must be replaced regularly to maintain their effectiveness.

2. air washer

Air washers purify the air by passing it through water. This binds particles and some gases in the water. They combine air purification with air humidification and are particularly useful in dry environments.

3. ionizers

Ionizers generate negatively charged ions that attach themselves to particles in the air. These charged particles combine to form larger clusters that can sink to the ground more easily or be collected by collection plates. However, some ionizers can produce ozone, which can be harmful to health. It is therefore important to choose devices that are ozone-free.

Our test box with the air-Q for measuring and the CellActivator

A new generation of air purification

A modern and harmless further development of classic ionizers is the so-called light air ion technology, which is already used in the products of various manufacturers - including the CellActivator.

According to the manufacturer, the CellActivator simulates the freshness of forests or seashores - an effect that goes beyond simply binding pollutants. It uses so-called light air ions, particularly fine, negatively charged ions which, according to the company, also occur in natural environments. These ions are said to bind to pollutants and allergens in the air and neutralize them effectively. At the same time, according to the manufacturer, the technology promotes oxygen uptake in the body and creates a noticeably clear, refreshing indoor climate.

Important: The CellActivator works completely ozone-free - and is therefore also suitable for use in sensitive areas such as bedrooms, children's rooms or offices.

This should not result in sterile laboratory air, but a noticeably pleasant, natural environment that is ideal for bedrooms or offices - or anywhere you spend a long time.

In our test, the CellActivator was tested using the air-Qin a room with an air volume of around one cubic meter. Despite the small size, there was a clear improvement in air quality, as the recorded measurement curves clearly show.

This diagram shows the air quality in our test box without the CellActivator
The diagram shows the air quality in our test box with the use of the CellActivator

What should you look out for when buying?

The following points should be considered when purchasing an air purifier.

  • Filter class: To remove viruses, experts recommend HEPA filters of class H13 or H14.

  • Ozone emission: Some ionizers can produce ozone, which is harmful to health. You should therefore ensure that the appliance is ozone-free.

  • Room size: The appliance should fit the room size to be effective.

  • Noise level: Quiet operation is important for use in bedrooms or offices.

  • Maintenance: Filters should be changed regularly to maintain efficiency.

Are air purifiers useful?

Air purifiers can improve indoor air quality, especially when.

  • regular ventilation is not possible.

  • people with allergies or respiratory diseases live in the household.

  • the air is polluted by pollen, particulates or other pollutants.

However, they are not a substitute for regular ventilation, but a supplementary measure.

Where is air purification particularly worthwhile?

An air purifier is versatile - and that makes it interesting for many areas of life.

  • Bedroom: For restful sleep through clear, fresh air.

  • Home office and workplaces: Against dry air, tiredness and poor concentration.

  • Children's room: For protection against allergens and pollutants.

  • Waiting rooms, surgeries, studios: for a hygienic and pleasant atmosphere.

  • Living spaces: To reduce odors, dust and pollutants.

  • Hotels, vacation apartments, yoga studios: For guests who value air quality.

Whether at home or in the commercial sector - good air makes all the difference.

Conclusion: Who needs air purification - and which one?

Anyone who wants to improve their indoor air - whether for health reasons, for better sleep or simply for a more pleasant living environment.

  • Filter devices are useful for allergies or high levels of fine dust pollution.

  • Ionizers are ideal for odourless, low-maintenance air purification.

  • And devices such as the CellActivator combine a feel-good climate with modern technology - for anyone who wants not just "clean" air, but living air.
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Summary

Why is air purification important at all?
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Our indoor air is often contaminated with invisible pollutants - e.g. pollen, particulates, viruses or chemical vapors. This can lead to sleep problems, concentration problems or irritated airways. Air purification can provide targeted support here.
What types of air purifiers are there?
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There are three main types: - Filter-based air purifiers (e.g. with HEPA and activated carbon filters). - Air washers, which clean the air with water and humidify it at the same time. - Ionizers, which work with electrically charged ions.
What should I look out for when buying an air purifier?
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- Filter class: For viruses at least HEPA H13 - Ozone-free: Particularly crucial for ionizers - Room size: Device must fit the room size - Noise level: Important for bedrooms or offices - Maintenance effort: Filter change or cleaning?
Are air purifiers also useful for regular ventilation?
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Yes, especially in poorly ventilated rooms or where there is a high level of pollution, they are a useful addition - but not a substitute for fresh air supply.
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