Air purifier or ionizer: what's the difference?
An air ionizer is an air purifier that works using negative ions. The term “air purifier” includes all devices designed to purify the air, and air ionizers are one of these categories.
The confusion between the two is often due to filter-based purifiers, which are the most common type of air purifiers, but which are only one category among all types of air purifiers, and not the sole representative.
If you would like to learn more about all the different technologies used to purify the air, we have written a comprehensive guide: “Air purifier: which one to choose? – Complete guide”.
And to clearly show you the difference between filter-based air purifiers and air ionizers, here are a few explanations.
Table of contents
- What is the main difference between a filter-based air purifier and an air ionizer?
- Advantages and disadvantages: filter-based air purifier vs air ionizer
- The best of both worlds: the air purifier without disposable filters
- Additional information: What should you know before choosing a filter-based air purifier or an air ionizer?
What is the main difference between a filter-based air purifier and an air ionizer?
The main difference lies in how they address the issue of air quality:
A filter-based air purifier uses what is known as “filter media trapping.” This means that electric models operate with a fan that draws in air so the filter can capture all elements present in the air, from dust to fine particles, depending on the filter’s pore size. The air released by the purifier is therefore clean, as it no longer contains these elements.
An air ionizer uses a natural phenomenon: negative ions. The ionizer emits them into the air, and these ions charge fine particles, pollutants, and other harmful particles present in the air, causing them to be attracted to larger surfaces, such as the floor. The air therefore becomes clean, as these particles are removed from the air we breathe.
Advantages and disadvantages: filter-based air purifier vs air ionizer
| Criterion | Filter-based air purifier | Air ionizer |
|---|---|---|
| Energy consumption | A filter-based air purifier consumes more energy than an air ionizer, as it has a built-in fan required for operation. | An air ionizer consumes very little energy (less than a light bulb) and can therefore operate 24/7. |
| Maintenance | Most air purifiers are equipped with a HEPA filter. These are effective, but airflow is very sensitive to clogging. It is important to regularly clean the pre-filter and regularly replace the HEPA filter. Alternatively, TEQOYA offers a cleanable filter-based air purifier, thanks to its e-filtration technology (presented below). | An air ionizer requires almost no maintenance related directly to the device; it simply needs to be cleaned every 6 to 12 months. However, due to how it works, harmful particles are attracted to the floor, walls, and furniture. In highly polluted environments, this can accumulate and become visible. This remains invisible in the vast majority of cases, and these residues never have time to build up if the room is cleaned regularly. |
| Efficiency | A filter-based air purifier is effective, and the fan allows it to cover a large volume of air. However, attention must be paid to maintenance: the dirtier the filters, the more the airflow decreases, which proportionally reduces the volume of air treated. | An air ionizer is extremely effective but covers a smaller area, which depends on the devices, as a sufficient density of negative ions must be present in the air. |
| Noise | The fan of a filter-based air purifier creates background noise, more or less similar to that of a refrigerator at medium speeds. | An ionizer is completely silent (<0 dB). |
In summary, a filter-based air purifier consumes more energy, requires more maintenance, and is noisier, but can cover larger areas than an ionizer. An air ionizer consumes very little energy, requires almost no maintenance, and makes no noise; however, it covers a smaller area, depending on the model.
The best of both worlds: the air purifier without disposable filters
If you need the capacity of a filter-based air purifier, for example for a living room, kitchen, or dining room, but do not want to regularly buy and replace disposable filters, a good alternative is an air purifier without a HEPA filter:
It operates with an electric fan, like traditional filter-based air purifiers. However, it uses negative ions to attract and filter harmful particles, along with a washable filter to further increase filtration efficiency.
We designed the E500 in response to customer demand. In the past, TEQOYA mainly manufactured air ionizers for private individuals: to equip a bedroom, an office, or a living room, so they could breathe clean air without additional background noise or filters to replace. At the same time, we supply filters for building ventilation systems. For example, we equipped the athletes’ village during the Paris 2024 Olympic Games, as well as hospitals, hotels, and more.
So, we combined the two: an air purifier that uses negative ions, coupled with ventilation, to purify the air in larger spaces or rooms with high activity levels: kitchens, living rooms, meeting rooms, locker rooms, etc. If you would like to learn more, here is the presentation of the E500.
Additional information: What should you know before choosing a filter-based air purifier or an air ionizer?
There are three important points to consider when choosing an air purifier:
Ozone emissions
Poor-quality ionizers may emit ozone, a gas that is harmful to the respiratory system. These emissions must be clearly stated by the manufacturer.
TEQOYA products are guaranteed to be ozone-free.
Odors
An air purifier may emit odors related to ventilation, for example if the filter is not properly cleaned.
TEQOYA products are used in professional kitchens, restaurants, and many public venues.
Device longevity
A fan tends to become obsolete more quickly than an ionizer, due to the type and frequency of use, which cause gradual wear on the fan.
In all cases, there is also a risk when choosing an unscrupulous manufacturer that practices what is known as planned obsolescence: meaning the air purifier is designed to be replaced after a defined period.
TEQOYA products feature an eco-responsible design: they are built to last. Some of our ionizers are guaranteed for 10 years and last even longer.
Information on air quality and news from TEQOYA
How does an air ionizer work?
#Essential
Natural environments are rich in negative ions. This is precisely the principle on which the air ionizer is based on. However, do you know how this technology manages to capture the pollution particles contained in the indoor air to purify your home?
Are air purifiers effective against viruses, especially the coronavirus COVID-19
#Virus and microorganismes #L'essentiel
In December 2019, a respiratory virus of the Coronavirus family appeared in the Wuhan region of China and has now spread to all continents.
What is eco-responsibility?
#Essential
Purifying indoor air while protecting your health and the planet is possible! Say goodbye to filters and make way for negative ions: choose an eco-responsible air purifier that will easily reduce energy and resource consumption.
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