Top 5 Filterless Air Purifiers in 2022

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Filterless Air purifiers can be identified as cost-effective products in the market with a variety of selections. Despite their lack of popularity as a filtering category due to a number of factors, they have recently dominated the market.

From today’s Know Your Facts, let’s discuss what these filterless air purifiers are, how they differ from one another, and which ones are now available on the market at top of the list. Read and enjoy.

What are the Filterless Air Purifiers?

Filterless air purifiers are purifiers that work without the use of a filter. In contrast, they complete the purifying process by not trapping air pollution pathogens with a filter.

Due to the non-regular replacement of filters, these purifiers are ultimately more cost-effective than traditional ones. Without adequate maintenance, the majority of products in this category have a five-year lifespan with a 24/7 uptime.

There are numerous product categories on the market that are undergoing filterless purification.

  1. Air ionizers
  2. Ultraviolet light
  3. Electrostatic precipitators
  4. Photocatalytic oxidation
  5. Thermodynamic sterilization
  6. Ozone generators

As can be seen, the majority of them can be categorized as high-tech air purification processes, as opposed to just passing air through a filter.

In practice, however, these air purifiers cannot work as well as HEPA-filtered air purifiers. The majority of the time, manufacturers recommend these air purifiers for less contaminated environments.

Additionally, these air purifiers are rather hazardous because they may generate ozone during the air cleaning process.

In addition, filterless air purifiers are noted for their low electricity usage and quiet operation.

Filterless Air Purifier Categories

As mentioned earlier filterless purification process is categorized into several groups of air purifiers.

1. Air Ionizers

Ionization of the air is accomplished primarily by a process known as ion generation, which takes place between the electrode plates that make up an air purifier.

When these ions are released into the atmosphere or when airflow is being sent through the electrodes, air contaminants become ionized and are attracted to the oppositely charged walls, surfaces, or oppositely charged electrode plates inside the air purifier.

The vast majority of potentially harmful particles that contribute to air pollution can be extracted with relative ease using this method.

The more important question, however, is how well it works against the many kinds of infections that are found in the air.

2. Ultraviolet Light

UV light air purifiers are the most effective filterless air purifiers available on the market. This purifier focuses mostly on the living microorganisms in the atmosphere that cause a variety of diseases.

Using ultraviolet light, mostly eliminates pathogens, mold spores, and bacteria.
UV light, as employed in a UV air purifier, is designed to eliminate potentially infectious living, organic bacteria, and inorganic virus particles from the air.

Best UV Air Purifiers
Ultraviolet Light – C is often used in filterless air purifiers

When these pathogens are exposed to UV radiation, their DNA is destroyed, preventing them from reproducing. Most bacteria.

When a virus is exposed to UV light for a significant amount of time, it deactivates the DNA and RNA, preventing them from ever attacking organic cells.

This prevents viruses from invading living cells and maintaining their cycle by infecting them.

3. Electrostatic Precipitators

During this phase of the purification process, the e-stat force is utilized to collect dust and other particles that have an electrostatic charge and then precipitate them.

At first, all of the airflows pass through a high-voltage portion of the electrostatic field in order to electrically charge the particles.

After that, these potentially harmful organisms are passed through plates that are both positively and negatively charged.

All of the charged ion particles are attracted to the inner side of the plates, where they are collected by the electrostatic attraction force.

These particles that are stuck to the plates can be easily removed by shaking the plates or applying an external force.

4. Photocatalytic Oxidation

The process of turning harmful pollutants into water, carbon dioxide, and other debris is referred to as photocatalytic oxidation, abbreviated as PCO. Which is a typical technique that is utilized in the cleaning of air and the treatment of water.

In this process, ultraviolet light is primarily focused through titanium dioxide-coated filters or titanium oxide-coated filters, resulting in what is called a photocatalytic process. These filters and this process are both known as the photocatalysis process.

These ions and radicals are having a powerful reaction with the pathogens in the air, converting them into water or carbon dioxide, which are both harmless byproducts.

Even though the majority of air pollutants are converted into water and carbon dioxide, some air pollutants, such as fungus and bacteria, are destroyed by the high-energy photons produced by ultraviolet light.

5. Thermodynamic Sterilization

Thermodynamic sterilization, often known as TSS, is a method that employs the utilization of heat sterilization. In this method, a ceramic core containing micro capillaries is heated to a temperature of 200 degrees Celsius.

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Thermodynamic Sterilization removes microbiological particles in 99.99%

It is asserted that 99.9% of all microbiological particles, including bacteria, viruses, allergens from dust mites, and spores from mold and fungus, are eliminated.

This technology is used to remove airborne pathogens more effectively and higher efficiently.

6. Ozone Generators

Ozone air purification is the quickest, most successful, and most harmful method for purifying the air.
In the initial phase, this air purifier generates ozone by delivering oxygen through a high-energy spark.

These ozone molecules are highly unstable and directly eliminate airborne contaminants. As we will learn, they are used in hospitals, hotels, and even homes, but they are dangerous and must only be used by trained, competent people.

Attaching itself to bacteria, fungi, pathogens, smells, and other pollutants, ozone damages the cell wall at the molecular level. This procedure eliminates the pollutant and converts ozone to oxygen.

Pros and Cons of Filterless Air Purifiers

Filterless air purifiers are not suited for everyone. From person to person, requirement to requirement it may fluctuate. Here are the benefits and cons of filterless air purifiers to consider before choosing one.


  1. No regular filter replacements
  2. Low energy consumption
  3. Low time and maintenance cost
  4. Number of filterless purification options
  5. Low noise disturbances
  6. Suited for expansive room spaces


  1. Not efficient purification as HEPA filters purifiers
  2. Leads to respiratory health issues
  3. Not appropriate for highly contaminated areas
  4. Do not capture all the air pollutants

These advantages and disadvantages are discussed in comparison to filter air purifiers and filterless air purifiers.

Top 5 Filterless Air Purifiers

01. Airfree Iris 3000 Air Purifier

The Airfree Iris 3000 air purifier uses a thermodynamic sterilization method to eliminate mold spores, fungi, dust mites, germs, viruses, pollen, and pet dander from residential spaces.

Filterless Air Purifiers
Airfree Iris 3000 – Filterless Air Purifiers

Although it is a filterless air purifier, the Airfree Iris 3000 does not emit ozone, ions, or UV radiation that might cause respiratory system-related illnesses.

  1. Size –
    a. 8.5 x 8.5 x 10.4 inches
  2. Floor Area coverage –
    a. 650 sq.ft
  3. Noise –
    a. Free
  4. Filter –
    a. Thermodynamic sterilization (TTS)
  5. Safety –
    a. 26 % Ozone removal
    b. 99.99% micro-organism removal

02. Ion-Pacific ion box, Negative Ionizer

Ionpacific’s ion box air purifier utilizes ionic air technology, making it exceptionally effective in removing tobacco smoke and odor, pollen, harmful dust, pet odors, and pet dander.

Filterless Air Purifiers
Ion-Pacific ion box – Filterless Air Purifiers

This air purifier is fairly portable and can be used with a variety of different devices, including power banks and laptops, thanks to its 5V low voltage inlet.

  1. Size –
    a. 6.14 x 4.41 x 1.93 inches
  2. Floor Area coverage –
    a. 500 sq. ft ( 5-10 times fully clean)
  3. Power outlet –
    a. USB port
  4. Filter –
    a. Ionic Air

3. B-1000 Permanent Filter Ionic Air Purifier

This tower air purifier has a low budget and uses the least amount of electricity possible; it also removes odors from a big area with the assistance of an odor-removing carbon filter.

Filterless Air Purifiers
B-1000 Permanent Filter Ionic – Air Purifier Tower – Filterless Air Purifiers

Apart from that, the technologies of negative ions and UV-C radiation are responsible for the vast majority of air cleaning.

  1. Size-
    a. 5.5 x 6.5 x 17 inches
  2. Floor Coverage –
    a. 2000 sq.ft
  3. Noise –
    a. Whisper quiet
  4. Filter –
    a. Ionic Air
    b. UV -c light
    c. Carbon filter ( 6-12 months)
  5. Ozone for Heavy Duty Odor Elimination – Coverage Area / Ozone Output –
    a. 75 sq. ft. / < 0.05 ppm Meeting the Ozone Emissions Limit to be Used Safely Around Humans and Pets

4. Envion – Boneco Ionic Pro Platinum – Air Purifier Tower

This tower-shaped negative ion purifier just requires a little space to stand on, so it can simply be moved from one room to another without causing any more disruption.

Filterless Air Purifiers
Environ – Boneco Ionic Pro Platinum – Air Purifier Tower – Filterless Air Purifiers

On the other hand, it is highly effective at destroying most of the infectious agents that are the root cause of respiratory system-based illnesses, such as cold and flu viruses, mold spores, and bacteria that cause staph and strep.

The CA200 is ideal for use in home areas due to its low energy consumption and high efficiency in operation.

  1. Size –
    a. 7.56 x 6.46 x 25.7 inches
  2. Floor Area coverage –
    a. 500 sq.ft ( 3 times / 1 hour)
  3. Filter –
    a. Negative Ion

5. Clarifion – Air Ionizer

With ionization technology and low noise and low energy consumption features, this portable air purifier can be plug-in any small at a low budget price.

Filterless Air Purifiers
Clarifion – Filterless Air purifiers
  1. Size –
    a. 2.56 x 1.82 x 4.13 inches
  2. Filter –
    a. Negative ion Generator

Disclaimer: -These are Lassowond Recommendations for your information; please conduct research before making a decision.

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