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The Best Filterless Air Purifiers

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The Best Filterless Air Purifiers

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Technology Thermodynamic Sterilization
Size 8.4 x 8.4 x 10.4
Room Coverage 650 sq. ft.
Weight 3.3 lbs.
Noise Level Silent
Electricity Consumption 51 W

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Technology Thermodynamic Sterilization
Size 5.1 x 5.1 x 12
Room Coverage 180 sq. ft.
Weight 1.5 lbs
Noise Level Silent
Electricity Consumption 33 W

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Technology Ionization
Size 7.5 x 7.5 x 23
Room Coverage 540 sq. ft.
Filter 5.9 lbs.
Noise Level 21 dB
Electricity Consumption 5 W

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Technology Ionization
Size 7.5 x 28.5 x 9.5
Room Coverage 500 sq. ft.
Weight 7.8 lbs
Noise Level Silent
Electricity Consumption N/A

Overview


In this day and age, clean air has become more of a luxury than a basic necessity. With air pollution becoming increasingly prevalent everywhere, it’s becoming harder and harder to get clean air even at home! You want to feel safe in your living space knowing that you are away from the countless contaminants that plague the air outside, but unfortunately such conditions are not guaranteed. Recent studies have shown that indoor air consistently has higher concentrations of pollutants – in the form of pollen, dust mites, mold spores, and secondhand smoke – than outdoor air.

The good news is that you are not alone in this battle against indoor air pollution: air purifiers are here to save the day! Air purifiers were developed to specifically address the problem of indoor air pollution by taking in polluted air and releasing clean air back out. Air purifiers come in all sizes and types to meet a variety of needs. Most air purifiers use a series of filters to remove airborne pollutants, but filterless air purifiers are also available for those who are looking to avoid the hassle that comes with cleaning and maintaining air filters.

In this article, we will be exploring the 5 best filterless air purifiers that you can buy to protect your family from the harmful effects of indoor air pollution.

HOW FILTERLESS AIR PURIFIERS WORK

Before we get into this list, it’s important to understand how filterless air purifiers work so that it’s easier to determine which air purifier is best suited for you. Filterless air purifiers rely upon the following technologies: electrostatic precipitation, ozone, photocatalytic oxidation, ultraviolet light, ionization, and thermodynamic sterilization. The most popular models, however, work through either ionization or thermodynamic sterilization:

  • Ionization

Air purifiers that use ionizers to clean the air work by generating electrons or protons to charge air pollutants which are usually neutral so that they either have a negative or positive charge. Once charged, they become attracted to surfaces or other pollutants with the opposite charge. As they stick to each other, they become too heavy to remain airborne and settle in the air purifier, effectively cleaning the air.

  • Thermodynamic Sterilization

Air purifiers that use thermodynamic sterilization allow air to pass through temperatures as high as 400 °F to eliminate up to 99.9% of biological air pollutants like bacteria, viruses, dust mite allergens, mold spores, and fungi. It is important to note, though, that air purifiers using this technology do not trap or remove airborne particles.

Now that we’re acquainted with the types of filterless air purifiers, it’s time to discuss what characteristics we’re looking for in a high quality air purifier.

First off, room coverage will always be one of the most important things to consider. An air purifier placed in a room that is larger than the prescribed room coverage will not be able to do its job effectively. As a rule of thumb, you’ll want to purchase an air purifier that is able to cover a larger area than the room that you’re planning to use it in.

Aside from room coverage, you’ll also want to look at energy consumption and noise output, especially if you’re planning on using the air purifier 24/7. Optional features and functions also vary for each air purifier and it would ultimately be up to you to determine which of these would be the most useful to you.

Unfortunately, unlike with air purifiers that use filters, most filterless air purifiers are not given Clean Air Delivery Rate (CADR) ratings. Note that CADR is a numerical value that represents the capacity of a filter to remove air pollutants in the air. Since filterless air purifiers don’t have filters, they cannot be assigned a CADR rating. This may be a disadvantage for filterless air purifiers since there are no standards that tell us how well they will perform.

With that said, let’s get into the list of the 5 best filterless air purifiers:

The Airfree Onix 3000 is a filterless air purifier that uses thermodynamic sterilization to completely eliminate almost 100% of mold, dust mites, pollen, bacteria, viruses, smoke, and other organic pollutants. This compact, lightweight air purifier is able to quietly and effectively clean the air in large spaces up to 650 sq. ft. in size.

Pros

  • Completely silent
  • Large room coverage
  • Does not produce ozone, reduces ozone levels
  • Lightweight and compact
  • Attractive design

Cons

  • Unit becomes warm while in use
  • Not good for removing certain chemicals, odors, and dust
  • Works slowly

Features

  • Patented environmentally friendly technology
  • Night light
  • Automatic Shut-Off
  • Safety Light Indicator
  • 2-year Warranty

The Airfree Onix 3000 is one of the most popular filterless air purifiers available today. Priced just under $300, this air purifier makes use of Airfree’s patented, environmentally-friendly thermodynamic sterilization technology to eliminate almost 100% of all airborne pollutants by completely destroying them using extremely high temperature of up to 400 °F.

What’s great about the Onix 3000 is that it’s very small and lightweight, allowing you to place it anywhere at home without worrying about it being obtrusive or noticeable. But don’t let its small size fool you: this bad boy is able to clear areas up to 650 sq. ft. in size, without releasing any harmful substances or ozone. It does, however, release a considerable amount of heat while being used. This is usually nothing to worry about, but you might want to place it farther away from couches or beds as it does become quite warm. In addition, since the Onix 3000 relies on convection to bring in polluted air, it may take some time for you to notice any difference in air quality.

Because the Onix 3000 doesn’t use any filters or fans, it works silently and does not produce any distracting sounds. Unfortunately, due to the lack of filters, the Onix 3000 doesn’t do a good job of removing dust, hairs, chemicals, and odors. All things considered, the Onix 3000 is definitely a force to be reckoned with. It’s not too expensive, provides a large room coverage, it’s extremely quiet, looks great, and does its job very well. What more can you ask for? 

The Airfree T800 is an affordable thermodynamic air purifier capable of cleaning the air in 180 sq. ft. of space. Using Airfree’s patented thermodynamic sterilization technology, it is able to quietly remove common household air pollutants like pollen, mold, bacteria, and viruses. Its small and lightweight design makes it easier to place anywhere around the house.

Pros

  • Completely silent
  • Does not produce ozone, reduces ozone levels
  • Very lightweight
  • Affordable
  • Energy efficient

Cons

  • Small room coverage
  • Not good for removing certain chemicals, odors, and dust
  • Works slowly
  • Has a noticeable plastic smell at first use

Features

  • Patented environmentally friendly technology
  • Plug & play
  • 2-year Warranty

As far as thermodynamic air purifiers go, the Airfree T800 is definitely the perfect budget option without compromising quality. It’s like the Onix 3000’s smaller, lighter, and cheaper cousin that nevertheless rivals the Onix 3000 for effectiveness. Despite the significantly smaller room coverage of only 180 sq. ft., the T800 still has the same Airfree patented, environmentally-friendly thermodynamic sterilization technology that is also capable of totally eliminating almost 100% of allergens, mold, fungi, bacteria, and viruses. It weighs half the weight of the Onix 3000 and costs less than half the price as well.

Its sleek, slim design allows it to be used in most home settings without being too noticeable. Like the Onix 3000, the T800 is also completely silent while it’s running but produces a small amount of heat as well. Users of the T800 have also reported a noticeable smell when they first used the T800. This smell completely disappears after a few hours, though, and is nothing to worry about.

Since they use the same technology, the T800 also has the same drawbacks as the Onix 3000. It has difficulty dealing with particulate matter like dust, hair, chemicals, and some odors and also takes its time cleaning the air. However, it’s also able to considerably reduce ozone levels which is a very desirable trait. It is quite energy efficient and easy to use. Overall, the T800 is a great option if you’re only looking to clean the air in small places and don’t want to spend too much on a very powerful unit.

The LifeAir IonFlow Evolution is one of the latest in ionic air purifiers, with a slim design that allows it to be placed anywhere at home. It generates millions of negative ions to remove up to 99.94% of airborne pollutants quietly and efficiently. It is able to cover large spaces of up to 540 sq. ft. effortlessly.

Pros

  • Attractive design
  • Quiet
  • Large room coverage
  • Easy to clean
  • Very energy efficient
  • Does not produce ozone
  • Long warranty

Cons

  • Very expensive

Features

  • 19 million negative ions per cm3
  • Zero ozone emission
  • Ambient blue light (optional)
  • 10-year Warranty

The LifeAir IonFlow Evolution is one of latest models in ionic air purifiers. It is designed to be small enough to placed on desktops and shelves but strong enough to cover large areas up to 540 sq. ft. in size. Not only it is very powerful, it looks great as well.

By releasing up to 19 million negative ions per cm3, the LifeAir Evolution is capable of capturing up to 99.94% of airborne particles as small as 0.007 microns. This means it is able to remove smaller particles that even True HEPA filters miss. It combats an array of air pollutants such as smoke, mold, pet dander, fine dust, bacteria, and viruses to create a safer environment for you and your family.

Considering the sheer volume of negative ions it is able to produce, the LifeAir Evolution produces nearly undetectable levels of ozone and is the most energy efficient air purifier in this list. It’s worth mentioning, too, that this air purifier is covered by a long 10-year warranty from LifeAir.

The big downside of the LifeAir Evolution is its retail price: at just under $400, this ionic air purifier is more expensive than many air purifiers with a lot more features and a lot more coverage. However, it’s undeniable that the LifeAir Evolution is the complete package of looks, efficiency, ease of use, and power. 

The Envion Ionic Pro Turbo is an affordable ionic air purifier capable of removing up to 99.9% of pollen, mold, odors, bacteria, and viruses at home. It works very quickly and quietly, able to clean the air in spaces up to 500 sq. ft. in size.

Pros

  • Affordable
  • Easy to clean
  • Quiet
  • Works quickly
  • Energy efficient
  • Large room coverage

Cons

  • Releases small amounts of ozone and ozone smell
  • Short warranty

Features

  • High negative ion concentration
  • 3 Speeds
  • 1-year Warranty

The Envion Ionic Pro Turbo is capable of removing up to 99.9% of airborne pollutants like pollen, mold, odor, dust mites, bacteria, and viruses in a space of up to 500 sq. ft. It’s easy to clean and care for without the hassle of regular filter replacements. The Turbo has 3 speeds to choose from but, regardless of the speed, it works very quietly unlike air purifiers that use filters which tend to be quite loud. It works fairly quickly too, being able to generate cleaner air in less than an hour. In addition, it’s also very energy efficient and although the actual wattage isn’t disclosed, it apparently “consumes less energy than a compact fluorescent bulb.” Its sleek and slim design also allows it to blend in with any type of home decor without being too noticeable.

Unfortunately, unlike the LifeAir Evolution, the Turbo does release a little more ozone and produces a noticeable ozone smell which has been reported by a lot of users. It also has the shortest warranty among all the air purifiers on this list which might trouble some potential buyers. Despite this, however, the Turbo is definitely a good choice for anyone who doesn’t want to pay too much for an air purifier. Although not as cheap as the T800, it’s still relatively cheap in the long run, especially considering that it doesn’t require any filter replacements. It’s slim, discreet, covers a large area, and does its job quickly, making it perfect for round-the-clock air purifying needs.

FINAL THOUGHTS

Filterless air purifiers are great for people who want cleaner air at home but don’t want the burden of having to replace or clean filters regularly. They’re generally quieter and low maintenance compared to their filtered counterparts but may be a little more expensive upfront.

If you’re looking to avoid filterless air purifiers that may be a little expensive upfront, then the Airfree T800 would be your best bet. It’s not too expensive and is just as effective at removing airborne pollutants. Keep in mind that the T800 was designed for smaller spaces. It’s best to place it in a small room so that it remains efficient.

If the Airfree T800 doesn’t appeal to you or you don’t like the fact that it gets a little warm while in use, you can definitely go for the Envion Ionic Pro Turbo. It’s a little bit more expensive but not by a lot and is just effective while covering more than twice the space that the T800 can.

On the other hand, the LifeAir IonFlow Evolution is definitely our top pick if price isn’t an issue. It covers a large space while being able to remove even the smallest particles to ensure that nothing gets away. It’s easy to use, easy to clean, quiet, and looks great.

The air purifier that really hits all the right spots, however, and creates the perfect balance of design, power, and functionality is the Airfree Onix 3000. The mid-priced Onix 3000 is capable of covering a large area and is able to remove a wide array of air pollutants at almost 100% efficiency. It’s completely silent and looks great while it does its job effortlessly.