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10 Best Rated Filterless Air Purifiers – In-Depth Reviews


Models Considered


Hours of Research


Experts Interviewed


Consumer Reviews Analyzed

K eeping clean air at home should be a top priority for every homeowner who is interested in having a welcoming and healthy living environment. In this matter, an air purifier is the best ally as it tends to impurity removal from the air to help you breathe easy and maintain good health. But there are many variants of air purification systems out there, and if you seek one that isn’t only effective in its performance but that is cheap to maintain, the filterless air purifier is what we recommend because, as the name suggests, there are no actual filters to replace with it. If you are curious to learn more about this intriguing device and take an in-depth look at what the market has best to offer, check out the following reviews.

If you live in an area where air moisture levels are low and air purity is an issue for you indoors, an air purifier and humidifier combo unit is a better-suited option since it solves both issues at once.

Top 10 Filterless Air Purifiers Compared

Photo Product Area Coverage Filtration Rate Ozone Emissions Noise Level Power Draw Warranty Price

Best Overall

1. Airocide APS-300

500 sq. ft. 100% 0 PPM 41 dB 60W 2 years Check Price at Amazon

Best for Allergies

2. Airfree Onix 3000

650 sq. ft. 99.99% 0 PPM 0 dB 52W 2 years Check Price at Amazon

Best for Dust

3. Airfree Lotus

650 sq. ft. 99.9% 0 PPM 0 dB 52W 2 years Check Price at Amazon

Best for the Money

4. Envion Ionic Pro Turbo TA500

500 sq. ft. 99.9% 0.05 PPM 40 dB 12W 1 year Check Price at Amazon

Editor’s Choice

5. Air Oasis 1000 G3

300 sq. ft. 99% 0.05 PPM 30 dB 15W Lifetime Check Price at Amazon

6. Airfree P1000

450 sq. ft. 99.99% 0 PPM 0 dB 45W 2 years Check Price at Amazon

7. Airfree Tulip

450 sq. ft. 99.9% 0 PPM 0 dB 44W 2 years Check Price at Amazon

8. Airfree T800

180 sq. ft. 99.9% 0 PPM 10 dB 42W 2 years Check Price at Amazon

9. GermGuardian GG1000

100 sq. ft. 99.97% 0 PPM 45 dB 6W 1 year Check Price at Amazon

10. Clarifion Negative Ion Generator

150 sq. ft. 99% 0.05 PPM N/A 1W Satisfaction guarantee Check Price at Amazon

1. Airocide APS-300

Check Price at Amazon

  • Room coverage: 500 square feet
  • Technology: PCO catalyst
  • Air purification efficiency: 100%
  • Air changes per hour: 1
  • Ozone emissions: 0 PPM
  • Noise level: 41 dB
  • Power draw: 60 watts
  • Dimensions: 6” x 18.7” x 6.9”
  • Warranty: 2 years

With the same flagship design that Aerocide has accustomed its loyal customers with from the release of the predecessors of the APS-300, this specific model takes that design one step further through the superior performance it flaunts. It might be a bit spicy priced, there’s no hiding it, but considering the NASA-developed technology that sits behind the product and its overall efficiency in air quality improvement, it’s surely worth every cent.

Want to see for yourself just how much of a difference the APS-300 makes when it comes to air purity improvement? Then use an air quality monitor to see the before and after, getting the chance to compare stats and see how efficient the air purifier actually is at air pollution reduction.

PCO Technology
  • The APS-300 uses a PCO catalyst to destroy even ultra-fine particles that linger in the air indoors.
  • Its efficiency rate when it comes to pollutant reduction is 100%, this filter-free unit having no issue when it comes to eliminating impurities that include mold, bacteria, and VOCs, to name a few.
  • It takes approximately 20 minutes since you run the unit for it to make a difference in terms of air quality improvement.
Performance & Features
  • Does not produce any ozone emissions while it operates – 100% safe for use, even in the baby room.
  • Can be used in spaces up to 500 square feet large – rely on this beast to even clear the attic or basement air of impurities.
  • Aside from ridding the air of bacteria, dust, VOCs, and more, it even clears out unpleasant odors, leaving your home smelling fresher than ever.
  • Rated at 60 watts, so you don’t have to worry that running it 24/7 might amp the bills too much.
  • When used in an area with its peak coverage, it produces a single air change per hour.
  • Features 3 operating modes – low, high, and automatic. In automatic, the light-sensor adjusts the running speed according to the time of day so that the unit won’t pose a distraction.
  • The LED indicators let you know when the reaction chamber needs to be replaced (this is usually once every 15 months), if it is not installed correctly, or if there is an issue with the unit.
  • Modern design makes it perfect for any room in your home, even for the office.
  • Measures 6.9 inches by 18.7 inches by 6 inches – does not take up a lot of space.
  • Weighs only 9 pounds – move it from room to room without much effort.
Other Important Details

You inevitably have to take into account how much noise the unit makes since you will likely run it when you’re around. If you plan on using it in the bedroom or nursery, this aspect is all the more important. With the Airocide, you can rest assured knowing that it doesn’t pose much of a distraction while it tends to air purification since it produces only 41 decibels – you will sleep soundly next to it. We also like that the warranty is 2 years long since this exceeds the standard. Within this period, repairs are handled free of charge by the producing company.

  • Airflow direction comes from the top and the bottom grilles
  • Takes only 20 minutes for it to make a significant difference in air purity
  • Does not produce harmful emissions while it runs
  • The changeable reaction chamber has a lifespan of 15 months



Using a NASA-developed PCO catalyst to rid the air of all health-threatening pollutants, including bacteria and VOCs, the APS-300 sits at top of the chain when it comes to filter-free air purification. If you care for your general wellness and have the money for it, this product is the best you could opt for.

2. Airfree Onix 3000

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  • Room coverage: 650 square feet
  • Technology: Thermodynamic TSS
  • Air purification efficiency: 99.99%
  • Air changes per hour: 1
  • Ozone emissions: 0 PPM
  • Noise level: 8 dB
  • Electricity consumption: 55 watts
  • Dimensions: 8.4” x 8.4” x 10”
  • Warranty: 2 years

It can be used in rooms up to 650 sq. ft. and it’s generally purchased for bedrooms because it’s very small and has an adjustable nightlight at the top. It’s based on a simple method that provides maximum results in eliminating odors, mold, dust mites, smoke, bacteria, and other allergens in the air. It’s warranted to operate free of defects for 2 years after the purchase date and any malfunction will be handled by the manufacturer.

Smart and Innovative

The TSS technology heats the air inside to 400°F to kill even the most resistant microorganisms. The purified air is cooled before being released, so it’s safe to keep around children. The lack of ions, ozone, or UV light makes it a trusting option to purify your nursery or bedroom. Some of its features are:

  • Powerful – It moves air through a process of air convection at a rate of 14 m3/hr
  • Continuous Operation – It’s completely silent as it only produces a noise of 30 dB
  • Safe – It doesn’t emit ozone or ions
Highly Efficient

It’s recommended for sensitive people who might feel uncomfortable around devices that emit byproducts or that use filters that retain impurities. Since it doesn’t use any filters or complicated procedures, maintenance is not something you should worry about. Some of its particularities are:

  • Automatic – Since it’s extremely safe, it has an auto-shutoff protection
  • Indicator Light – Lets you know whether it is operating or not
  • Capable – Designed for large spaces that measure up to 650 sq. ft.

This model is so energy-efficient that it consumes as many watts as a small light bulb. It does not require maintenance or filters, so you don’t have to worry about additional costs. It moves air through natural air convection, just like hot air balloons function. The air intake happens at the bottom and the outflow at the top.

  • Efficient at destroying germs and bacteria – sterilizes the air
  • Portable design makes it easy to relocate whenever needed
  • Vast area coverage of 650 square feet – use it in any room or space you want
  • Perfect for the nursery or bedroom since it only produces 8 decibels



Compact and with a design that makes it just perfect for the nightstand next to your bed, the Onix 3000 is your source of fresh, clean air. It doesn’t produce harmful byproducts when it runs, and you can count on it to keep quiet throughout the whole night and not bother you since it only makes 8 dB.

3. Airfree Lotus

Check Price at Amazon

  • Room coverage: 650 square feet
  • Technology: Thermodynamic TSS
  • Air purification efficiency: 99.9%
  • Air changes per hour: 1
  • Ozone emissions: 0 PPM
  • Noise level: 0 dB
  • Electricity consumption: 52 watts
  • Dimensions: 7.7” x 7.7” x 13”
  • Warranty: 2 years

Recommended for rooms up to 650 sq. ft., it silently removes and destroys organic odors, pet dander, bacteria, dust mites, mold, and organic allergens. The exclusive technology integrated ensures that it requires minimal maintenance. The distinctive design combined with advanced technology will allow you to place it anywhere you wish in your home. Watch as the petals open up and the color changes, resembling a lotus flower.

Thermodynamic TSSTM Technology

This technology uses heat which is similar to boiling water temperatures to destroy 100% of all micro-organisms. Inside, the temperatures can reach up to 400 degrees Fahrenheit. Hence, all viruses, bacteria, mold spores, or contaminants that are affecting the immune system will be destroyed. Its features are:

  • Safe – Does not emit ozone, UV light, or ions
  • Independently Tested – To prove its efficiency, it has been independently tested in 6 different countries, including Sweden, Germany, and the USA
  • Colors – Choose whether you want the colors to be a fancy or harmonic night light

All of the laboratories are ISO 17025 certified, which means that the results can be trusted. In addition to this, it proves that the product can remove all of the micro-organisms regardless of how small they are.

Safe Use

As it has an energy-efficient operation, you don’t have to worry about seeing considerable differences in your electricity bill. Moreover, as it will only use heat to clean the air, you don’t have to worry about the negative effects it may have long term.

It’s important to mention that even though it can reach an incredibly high temperature, the air will be cooled down before it’s returned to the room. Hence, it’s safe to use around children and pets.

  • Completely silent – sleep with it in the same room
  • 10 adjustable nightlight colors for a soothing sleep
  • TTS technology is highly efficient at microorganism destruction
  • Cools the sterilized air before releasing it to not affect the indoor temperature

  • Difficult to disassemble for thorough cleaning
  • Among the costlier products available


Another Airfree product that you are bound to appreciate for its high air pollutant removal rate of 99.9%, the Lotus might be powerful but it doesn’t take up much space, which is a plus. Best of all, its completely silent operation makes it perfect for the nursery or bedroom.

4. Envion Ionic Pro Turbo TA500

Check Price at Amazon

  • Room coverage: 500 square feet
  • Technology: Oxygen Plus
  • Air purification efficiency: 99.9%
  • Air changes per hour: N/A
  • Ozone emissions: 0.05 PPM
  • Noise level: 40 dB
  • Power draw: 12 watts
  • Dimensions: 9.2” x 10.6” x 29.3”
  • Warranty: 1 year

Envion is a brand that customers who have previously owned air purifiers are likely already accustomed to. The TA500 is yet another example of excellence on the company’s part since it clears the air of impurities at the fraction of the cost other products do. It even draws an insignificant amount of power when it runs (12 watts) to ensure the bills won’t get amped too much by its presence. We must also highlight the small footprint since it makes the unit perfect for any space in your home or office – it measures only 9.2 inches by 10.6 inches by 29.3 inches.

High Purification Capacity
  • Count on it to make a big difference for the better when it comes to air quality since it is rated at 99.9% air purification efficiency.
  • Its high efficiency is granted by the Oxygen Plus technology it utilizes that transforms ozone and smog into pure oxygen.
  • The peak threshold when it comes to coverage is 500 square feet, which is more than enough for any area in your home, and even for office use.
  • It is CARB certified since it produces ozone within safe parameters, only 0.05 parts per million, to be specific.
Nifty Features
  • Automatically turns off if functional issues are detected to prevent incidents and damage. This makes it safe for you to leave it on even when you’re away from home.
  • It automatically turns on at the highest speed setting so that it tackles impurity reduction ASAP.
  • Speaking of, there are 3 settings that you can pick from – low, medium, and high. On the lowest setting, it produces only 40 decibels.
  • The germicidal chamber it is fitted with tackles the efficient and rapid destruction of germs and bacteria to sterilize the air you breathe.
Quality Guarantee

Aside from the fact that backing from defects is granted for 1 year, which is pretty standard for this niche, there’s another aspect that puts your mind at peace when it comes to the product’s quality. That is the fact that it’s an Envion model, evidently. The company is quite renowned for the performance and durability of the air purification systems it releases, as well as the approachable price it sells its products for.

  • Effective at reducing airborne germs
  • Oxygen Plus technology turns ozone and smog into pure oxygen
  • Automatic safety shut-off – leave it on even when you’re not home
  • CARB certified for safe ozone emissions

  • It takes a while to see significant air quality changes after you turn it on
  • The small housing openings make it difficult to clean the unit’s exterior properly


The two tasks at which the Envion Ionic scores highest are reducing indoor odors and destroying germs. Thus, with this fairly priced unit in your home, the air will feel fresher and your allergies are bound to not act up as much.

5. Air Oasis 1000 G3

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  • Room coverage: 300 square feet
  • Technology: AHCPO, Bi-polar ionization
  • Air purification efficiency: 99%
  • Air changes per hour: 1
  • Ozone emissions: 0.05 PPM
  • Noise level: 30 dB
  • Electricity consumption: 15 watts
  • Dimensions: 4” x 4” x 14.13”
  • Warranty: Lifetime

Among the top choices of customers is the G3 model coming from Air Oasis that can handle rooms as large as 300 square feet. It’s a tower purifier made of aluminum and polymers that bring a classy touch to your home. The manufacturer offers a generous lifetime warranty for this highly efficient system. The sole maintenance task that is required for you to perform with time is to replace the AHCPO cell every 3 years or so (the system notifies you when the exact time comes).


It uses two innovative technologies, namely a photo-catalytic UV lamp that kills carbon-based particles, and a Bi-Polar ionization technology that releases ions to eliminate impurities from the air. Additional characteristics are:

  • Its operating relies on an Advanced Hydration Photo Catalytic Oxidation(AHCPO) that basically neutralizes carbon-based particles and uses hydro-peroxides to disinfect the air
  • It’s more energy-efficient than other similar items due to the photo-catalytic operation that doesn’t involve large fans to force the air through thick filters
  • Flaunts a one-button control that makes it intuitive to use
  • Removes up to 99% of aeroallergens, VOCs, odors, and microorganisms

It measures 4” x 4” x 14.13” and it only weighs 6 pounds. This means that you can take it with you wherever you go. Its ozone output is 0.05 parts per million which means that it’s not harmful to our health. The positive to negative ion concentration is 20,000,000 cm3.

The greatest thing about it is that it doesn’t affect your energy bill regardless of how often you use it. This is because it only uses 15 watts. If you use it daily for 4 hours continuously, it won’t cost more than a coffee at Starbucks. Furthermore, it is made from anodized brushed aluminum and polymers. Thus, it will last for many years to come.

  • The germicidal UV-C light handles destroying microorganisms
  • Reduces VOCs and allergens to trace levels, creating a safer indoor environment
  • Energy-efficient since it only draws 15 watts
  • Lifetime quality assurance

  • It’s not the most efficient solution for odor reduction
  • The sharp edges of the unit might be problematic for households with kids or pets


Using ionization and AHPCO technology, the Air Oasis breaks down pollutants to make the air indoors safe to breathe even for asthma sufferers. It might not be the best option for getting rid of foul smells, but this won’t be an issue if you didn’t intend to use it in a room like the kitchen anyway.

6. Airfree P1000

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  • Room coverage: 450 square feet
  • Technology: Thermodynamic TSS
  • Air purification efficiency: 99.99%
  • Air changes per hour: 1
  • Ozone emissions: 0 PPM
  • Noise level: 0 dB
  • Electricity consumption: 45 watts
  • Dimensions: 8.4” x 8.4” x 10.4”
  • Warranty: 2 years

It has been tested in 6 different countries and it has been proven to kill any type of microorganism that passes through it, regardless of how small it is. The inside temperature will reach 400 degrees Fahrenheit. Moreover, you don’t have to worry about your safety as the air is cooled before it comes out.

Designed With Innovative Features
  • Thermodynamic TSS Technology – It uses the same concept as boiling water; it uses heat to kill microorganisms that are lingering in the air
  • Filterless Technology – You don’t have to invest further as it doesn’t require replacement of parts or filters
  • Ozone-free – It operates without emitting ozone. There will be no traces of ozone, ions, or UV light. It has been noted that it reduces ozone in the air by 26%.
Easy Maintenance

It does its job without requiring thorough maintenance on your behalf. You will be pleased to know that it has a whisper-quiet operation, which means that you won’t be distracted while it runs. It also has a low energy consumption so that you can keep it functioning throughout the day and night. This model is suitable for rooms that measure up to 450 sq. ft.

  • Does not produce any noise when it runs
  • Safe even for the nursery since it doesn’t emit ozone
  • The soothing blue nightlight will help you fall asleep faster
  • Compact unit – perfect for the nightstand

  • Tends to get warm to the touch after a few hours of use
  • Doesn’t fare well when tackling tobacco smoke removal


Using the reliable thermodynamic TSS technology, the P1000 kills microorganisms and eliminates other airborne particles to create a safer habitat. It’s suited for fairly large spaces since the peak coverage of the unit is 450 square feet, and it doesn’t emit ozone when it runs.

7. Airfree Tulip

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  • Room coverage: 450 square feet
  • Technology: Thermodynamic TSS
  • Air purification efficiency: 99.9%
  • Air changes per hour: 1
  • Ozone emissions: 0 PPM
  • Noise level: 0 dB
  • Electricity consumption: 44 watts
  • Dimensions: 5.7” x 5.7” x 13.3”
  • Warranty: 2 years

It can clean a room of up to 450 sq. ft. Due to the filterless technology, you don’t have to worry about paying extra for maintenance. Furthermore, it has a travel-friendly design that allows you to enjoy fresh and clean air wherever you go around the world.


This is another model that will get rid of contaminants so you can breathe air that isn’t polluted. Additionally, it will remove the harmful ozone levels indoors. Other contamination issues it fixes include pet dander, pollen, dust mites, and bacteria, mold spores, chemical vapors, and viruses.

If you want to get rid of cooking smells fast, this product gives a helping hand, making your home smell better. Moreover, as it can remove viruses and bacteria, you can use it during the flu season to protect yourself and those you love.

Completely Silent

It is completely silent when it runs so that you can even sleep in the same room without it presenting a distraction. The slim design means that it will fit with any décor. Some of its design features are:

  • Nightlight – Choose between the large range of lights that you can turn off as well
  • Independently Tested– To prove its efficiency, this model has been tested by ISO laboratories
  • Auto Shut-off – In case it overheats when operating, it will automatically shut itself off to prevent potential hazards

If you’re looking for a model that will bring minimal attention to itself, this is a great choice. Furthermore, if you’re someone with a busy schedule, you will thoroughly enjoy it as it doesn’t require any maintenance.

  • Perfect for the allergy and cold seasons
  • Built-in nightlight with 10 color selections for a soothing sleep
  • Noise-free operation recommends it for the nursery and bedroom
  • Low power draw – runs it as much as you want without spending a fortune

  • Reports of an odd odor coming from it for the first few days of use
  • Airflow is fairly poor for the price


A beautifully shaped unit that doesn’t only look good but fares well when it comes to making your home a safer environment since it removes allergens and bacteria from the air, the Tulip is an option you ought to consider ASAP if you want a value deal that works.

8. Airfree T800

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  • Room coverage: 180 square feet
  • Technology: Thermodynamic TSS
  • Air purification efficiency: 99.9%
  • Air changes per hour: 3
  • Ozone emissions: 0 PPM
  • Noise level: 10 dB
  • Electricity consumption: 42 watts
  • Dimensions: 5.1” x 5.1” x 12”
  • Warranty: 2 years

It is recommended for use in rooms of 180 sq. ft., so it’s a more compact and light-duty purifier. It’s smaller in size for easy portability and it can be placed on a shelf without worrying it will fall. This model can remove mold spores, dust, pet dander, and pollen. Moreover, it’s compact and lightweight.


This product has been independently tested in real-life working conditions, which means that it has proved its efficiency. Every micro-organism that passes through the patented system will be captured. Some of its features are:

  • No Ozone – You can rest assured about your safety because it doesn’t emit dangerous emissions like ions, ozone, and UV lights
  • Whisper-quiet – The operation won’t make any loud noises; feel free to operate it throughout the night
  • Energy-efficient – Low power draw, which means that you don’t have to worry about the energy bill going up
Design and Specifications

It measures 5.1” x 5.1” x 12″ and it weighs 1.5 lbs. This means that you can take it with you wherever you go. It comes with a 2-year warranty that spares you of repair costs. Additionally, it has a consumption of 33 watts, which makes it cost-effective and viable for all-day use.

Smart and Innovative

It can kill allergens, impurities, mold, pet dander, dust, household odors, and bacteria with ease, leaving the air cool and clean. It can draw around 14,000 liters of air daily and it instantly sterilizes it by heating it to 400°F. Some of the particularities are:

  • Sterilized Air – You can keep it working in scorching hot air since the sterilized air will be cooled before being returned to the environment
  • Removes Micro-organisms – You will enjoy the fact that you will be protected from the flu and cold since it kills microorganisms
  • High Capacity – Can clean a room that measures 180 sq. ft.

No residues are left behind, so it can be used even by the most sensitive individuals. Since it doesn’t rely on a filter, it’s easier to maintain and it will not involve further costs. It’s covered by the same 2-year warranty like the other Airfree products. What’s worthy to mention is the fact that it removes the need for extra costs as the product lacks filters.

  • Rated at 42 watts only, so it’s not expensive to run
  • Weighs only 1.5 pounds – easy to relocate
  • Zero ozone emissions – no dangerous byproducts produced while it runs
  • The unique design makes it perfectly complement any décor

  • Does not feature a nightlight
  • Doesn’t cover very large spaces – 180 square feet tops


Airfree doesn’t need an introduction by this point, and the T800 is another product worth looking into if you want to spend your money wisely. If the area you plan on using it in isn’t very large, then this is your go-to since it doesn’t cost much and has a high air purification rate of 99.9%.

9. GermGuardian GG1000

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  • Room coverage: 100 square feet
  • Technology: UV-C light
  • Air purification efficiency: 99.97%
  • Air changes per hour: N/A
  • Ozone emissions: 0 PPM
  • Noise level: 45 dB
  • Power draw: 6 watts
  • Dimensions: 4” x 3” x 7.5”
  • Warranty: 1 year

Don’t let the small size of this GermGuardian model fool you – it’s a lot more impressive than it seems. Sure, it is indeed suited for smaller areas (up to 100 square feet, to be specific), but this isn’t an issue if you are looking for an air purification device for the bathroom, nursery, kitchen, or closet.

What makes it even more appealing is the cheap price – it can be yours for significantly less than $50! Needless to say, the asking price combined with the low upkeep costs (you only have to replace the UV-C light every 10-12 months) make it one of the best budget picks at the moment.

  • Measures 4 inches by 3 inches by 7.5 inches, and you plug it directly into the wall socket. You can even rotate it to fit the space appropriately.
  • Since it weighs only 0.7 pounds, the last thing you have to worry about is portability since it aces this chapter.

It’s quite powerful although it is small-sized. What makes it so proficient in terms of air purification stands in the UV-C light technology at its core – it will reduce odors, VOCs, and even destroy bacteria, mold spores, and viruses.

  • When it comes to the odors that it tackles, these range from cooking fumes to tobacco smoke, so it’s a reliable solution for kitchen use.
  • Just turn it on, and you won’t have the whole room, yourself included, smelling like the delicious food that you’re cooking.
  • It fares well even when it comes to freshening up the room your pets sit in.
  • Significant odor improvement when used in the proximity of the diaper pail.
  • High efficiency rate in terms of indoor air pollution reduction – rated at 99.97%.
  • Does not produce any ozone emissions, so it’s safe to use in the bedroom or nursery.
1-Year Assurance

Since it’s one of the cheaper solutions for odor and pollution reduction, it is a bit of a surprise to see that backing is provided for 1 year. If there are any defects within this period, the manufacturer handles fixing them free of charge.

  • Specialized in reducing odors and destroying mold and germs
  • Plug it into a wall socket and let it do its magic
  • Backed by a 1-year warranty
  • Comes at a cheap, affordable price

  • Small space coverage
  • It’s a bit loud for its size


Perfect for the small spaces in your home like closets or the bathroom, the GermGuardian is a cheap yet reliable air purification system. Count on it to reduce odors and reduce air pollution, but don’t expect miracles if you’re an allergy sufferer – it doesn’t pack the needed power to solve all of your issues.

10. Clarifion Negative Ion Generator

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  • Room coverage: 150 square feet
  • Technology: Negative ions
  • Air purification efficiency: 99%
  • Air changes per hour: N/A
  • Ozone emissions: 0.05 PPM
  • Noise level: N/A
  • Power draw: 1 watt
  • Dimensions: 2.6” x 1.8” x 4.1”
  • Warranty: Satisfaction guarantee

As long as you don’t need vast coverage, the Clarifion is the option you ought to consider, especially seeing how it comes at a cheap price. In its operation, it removes a range of air quality decreasing factors, including dust, smog, smoke, pet dander, bacteria, and allergens.

Perfect for Small Spaces
  • It has a peak area coverage of 150 square feet, which makes it perfect for single-room use.
  • This product is recommended for bedrooms, corridors, living rooms, and other similar-size areas.
  • It doesn’t occupy a lot of space either – measures 2.6 inches by 1.8 inches by 4.1 inches.
High Negative Ions Release
  • Produces up to 10 million negative ions per cubic cm per second, which is more than sufficient for the area coverage it handles.
  • Tackles all airborne pollutants, regardless of their size – effectively cleans the air.
  • Makes a positive difference when it comes to indoor odors.
  • Produces only 0.05 PPM, so its ozone emissions are within safe parameters.
Easy to Install and Use
  • Just plug the device in an outlet, and it starts doing its magic in terms of clearing indoor air pollution.
  • Doesn’t need anything in terms of upkeep except that you wipe its exterior clean when dust settles on it.
Other Highlights

It draws only 1 watt when it runs, so you can leave it on unremittingly and it won’t cost you much at all. Although it does make a bothersome mechanical noise at times, its overall operation is fairly silent. Woefully, we can’t say much about the warranty of this product, just that it comes with the standard 30-day return policy.

However, the overall positive feedback from customers makes it a trustworthy product. Just don’t expect it to last for decades since the estimated lifespan of this unit stands at around 3 years (considering the cheap price, however, this isn’t a huge issue).

  • Perfect for a bedroom or small office – 150 sq. ft. coverage
  • Up to 10 million negative ions per cubic cm per second output
  • A cheap acquisition that is affordable for a wide range of customers
  • Ozone emissions within safe parameters

  • Makes an annoying mechanical noise at times
  • Low life expectancy estimated at approximately 3 years


A small and cheaply priced product that does what it promises with a high efficiency rate of 99% air pollutant removal, the Clarifion is recommended for spaces up to 150 square feet. Needless to say, there’s no maintenance involved with it, and seeing how it’s a plug-and-play product, using it is as intuitive as it gets.

Filter Vs. Filterless Air Purifier

Every time you encounter a different and more intriguing device, it’s natural to be skeptical until you learn more about it. If filter purifiers never made you question their efficiency because you were familiar with their operation, things could get tricky with filterless models. To help you make up your mind between the two, let’s draw a quick comparison.


In terms of efficiency, the two types provide similar results, so you won’t regret choosing any of the two. While one uses a filter to capture air impurities, the other is based on physics to reach the same purpose. However, HEPA systems are more effective in eliminating a wider range of impurities, which is where their vaster popularity spans from. Moreover, they are more suitable for people with allergies as they target dust mites and manage to retain more particles.


For some customers, maintenance is the most important aspect to look into as they don’t want to waste much time or money on catering to the system’s needs. This is where filter-free models reign as they only require occasional cleaning via vacuuming or using a damp cloth, whereas classic systems need their filters replaced routinely, aside from requiring cleaning as well.


By far, the smartest option cost-wise is the filterless system as, upfront, it doesn’t differ much in terms of pricing (some models are even cheaper than their classic counterparts), and it doesn’t require any investment down the road as there are no filter media to replace.

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Allergy Triggers

To relieve yourself from allergies, you have to change the way you live and your choices. Numerous things around your home can act as a trigger, and it is the purpose of the purifier to tackle these contaminants so your allergies won’t act up anymore, eliminating them from the air.

Dust Mites

It is among the most common indoor pollutants and a leading cause of asthma in children. Your home environment is the perfect area for them to grow and multiply. They enjoy temperatures that are above 75 degrees Fahrenheit and humidity from 75% to 80%. If the humidity falls below 50%, they will simply die.

To upkeep proper humidity levels, check out the best dehumidifiers that, through their operation, relieve the air of the excess moisture that enhances the chances of dust mites lingering.

Dust mites are found in pillows, mattresses, carpeting, and upholstered furniture. To minimize them you have to remove any curtains and drapes in the bedroom and keep pets out of the area where you sleep. You should also wash bed linens frequently in hot water and keep humidity low.


If you’re suffering from allergies, you know how dangerous pollen is for the symptoms of this health condition and how difficult it is to avoid entering into contact with it as well. Different people can be allergic to different types of pollen. It’s inevitable for your home to have pollen particles because it comes from everywhere.

You should opt for wood flooring as it is much easier to clean. You should also wear a mask when you clean the house. Evidently, using an air purifier is advised since it effectively removes pollen, being imperious to run during spring when pollen pollution is at its highest.


This is a fungus that causes spores that float in the air. If a person comes in contact with a large amount, there are dreadful repercussions. As a rule of thumb, you have to remember that there are different kinds of mold, some that are visible to the naked eye and others that aren’t.

Mold grows sporadically where high humidity resides, so you should check out the best dehumidifiers for bedroom to make sure that the room you sleep in doesn’t harbor the health-threatening particles.

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How Does a Filterless Air Purifier Work

The only considerable difference between filter and filter-free systems is that filter-free units are much cheaper in the long run as there are no purification media to replace. Filters like HEPA cost a considerable amount of money. So, if you’re on a budget but you want to breathe fresh and clean air, filterless is the right choice.

They are simpler to maintain as all you need to do is clean them occasionally through vacuuming or wiping them with a damp cloth, contingent on the situation. When it comes to variants, you have:

  • Air Ionizers – The two plates integrated are electrically charged to sanitize the air. The electrical field charges the contaminants inside and clean air is released into the room. Furthermore, the other plate works similarly to a magnet. It will attract smaller contaminants and charge them. Hence, every small allergen in the room will be trapped and neutralized.
  • Electrostatic Precipitators – If you have a small living space, you will find this type helpful as it is highly efficient at removing contaminants within an enclosed space. If you open it, you will see several wires and plates that work together to make a high-voltage electrostatic field.
  • Ultraviolet Purifiers – Powerful at removing microorganisms that are harmful to your health. This is why you will see several purifiers with filters with UV technology built-in. Best of all, they’re not only highly effective but also cost-efficient.

In the majority of cases, customers feel comfortable running them day and night as the noise produced is minimal. Generally employing a 3-stage purification process, these models can be able to collect allergens down to 0.1 microns, including smoke and dust. Additionally, you will no longer need to use air fresheners as the majority of models are designed with optional ionizers.

Buying Guide

Many people recommend a filterless system due to the energy efficiency it flaunts, as well as the low upkeep costs. But exactly how do you know the choice you are making is suited for your needs? To learn what you should look into, follow the advice given here.

Coverage Area – Whether it has a filter or not, you should take a look at how much space it can cover. That particular number is a clear indication if it’s suitable for your particular needs. Some models mentioned can cover spaces up to 1,000 sq. ft. Thus, they can be used for large areas or commercial needs.

If you have a small to moderate-sized home, you would be better served by a model that covers less than 500 square feet. If the system you invest in is more powerful than needed, no actual difference will exist in performance, but you will end up spending more than you should on running it.

Noise Level – It must be silent so that it won’t present a distraction no matter the room you utilize it in. This is a stat you must look into especially if you plan on using it in the bedroom or nursery.

Dimensions – If you have a small area, you shouldn’t consider the bulky models as they will take up too much space. Measure the space you have available to figure out which model is the best option for you.

Frequently Asked Questions

Do filterless air purifiers really work?
When it comes to their efficiency in air pollution decrease, filterless models are fairly hard to top. While they might not rely on HEPA and other types of filters, this does not take away from their effectiveness. Needless to say, it’s the specific lack of filters that makes them even more appealing since long-time operational costs are reduced because you won’t have expensive upkeep tasks to worry your mind with. The only issue is that some models produce ozone when they run, but as long as the stats are within safe parameters, there’s no need for concern.

Is breathing ionized air safe?
There is no actual danger associated with inhalation or exposure to negative ions for humans. However, the ozone that filter-free air purifiers produce can be an issue if the amount is not within safe parameters (0.05 parts per million tops).

Do air purifiers work for viruses?
Yes, they do significantly reduce viruses, germs, and bacteria. Units that feature UV light sterilization are even more efficient from this specific point of view since the technology focuses on destroying microorganisms.

Should I sleep with the air purifier on?
As long as the unit you use doesn’t produce high traces of ozone (0.05 PPM tops), then it’s perfectly safe to run it during the night, while you sleep. You ought to look for a model that is as quiet as possible so that it won’t distract you during your nocturnal slumber.

Are UV air purifiers better?
Since UV technology is the best at annihilating bacteria, viruses, and germs, it’s safe to say that UV air purifiers are indeed superior to their classic filter counterparts since they provide thorough air sterilization. Moreover, they are better when it comes to energy efficiency as well.

Do air purifiers use a lot of electricity?
Most models don’t consume more than 50 watts when they run, so you shouldn’t worry about running costs in the slightest. These devices are generally known for their low power draw, and with some of the models we presented here that consume less than 20 watts, even running them 24/7 won’t amp the bills.

Do they remove odors?
Yes. All of the models we have presented here do have the ability to remove unwanted odors as they eliminate the contaminants that cause them, ensuring you are provided fresh and clean air to breathe.

Do they work for allergies?
Yes. If your allergy symptoms are triggered due to your pets, pollen, or dust, all of the models mentioned in this review will be able to remove the particles. This includes the ionizer models.

Are they as efficient as their filter-using counterparts?
Without a doubt, all of the models mentioned will work just the same as the purifiers with filters. Take a look at the reviews section to figure out which model best suits your particular needs.


Through the simplicity yet efficiency of their operation, filterless air purification systems prove to be the better choice in some cases for individuals who seek to benefit from clean air indoors. There are no filters to change, as the name implies, so upkeep costs are gone. Moreover, you needn’t worry that your neglect of basic maintenance tasks will affect the system’s performance as you do with traditional air purifiers. Before we end, let’s review some of your best options once more so that, depending on the specific use you intend for the system, to ensure you are making a selection that provides the operation you seek.

Best Filterless Air Purifier for Sale: Airocide APS-300

Hands down the best solution available for air purification due to the PCO technology it uses that makes it 100% efficient at air pollutant reduction, the APS-300 is a worthy acquisition. It can cover spaces up to 500 sq. ft. in size, which is a feat on its own since you can use it in any area at home without worrying the air purifier will be overwhelmed. It even generates zero emissions when it runs, which makes it 100% safe even for the baby’s room or bedroom. Since it doesn’t produce much noise either, you will likely leave it on throughout the night to benefit from clean air when you sleep. Add to all these aspects the fact that it’s energy-efficient, and you can see why it ranks first in our top.

Editor’s Choice: Air Oasis 1000 G3

Viable for use in spaces upward to 300 square feet, few filter-free models compare to it when it comes to air pollution fixing. The technologies it uses, innovative through their nature, ensure a safe manner to reduce up to 99% of allergens and provide a safe living space for the most sensitive of individuals, especially those who suffer from respiratory health-related issues.

Best Filterless Air Purifier for Allergies: Airfree Onix 3000

During the entire year, but predominantly in spring and autumn, allergies start to act up as the air becomes filled with triggering particles. If you suffer from allergies yourself, consider this model as it uses thermodynamic TSS technology to provide clean air in a 100% safe manner, trapping and destroying microorganisms and airborne particles. It also comes in handy for asthma sufferers due to its efficiency in clearing the air of pollutants without the use of ions or ozone generation.

Best Filterless Air Purifier for Dust: Airfree Lotus

Likely the most customary air pollutant indoor spaces are dealing with is dust, and with the Lotus system, you can finally breathe easy knowing this specific issue is targeted and handled properly. There are a lot of individuals who suffer from dust allergies, this common affliction being quite problematic as it is inevitable for the dust to linger in the air and settle on surfaces. Nonetheless, through the TSSTM technology it utilizes, it obliterates the particles from the air, alongside microorganisms, mold, and other pollutants, leaving the air fresh and safe.

Best Filterless Air Purifier for the Money: Envion Ionic Pro Turbo TA500

The price-to-quality ratio of this Envion product makes it a value deal that is hard to refuse. Aside from costing significantly less than products in its efficiency range, it doesn’t draw much power when it runs either. Therefore, you can leave it on 24/7 and not notice a significant raise when the bills are due. Needless to say, what makes this budget deal even more tempting is that it reduces indoor air pollution by 99.9%, so you cannot overlook its performance either.

Markus Mackay
Markus Mackay
Our resident expert in all things AC-related, Markus is a never-ending source of knowledge regarding how these systems work. What makes him so savvy in this field is his direct experience that he acquired while working in sales. The connections he made during that period also came in handy here as Markus knows a lot of experts in this field. With each article uploaded, he makes sure to gather the expertise of his more experienced ex-peers as well, making sure to provide readers with reliable reviews and articles.

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