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7 Best Filterless Air Purifier In 2022 (No Filter Change!)

Depending on your point of view, the best filterless air purifier can be an eco-friendly machine that saves a lot of time and effort in maintenance. It can also be looked upon as a sub-standard unit that falls behind a HEPA air cleaner. Some may even argue about its usefulness as there is no filter involved. To search for a particular model according to your needs, we have conducted endless hours of testing, comparison, and reviews in search of the best models. Whatever takes you have, we're here to refute the negative aspects and lead you to a whole new perspective on what a filter-free air purifier can do.
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Who is this for?

A person that wants to stay healthy by breathing clean air would benefit from a filterless air purifier. Busy parents who do not want to be tied down with another home appliance and are tired of cleaning air filters could do with one. An asthmatic or hyperallergic person that is constantly sick due to dirty air. Newborns, babies, and children with developing immune systems will also benefit from one. Lastly, anyone confused about whether to purchase an air purifier without any filter needs to read our reviews below.

2022 Best Filterless Air Purifier

BEST BUDGETBEST OVERALLBEST PERFORM-ANCEPERFORMANCE
GermGuardian GG1100 Elite ReviewClarifion Negative Ion Generator GL-139 ReviewAirfree Lotus Filterless Air Purifier Review
GermGuardian GG1100W/ GG1100B Air PurifierClarifion Negative Ion Generator GL-139 Air PurifierAirfree Lotus Air Purifier
Technology
UV-C LightUV-C LightThermodynamic TSS
Recommended Room Size
56 sq. ft. (5 m2)150 sq. ft. (14 m2)650 sq. ft. (60 m2)
CADR
Dust N/A
Pollen N/A
Smoke N/A
Dust N/A
Pollen N/A
Smoke N/A
Dust N/A
Pollen N/A
Smoke N/A
Filtration
1-stage1-stage1-stage
Ratings
3.8out of 53.6out of 54.2out of 5
Amazon Price
$$$$$$$
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** MSRP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is accurate at the time of posting.
^ Annual filter cost is calculated based on filter price and 12 hours of usage. Pricing could vary depending on air quality, usage frequency, and speed.
` The indicated online price guides as follows: $ = under $50, $$ = $50-100, $$$ = $101-200, $$$$ = 201-300, $$$$$ = $301-400, $$$$$$ = 401-500, $$$$$$$ = over $500.

How Do We Measure?

The "permanent" filtration

First and foremost, the air cleaner must be filter free. If any filters require replacing, they will not be featured on this list. Next, the primary filtration can be reused over and over again without expiring. As such, an Ionizer, UV-light, Electrostatic precipitator, heat sterilization, and Photocatalytic oxidation will all be considered except the ozone generator. Any devices that use ozone to clean the air are straight off the list. We will measure the device's effectiveness against household allergens, smoke, fumes, and odors. The quicker it kills off the irritants, the more consideration weight we will place on the model.

Room size/ Coverage + Noise Level

This one is a no-brainer. The larger the purifying coverage, the bigger the room size an air cleaner can cover. As most air purifiers without filters are not CADR tested, airflow delivery rate plays a key role here. The only "must" criterion is the noise level has to be silent throughout the entire operation.

Selling price

Since filter replacement cost is nil, the selling price is critical in deciding the "right" one. There is no point in buying an expensive air purifying device that does not work or takes years to recuperate. We will also judge the unit's worthiness compared with a classic HEPA air cleaner.

What To Look For In a Filterless Air Purifier

There are not many 100% filter free air cleaners on the market, and most models come in a hybrid form with at least one reusable filter. If you have already set your heart on one, here are some great features you should take into account when buying a filterless air purifier. The more knowledge you have of a product, the better decision you will make.

  • Particle Removal Capacity - The airflow effectiveness of the filterless air purifier in removing airborne particles. Look for a model capable of removing at least 99 percent of the contaminants.
  • Modes of Operation (fan speed) - Most filterless air cleaners utilize an easy one-touch operation that runs on a single mode. Others come with standard 3 fan speed modes: low, medium, and high, while advanced models include built-in sensors for autonomous operation.
  • Coverage area - The greater the coverage, the more clean air can be distributed. Measure the room size you need will make a big difference in the overall efficiency. Some models can only cater to small spaces, while others can cover more than 1,000 square feet. For example, if you intend to place the device in a 300 sq. ft. room space, pick a model that can handle at least the minimum range.
  • Purifying technologies - Depending on the nature of the contaminants, choose from ultraviolet light, negative ion generators, or Thermodynamic TSS Purification Technology. The technology chosen will electrochemically remove particles and purify indoor air.
  • Dimension - If you are staying in a limited room space, it makes sense to choose a portable air cleaner over a bulky one. Most air purifiers with no filter are compact and lightweight compared with a HEPA device. Some models even come in a pluggable form that you can plug into the wall or bring it around for travel.
  • Noise output - The best perks of owning a filter-free air cleaner is the noiseless operation free from distraction. Ideal for workspace, bedroom, nursery room, or anywhere you need to stay focused. For models that do generate noise, pick a model that has a noise level of less than 30 dB for minimal distraction.
  • Energy consumption - The more powerful the airflow, the more energy is needed. That said, most no filter air purifiers consume little energy due to the non-dependable of a conventional motor fan. You can easily tell if a model is energy-efficient with the Energy Star label printed on the box.
  • Warranty - Try to look for a model that offers more than a 1-year warranty. The longer the period, the better assurance you will get from the manufacturer. It will give you peace of mind during the course of ownership and protection against power fluctuations. Also, consider the service center location and what parts the warranty covers. Pay close attention to brands with notoriously bad track records.
  • Other features - To stand out among the crowd, most manufacturers will add extra features to improve the usability of their products. Features like a night light, timer, digital display, or mood light are worth pondering upon if you don't mind the increase in pricing.

1. GermGuardian GG1100W/ GG1100B Air Purifier

GermGuardian GG1100 Elite Review

You can't have the best filterless air purifier without introducing a plug-in air sanitizer and deodorizer. GermGuardian GG1100 Elite is the updated version of the popular GG1000 that comes in 2 colors (black & white). A dependable, cost-effective technology that is great at removing bacteria, viruses, and mild household odors without the use of a filter. At less than 40 dollars after applying a discount, it is very accessible that everyone can afford this tiny pluggable air cleaner.

With its filter-free body, GG1100's modern and simplistic design is nicely balanced with a LED circle ring indicator. The glowing LED lets you know the UV sanitizer is busy sterilizing the air in the background. At 6.75 x 6.75 x 3.5 inches and 0.7 pounds, GermGuardian GG1100 Elite Pluggable UV-C Sanitizer and Deodorizer fit perfectly in a handbag or luggage during travel. Something a filtered air purifier simply cannot do. The non-filter setup means no messy filter washing or costly replacement is needed. Just plug GG1100 Elite into a wall socket, and you are good to go. No complicated controls to figure out like in most premium air cleaners. There's even a USB port where you can charge other devices while GermGuardian GG1100 sanitizes the air. Perfect for allergy sufferers that need to sleep with healthy, clean air during travel.

A germ-killing, ozone-safe, affordable UV-C air sanitizer that can be plugged into a wall socket. Coverage is small, so you will need multiple units to cover an entire home.

Unlike a HEPA filter air purifier that heavily relies on a fan, the GermGuardian GG1100 UV-C light filtration is completely noiseless. You will barely notice its existence when it is performing air cleaning. Filter-free GermGuardian GG1100 Elite is also cheap to run as it uses very little energy with a small 3.5 Watt light bulb. We have a few running units installed at home and have little impact on the monthly electricity bills. The standard 120V/ 60Hz power voltage is safe to use around children or pets with no risk of burning. Being CARB compliant, you can safely leave it running the whole day when you're away on a trip.

The complete opposite of a conventional filter air purifier that uses multisets of filtration. GermGuardian GG1100 Elite relies solely on UV-C light with titanium dioxide. A filterless, century-old technology that uses short-wavelength UV-C to permanently kill germs, bacteria, viruses, and mold spores. When microorganisms are drawn into the chamber, the spectrum of ultraviolet light will penetrate the protective wall and reduce the germs' DNA. The genetic structure of the bacteria and viruses will be altered, thus disabling their ability to reproduce. Adding to the UV light is the disinfectant titanium dioxide that decomposes microorganisms via photocatalysis. This joint purification will continue until all irritants and odors-causing cells are destroyed. Very effective against allergens that produce no amount of harmful chemicals byproducts. If you have a smelly room, we highly recommend placing the no-filter air purifier in the bathroom or bed rather than relying on an air freshener.

GermGuardian GG1100 Plug In UV-C Sanitizer Review

While GermGuardian GG1100 Elite takes up very little interior space as it is pluggable, there are some trade-offs to consider. The small 56 square feet coverage means you will have to place it very close to the pollutant sources e.g. next to the litter box, toilet bowl, diaper pail, or ventilation. It simply does not have the air cleaning coverage of a filtered air purifier. Being a filter-free air purifier, the filtration depth is very restricted and slow. Do not expect similar quality as a HEPA filter in dealing with microscopic particles. There is also an estimated 15% reduction in efficiency after 4,000 hours of usage. You will have to bear the 15-30 dollar UV lightbulb running costs every 6-12 months (4,000-5,000 hours) for optimum performance or when the bulb flickers or changes colors. Simply put, it is not a direct replacement for a HEPA air purifier. If you understand the limitations, there's no doubt this low-maintenance UV sanitizer will work well as intended.

In short: A germ-killing, ozone-safe, affordable UV-C air sanitizer that can be plugged into a wall socket. Coverage is small, so you will need multiple units to cover an entire home. ⚠️ Buy this filterless air purifier to compliment your existing HEPA air purifier.

Build Quality

Features

Coverage

Particle Filtration

Smoke Filtration

Price

Filter Cost

3.8

OUT OF 5

online price (US)** Sales Tag
±39.99 $/ 7

(annual filter cost ±15-30)

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2. Clarifion Negative Ion Generator GL-139 Air Purifier

Clarifion Negative Ion Generator GL-139 Review

The only pluggable ionizer air purifier without a filter on the list. Clarifion GL-139 Negative Ion Generator is a maintenance-free, hassle-free, and filter-free air cleaner with no recurring cost. Just pay the one-off fee, and you can reuse it again and again without fail. There are absolutely no replacement parts needed for purification. House in a mini but mighty body, the small 4 inches width and 6 inches in height Clarifion GL-139 fits steadily on a standard wall socket with local voltage. With the light 4.8 lb weight, you have the flexibility to bring the ultra-compact air ionizer during work or trips, something a bulky filter air purifier can't do. Just plug it into a hotel or guest room notorious for hosting unhealthy air.

Clarifion GL-139 is super easy to use and operate. Being a plug and play filter-free air cleaner, there are no complicated controls to worry about. You can go on with your busy day while Clarifion quietly cleans the air. Since no noise is generated, you can only tell if the negative ion generator works with the glowing blue LED light. Perfect for a home that could do with some air-cleaning without the unwanted loud distraction e.g. baby room, workstation, kitchen, living room, dining room, garage, dorm, or bathroom. The ultra-quiet ionization cycle only uses very little electricity (less than 1 watt), even if you are running all day, every day. A big advantage over a more energy-draining filter air purifier with a fan.

A cheap air ionizer that does not need maintenance or filter change. The coverage area is small but expected, given its pluggable compact form.

Clarifion GL-139 focuses solely on ionization technology disperses up to 10 Million pcs/cm^3 of Negative Ion-Output. By leaving the ionic air purifier run autonomously, millions of negative ions will be diffused into the air every second. The charged ions will latch onto nearby lingering positive ions contaminants. As a result, the merged particles will drop due to the increased weight. The air will be cleaner and free of airborne pollutants. You will then have to perform vacuuming to clean out the fallen particles. Otherwise, the particles will be stuck on the wall, sofa, table, or floor, with the risk of stirring back up. Negative ion is a 100% safe, ozone-free, proven technology that does not require any filter. However, its effectiveness against large particles and allergens is rather restricted than an air purifier with a HEPA filter. As such, Clarifion GL-139 will only cover up to 150 square feet of room space in ideal condition. For best performance, make sure it is at least 5 feet from the ground, and the airflow is not impeded by furniture or any household items.

Clarifion Negative Ion Generator GL-139 review

The drawback for Clarifion GL-139 Negative Ion Generator? Like all filterless pluggable air cleaners with a tiny form factor, it has a limited capacity as an ionizer technically doesn't remove any airborne contaminants in the room. You will still need to perform routine cleaning and vacuuming to get rid of the particles for good. It is also weak against heavy smoke and odors. To counter the weaker filtration, an air ionizer is best paired with a HEPA air purifier. Both can bring the best out of each other. A UV sanitizer will probably suit you better if you travel often and could do with a dedicated plug-in model.

In short: A cheap air ionizer that does not need maintenance or filter change. The coverage area is small but expected, given its pluggable compact form. ⚠️ Buy this if you understand how an ionizer works and do not mind cleaning on a regular basis.

Build Quality

Features

Coverage

Particle Filtration

Smoke Filtration

Price

Filter Cost

3.6

OUT OF 5

online price (US)** Sales Tag
±39.99 $/ 7

(annual filter cost ±0)

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3. Airfree Lotus Air Purifier

Airfree Lotus Filterless Air Purifier Review

Airfree Lotus is our favorite filterless air purifier in this list that requires no filter change, no recurring fees, and no maintenance. This European-made, heat-powered machine is precisely named for its unique resemblance to a beautiful Lotus flower petal opening. At 7.7 x 13 x 7.7 in dimension and 3.3 pounds, it holds little presence in your home. Adding to that is the silent Thermodynamic TSS Technology operation without the need for a huge fan. For comparison, a typical mechanical air cleaner is at least 2 times as bulky and heavy as a filter-free Lotus to support its multi-stage filtration.

What makes an Airfree Lotus filterless air purifier more expensive than the normal Airfree lineup is the inclusion of premium aesthetics. Between the filter-free lines, there is 10 pleasing multi-color light ranging from Red, Rose, Violet, Blue, Light Blue, Green, Yellow, Orange, Brown, and Grey. While the function serves no purpose to the air quality, it helps blend in the air purifier as part of the home decor. You can also use it as a nightlight for a family with children sleeping in their room. The adjustable light will give them a sense of security and help them navigate through the dark when natures call in the middle of the night.

A reliable, filter-free air purifier that kills mold, germs, bacteria, and viruses silently while you sleep. Suitable for asthma and allergy sufferers with a compromised immune system.

Let's focus on Airfree's patented and environmentally friendly Thermodynamic TSS Technology, a filter-free air cleaning method that uses heat to clean the air. Drawing 14,000 to 20,000 liters of air hourly into its chamber, Airfree Lotus will boil up the air to 400°F safely inside. The sterilization instantaneously kills 99.99% of microorganisms like pet dander, pollen, mold, dust mites, tobacco, odors, bacteria, and viruses instead of just capturing them. Even harmful ozone can be eradicated with no chance of escaping. When the air is completely purified, clean air will be cooled down internally and released back at normal room temperature. The entire purification process is completely silent, uses no filter, and requires no maintenance. All you have to do is switch on the device, and the machine will automatically clean the air on its own. After 24 hours of non-stop operation, Airfree Lotus can cover up to 650 square feet of room space. Work, play, and sleep while breathing in fresh air so long the Airfree machine is kept on.

Airfree Lotus Filterless Air Purifier Review

Other perks of the Airfree Lotus air purifier include the low noise operation. Since there is no built-in motor and filter, it will run silently without disturbing your daily activity. It is also economical, with no washing, parts, or filter change. A stark contrast to a filter air purifier that requires monthly attention. The 110-127 voltage and 52 watts energy usage are not the lowest but still manageable for everyday use. Perhaps the most critical factor of all, there are no ions and ozone emissions during air purification. Thermodynamic TSS technology is certified on its safeness with Thermistor safety sensors, thermal fuse, tilt sensor, varistor, and current limiting fuse. It is designed to run 24x7 without shutting down.

Not everything is sunshine and roses with Lotus. There are some minor complaints to ponder on. First off, it does not capture dust or any large particles quickly enough, a common filterless air cleaner theme. Filtration performance is incomparable to a medical-grade HEPA filter. You are still at risk of inhaling impurities in the air. To ensure consistent performance, Airfree Lotus must be turned on at all times, more so than a conventional mechanical filter air purifier. Pricing is slightly steep for a filterless air purifier despite the future savings you will enjoy. You can get a decent HEPA machine at half the cost. Lastly, the machine does feel warm after long hours of operation but not to the extent it will cause burn damage. You can use it around children or pets without having to worry about leakage. That's all the cons of a filterless air purifier.

In short: A reliable, filter-free air purifier that kills mold, germs, bacteria, and viruses silently while you sleep. Suitable for asthma and allergy sufferers with a compromised immune system. ⚠️ Buy this if you want a maintenance-free, effective air purifier and don't mind the 300+ price tag.

Build Quality

Features

Coverage

Particle Filtration

Smoke Filtration

Price

Filter Cost

4.2

OUT OF 5

online price (US)** Sales Tag
±399.00 $$$$$/ 7

(annual filter cost ±0)

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4. Airocide APS-300 Air Purifier

Airocide APS-300 Filterless Air Purifier Review

Airocide APS-300 is the best UV-dedicated, filterless air purifier with an advanced NASA developed PCO catalyst. The same purification technology keeps the air safe for astronauts in the International Space Station and the Columbia shuttle. For over 2 decades, Airocide APS-300 has been used in hospitals, nursery homes, wineries, health care facilities, food processors, and grocery stores to keep fruits fresh and protect against premature ripening or rot due to high VOCs concentration levels.

Being the successor model to the APS-200 model, the award-winning APS-300 receives major upgrades in performance and design. A significant and much-needed improvement considering the price tag of this filter-free UV technology.

The best filterless PCO air purifier with NASA-developed technology. Expensive but proven safe and effective in eradicating carbon-based pollutants.

Without the need to allocate filters inside its body, the new cutting-edge design incorporates metal and wood trim with a neutral white bezel. The premium touch will complement nicely modern home decor without sacrificing its usability. At only 9 pounds in weight and 6.9 x 18.7 x 6 inches in size, APS-300 barely takes up any indoor space and can fit nicely on a desk, table stand, or top of a cabinet with a secure base. The adaptable, no filter designs allow you to place the air cleaner straight up, lying down, or mount it to a wall without affecting its performance. Overall, everything feels expensive (it is), with an easy removal panel and protection case to prevent UV leakage. The vary 2 years warranty comes with an extended option to 5 years. There's even an industry-leading 60 days, 100% satisfaction money-back guarantee if you are unhappy with the purchase.

As for controls, you have 3 easy to use buttons that manage the speed from low, high, and auto. A rare feature in UV air cleaners since most filterless models only come with a single mode due to the lack of a fan. The air purifier will default start with a high-speed setting to ensure the right amount of clean air is disbursed (Coanda effect). An important feature as UV radiation is not known for its speedy air cleaning. In most situations, you should leave it in Auto mode. The fan will always run at high speed when air quality is not ideal and only switch to low speed when the room turns dark via the built-in light sensor. On everyday use, Airocide APS-300 is quiet, effective, and energy-efficient at a max of 60 watts. Perfect for keeping the noise level down for a good night's sleep.

No filter is used throughout the entire purification. A vast difference from your regular plug-in UV sanitizer in air cleaning performance, APS-300 is at another level with its Class 2 medical device clear by FDA and CARB compliance. In 2018, Airocide APS-300 filterless air purifier received a significant upgrade with 2 advanced filter technologies. The internal fan will draw air into the hollow glass tube coated with a catalyst. Through oxidation, PM 2.5, bacteria, germs, mold spores, pollen, VOCs, benzene, formaldehyde, and ethylene will be eliminated through UV exposure. Photocatalytic Oxidation (PCO) effectively eliminates airborne pathogens and toxic fumes for good. By altering the DNA, there is no chance of the allergens multiplying and spreading. Best of all, zero ozone emission or harmful byproducts are produced despite the ultraviolet rays of nature. Titanium Dioxide (TiO2) is safe and stable as the free oxidizers will not travel too far from the catalyst surface. After all, it is a technology used in a sealed spacecraft.

Airocide APS-300 Filterless Air Purifier Review

Airocide APS-300 can cover up to 300 square feet of room space at high speed without a single use of filter. Comparable to a mid-range filter air purifier performance but at a cost. To ensure an optimal result, you will have to replace the reaction chamber cartridge every 12 to 15 months, depending on the usage frequency and air quality. The cartridge change is easy and will only take 30 seconds to do so by removing the grill plate.

The biggest downside to this NASA air purifier is the selling price. At around 999 dollars, excluding any discount, other affordable filter-free air purifiers cost 3-4 times less but with much poorer performance. Another thing is the high reaction chambers cartridge replacement costs around 100+ dollars annually. Not the highest in its class but a hefty sum, especially for those looking for a filterless air purifier. Still, it is comparatively cheaper than a high-tech, multi-stage HEPA filtration set. If you want the most advanced filterless technology to remove VOCs, you can never go wrong with Airocide APS-300.

In short: The best filterless PCO air purifier with NASA-developed technology. Expensive but proven safe and effective in eradicating carbon-based pollutants. ⚠️ Buy this if you need an easy-to-maintain PCO catalyst air purifier and are willing to pay for the best.

Build Quality

Features

Coverage

Particle Filtration

Smoke Filtration

Price

Filter Cost

4.1

OUT OF 5

online price (US)** Sales Tag
±999.00 $$$$$$$/ 7

(annual filter cost ±111-139)

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5. GermGuardian GG1000 Pluggable Air Purifier

GermGuardian GG1000 Pluggable Air Purifier & Sanitizer Review

The older version of GG1100 with the exact functionality of providing clean, fresh air. GermGuardian GG1000 Pluggable UV-C Sanitizer is many people's favorite go-to air purifier without filters. It is small, affordable, effective, and comes with a distinctively sleek design that sets it apart from every air purifier here. It is also straightforward to use without any control to tinker around. You will have no issue plugging it into any wall socket at 3.2 x 7.5 x 3 inches in size and a mere 0.7 lb in weight. Just leave it close to the contaminant sources and let the filter-free UV air purifier quietly clean the air.

GermGuardian GG1000 meets the strict standards set by the California Air Resources Board (CARB) as an ozone-safe air cleaner. Besides reaping the benefits of not having to replace any filter, you don't have to worry about the electricity bill as it uses less energy than a standard lightbulb. Our test units have been running for months, and there are zero spikes in the electric bills. The 120V/ 60Hz electricity is perfectly safe around children and pets with zero risk of UV exposure. If you have a baby at home, installing multiple units around the house can safeguard the little one from falling sick due to airborne viruses.

A cheap and wall pluggable room sanitizer with UV-C light technology. Capable of eliminating close-range germs and household odors without the use of filters.

Like GG1100, GermGuardian GG1000 filterless air purifier is powered exclusively by ultraviolet light technology with titanium dioxide. It releases safe short-wavelength UV-C light radiation that destroys nucleic acids and disrupts microbes' DNA from reproduction. Titanium dioxide (TiO2) will further disinfect the germs, effectively killing or inactivating them. Given exposure time, nearby bacteria, viruses, musty mold, smelly toilets, and diapers will be eliminated by ultraviolet light for good. Unlike a conventional filter that only captures them with the risk of multiplying and escaping.

Being a pluggable unit, GermGuardian GG1000 is flexible with placement and is often utilized in residential areas. You can use it in hospitals, commercial buildings, and offices as long as there is a local power source. Perfect for bringing around for travel or inserting in tight spaces like a toilet, kitchen, laundry room, baby room, and a walk-in wardrobe that lacks the space for a HEPA air cleaner.

No cleaning is needed as there is no filter inside the UV technology. Simply replace the UV-C light bulb when it reaches its 4,000-5,000 expected lifespans for optimal performance. The bulb's performance will degrade over time (approximately 15%) when it reaches its end cycle. We recommend changing the 3.5-watt lightbulb every 6 to 12 months or when the bulb starts flickering and changes colors. The low running cost light bulb will only set you back 15-30 dollars per change, far cheaper than most filter-dependant air purifiers out there.

GermGuardian GG1100 Plug In Air Purifier Review

There are two downsides with GG1100 you have to take note of. First, the very limited purifying coverage (less than 60 square feet) means this is not a direct substitute for a filter air cleaner. For a home with very unhealthy indoor air, this is not the model that will rectify that. Second, it is less effective against dust, hair, and other large airborne particles due to the slow sterilization rate. The light bulb also requires replacing, even though it is relatively cheap to do so. Other than that, GermGuardian GG1000 is a worry-free and maintenance-free Pluggable UVC Air Sanitizer & Odor Reducer. If you plan to have only one filter-free air purifier in your home, Airfree models would be the better choice.

In short: A cheap and wall pluggable room sanitizer with UV-C light technology. Capable of eliminating close-range germs and household odors without the use of filters. ⚠️ Buy this if GG1100 is unavailable or there is a huge ongoing discount.

Build Quality

Features

Coverage

Particle Filtration

Smoke Filtration

Price

Filter Cost

3.8

OUT OF 5

online price (US)** Sales Tag
±59.99 $/ 7

(annual filter cost ±15-30)

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6. Airfree Iris 3000 Air Purifier

Airfree Iris 3000 Review

Airfree Iris 3000 is a beautiful, black housing air purifier that destroys allergens and odors without any filter. Like Lotus, it is made in Europe with ISO 17025 grade assurance. This compact bullet head design stands at a diameter of 8.4 inches and 10.4 inches in height, much smaller than a typical HEPA air purifier. At only 3.3 pounds, moving the filterless air device around from room to room purifying is seamless and can be carried with one hand. The build quality is top-notch, with no signs of off-gassing or leakage. You can place it on a cabinet or table and let it run for days without being too intrusive.

Having the added advantage of not having to replace the filters or lightbulb, Airfree Iris 3000 works straight out of the box. Turn it on and let the TSS Technology slowly and quietly purify the air. Unlike air fresheners that mask any unpleasant smell, Airfree Iris 3000 can genuinely get rid of foul odors coming from microorganisms. Ideal for a person with hypersensitivity, especially to chemicals.

Heat sterilizer air purifier with zero noise output and supports up to 650 square footage of room space. No filter change or maintenance is ever needed.

Other similarities between Airfree Iris 3000 and Lotus are the one-button operation, wide 650 square feet capacity, and 10 adjustable multicolor lights ranging from Red, Rose, Violet, Blue, Light Blue, Green, Yellow, Orange, Brown, Grey. Power consumption is rated at 52 watts hourly. Somewhat efficient given it is a device that uses a heating element like a stove.

Instead of using filters, Airfree Iris 3000 Thermodynamic TSS Technology applies the concept of boiling water (sterilization). With 14,000 to 20,000 liters of air passing hourly through natural convection, the mini-ducts will heat the air over 400 degrees Fahrenheit. The exceedingly high temperature will eliminate 99.99% of tobacco smoke, mold, pollen, bacteria, and viruses in a fraction of a second. The now purified air will be cooled down for a couple of minutes and distributed silently at room temperature. Great for bedrooms, living halls, workplaces, and baby rooms, as you can barely hear any noise from the air purifier. Airfree Iris 3000 filterless purification process is certified to be safe with built-in thermistor safety sensors, thermal fuse, tilt sensor, varistor, and current limiting fuse. There is no chance of the unit overheating or catching fire. Unlike an Ozonator, Airfree Iris 3000 does not release toxic ozone gases that can trigger asthma and destroy lung tissue cells. In fact, Airfree Onix 3000 can prevent mold and reduce ozone by 26%, as tested in Sweden's laboratories.

Airfree Iris 3000 Filterless Air Purifier Review

Over $200, Airfree Iris 3000 is not the best price-to-performance ratio model in the category. Still, the biggest setback is the slow output in churning out clean air compared with a mechanical air cleaner. It is nowhere near HEPA grade filter, but that's the beauty of a filterless device. It is in for the long run with cost-saving, reusable technology, and no filter replacement perks. The unit can also get hot after running for a few hours though it will not increase the room temperature in any shape or form. If you don't mind the slow purification that takes days to cover an entire room, there are other mirroring models e.g. Iris 3000, P3000, and P2000.

In short: Heat sterilizer air purifier with zero noise output and supports up to 650 square footage of room space. No filter change or maintenance is ever needed. ⚠️ Buy this if you want the Airfree Thermodynamic TSS technology at a fairer price.

Build Quality

Features

Coverage

Particle Filtration

Smoke Filtration

Price

Filter Cost

4.2

OUT OF 5

online price (US)** Sales Tag
±329.00 $$$$/ 7

(annual filter cost ±0)

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7. Air Oasis 1000 G3 Air Purifier

Air Oasis 1000 G3 Air Purifier Review

A portable, UV ionic surface sanitizer that can improve indoor air quality and the respiratory system. Air Oasis 1000G3 is the pioneer that incorporated NASA developed PCO technology into a compact home air purifier. A virtually maintenance-free, filter-free technology that can clean the air from allergy-causing pathogens and bio-contaminants. Like Airocide APS-300, it inherits the good and bad that come with the technology. Let's explore.

From the exterior, you can tell the Air Oasis 1000G3 UV Ionic Air Purifier is nicely built with a sharp, modern approach. While it may not possess the jazz as the Airocide APS-300, the anodized brushed aluminum & polymers elevate the premium feel without adding much to the overall weight. The no filter setup allows a much smaller body and takes up very little interior space. At a mere 14.1 inches in height, 4 inches in diameter, and 6 pounds in weight, moving the Air Oasis around is a breeze. You can place it anywhere in the room that needs purification. The sturdy base keeps it steady and prevents the air cleaner from toppling over. Safe for children and pets to use with zero exposure risk.

An ionic photocatalyst air purifier that can eliminate a broad range of aerial irritants. The only running cost is the light cell that requires replacing every 2 years.

For this latest version, Air Oasis 1000G3 noise insulation has been improved (30 dB) despite having better air filtration. You can use it quietly in the bedroom for days without maintaining it or cleaning the pre-filter. Don't worry about energy usage as it only uses 15 watts of electricity hourly. We have been running it for months and have not noticed a spike in our electric bills. Functionality is straightforward, which can be a good thing for some people that like to keep things simple. The lifetime warranty is the perfect icing on the cake covering everything except the cell and movable parts.

Inside the heart of the filterless UV Ionic air purifier is the 3 advanced, powerful technologies experimented with by Einstein and NASA. It uses the enhanced version, patent-pending advanced hydrated photocatalytic oxidation (AHPCO) with germicidal UVC. By converting water vapor into decontaminating ions through AHPCO catalyst, the broad-spectrum UV light will create oxidizers to neutralize up to 99% of bacteria, viruses, H1N1, mold, Mycotoxins, MRSA, VOCs, Legionella pneumophila, Aeroallergens, Formaldehyde, and odors to trace levels. The remaining oxidizers will gradually convert back into harmless oxygen and hydrogen. Bi-polar ionization will disperse millions of ions into the air and break down particles on a molecular level. The diffused oxidizers are 100% safe, and the ozone output is less than 0.05 PPM (EPA standard). Air Oasis G3 can also address mold issues that can lead to chronic mold-related illnesses like chronic coughing, sneezing, COPD, CIRS, and Pulmonary edema. All this can be achieved without the need for a filter. A breakthrough in technology.

Air Oasis 1000 G3 UV Ionic Air Purifier Review

No other PCO air purifier can compete with Air Oasis 1000G3 filterless air ionizer and surface sanitizer. Combining ionization and AHPCO Technologies, Air Oasis 1000G3 can help relieve allergies triggered by seasonal hay fever, ragweed, mold, and pets. With an impressive 300 square feet of purifying coverage, you can find G3 in residential and commercial grounds, including contaminated basements, schools, offices, hospitals, salons, pet clinics, and government agencies.

Air Oasis G3 is very well-priced with the lowest range 1000G3 at 399 dollars, larger room 600 sq. ft. 3000G3 variant at 499, and most powerful 900 sq. ft. 3000XG3 at 549 dollars. You can even upgrade to a nano induct whole-house photocatalytic air purifier mounted on the HVAC system's ducts. There are a few minor cons with Air Oasis 1000G3 that we have to mention. The replacement cell will cost you around 90 dollars annually. We highly recommend replacing it prior to the suggested date to avoid a dip in performance. The lack of a sensor, auto mode, and timer is either a PCO trade or an apparent cut-cost measure. Against dust and other large particles, it is not on the same par as HEPA air cleaner due to the slow removal rate and higher selling price. Finally, the limited availability can be annoying as not all major retailers carry the brand. Still, if you want an ionic surface sanitizer air purifier with proven safety records, why not give Air Oasis 1000G3 a shot?

In short: An ionic photocatalyst air purifier that can eliminate a broad range of aerial irritants. The only running cost is the light cell that requires replacing every 2 years. ⚠️ Buy this if you want the best PCO + ionizer air purifier currently on sale.

Build Quality

Features

Coverage

Particle Filtration

Smoke Filtration

Price

Filter Cost

4.1

OUT OF 5

online price (US)** Sales Tag
±399.00 $$$$$/ 7

(annual filter cost ±90)

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Max Fernandez

A loving father and a dedicated reviewer for airfuji.com with more than 1000 air purifiers under his belt. Max Fernandez is also one of the million patients currently suffering from asthma. Feel free to nudge him if you have any questions.

 

Airfree T800 Air Purifier

Airfree T800 Air Purifier Review

The cheapest, no fancy design, cylinder shape air cleaner without any filter. Airfree T800 is powered by the same Thermodynamic TSS that can be found in other more expensive Airfree models. A patented filter-free technology that produces no ions and can reduce harmful ozone levels. It is quintessential of a filterless air purifier. Nothing more, nothing less.

The most affordable, smallest, and lightest Airfree air cleaner with no filter. It uses the same Thermodynamic TSS technology but with a smaller coverage and dated design.

Compactness and portability are undoubtedly one of the key selling points, something a filtered air purifier couldn’t do. Airfree T800 comes in at a thin 6.1 inches diameter, 12 inches in height, and a mere 1.5 lb weight. It is well-sealed yet slim due to the filterless setup. You will have no issue finding a place to fit T800 in the interior space, regardless of how big or small it is. The one-button mode makes operating the air purifier a breeze. Just turn it on, and you can leave T800 running for days without making any adjustments. A great natural solution for people suffering from respiratory allergies yet too busy to learn and maintain an air purifier.

Here is the key specification of Airfree T800.

  • Purifying Technology – Thermodynamic TSS Technology
  • Dimension (W x H x D) / Weight – 6.1 x 12 x 6.1 in / 1.5 lb
  • Coverage Area – 180 sq. ft.
  • Energy Consumption – 33 watts
  • Noise level – Silent
  • Odor Absorbing – Yes
  • Ozone Free – Yes
  • Warranty – 2 years

Unlike a mechanical filter that traps airborne irritants, Airfree T800 can permanently eliminate 99.99% of allergens through heat, similar to boiling water. When air filled with contaminants is drawn inside the core, the inner mini-ducts heat the air over 400°F, sterilizing any organic allergens and odors like mold, pollen, dust mites, bacteria, viruses, pollens, and pet dander within minutes. The heated, purified air will cool down in the machine, leaving only clean air out at normal tempQerature. According to an independent lab test in Sweden, the purification process will also reduce ozone in the air by 26%. You should experience a surreal difference in air quality after running for a couple of hours. For optimal performance, it is recommended you leave it on for at least 24 hours. Being half the price of most Airfree models, you can get more than 1 unit and position it in multiple locations for more comprehensive room coverage.

Airfree T800 Filterless Air Purifier Review

Airfree T800 is proven to be safe for pets and children despite the concealed heating elements. It is also maintenance-free and eco-friendly from its filter-free setup. While it might not be as effective as a HEPA filter, it is cost-efficient that uses very little electricity at an average of 33 watts. With no filter cost to bear, you will save a lot of money and time in the long run compared with a conventional HEPA air purifier. Another advantage is the heating technology that operates silently in the background without disrupting your day-to-day life. Ideal for night use where you can place it next to your bed while you enjoy a good night’s sleep. You can also place it at the office desk, kitchen, baby room, or pet area that could with clean air and serenity.

Due to the low entry-level cost, Airfree T800 shares a few noticeable downsides that are a deal-breaker for some. First, the dated design does not have a nightlight that can enhance the room decor. It might not seem like a big deal, the less appealing look will discourage some from running T800 every day, defeating the purpose of an air purifier. The recommended 180 square feet of purifying coverage is relatively small for medium or larger room sizes. It takes its own sweet time to purify the air completely. It is also not great against large particulate matters e.g. dust, hair, and can topple when you’re not careful. Something a basic HEPA air cleaner would have no problem with. At the end of the day, Airfree T800 will kill germs, bacteria, and viruses similar to its big brother at a fraction of the cost. What else could you ask for more?

In short: The most affordable, smallest, and lightest Airfree air cleaner with no filter. It uses the same Thermodynamic TSS technology but with a smaller coverage and dated design. ⚠️ Buy this if you want the heating air cleaning technology at the lowest price possible.

Other Alternative Options To Consider

Envion Ionic Pro Turbo
Envion Ionic Pro Turbo

A good, silent, inexpensive model that is either discontinued or out of stock. Envion Ionic Pro Turbo is a sleek tower air purifier designed for a large room with up to 500 sq. ft. of space. With the overall 7.5 x 28.5 x 9.5 inches in size and 7.8 pounds, you can easily carry the machine for room to room air purifying. At less than 150, you will get an Oxygen Plus filter technology capable of turning toxic smog and ozone into pure oxygen. Additionally, the Ionic purification with germicidal chamber sanitizes 99.9% of airborne irritants and odors. Powering the filtration is an easy-to-clean front-loading collection blade with 3 fan speeds and a clean filter indicator. Take note that Envion Ionic Pro Turbo is not completely filter-free. There is a "forever" permanent filter that is washable and reusable to help you save a lot of money in the long run.

LightAir IonFlow 2.0

A fan-free, award-winning ionic filterless air purifier that is too expensive to recommend. LightAir IonFlow's transparent base and discreet light body are sleek yet without giving up on its functionality. Whether you go with LightAir IonFlow 2.0 Signature, Style, Evolution, Surface, or Solution, all models come with the same IonFlow technology. A scientifically proven evolutionary technology can effectively remove all types of nanoparticles below 0.1 microns without a filter. By generating 50 billion electrons per second, the transformed negative ions will attract other ions in the air. Hazardous pollutants like smoke, bacteria, influenza virus, and pet allergen will be attracted to the charged collector leaving the air clean and healthy. No ozone is produced, and the entire purification is silent at less than 5 dB. It is also environmentally friendly since the energy usage is only 7 watts per hour. The cheaper IonFlow 2.0 Evolution and Style will set you back around $479 with 540 sq. ft. coverage. The top-of-the-line signature will be at $549 with 650 sq. ft. coverage. The main drawback is the reduced effectiveness against larger particles between 1.0 to 25.0 microns; thus, the collector plate will fill up quickly.

IonPacific ionbox 20m

A flagship negative ion generator from IonPacific that does not use any filter to provide clean, fresh air. At only 6.1 x 4.4 x 2 inches and 4.8 ounces weight, this lightweight IonPacific ionbox 20m air cleaner is ideal for home use and the workplace. The versatile form factor allows you to effortlessly bring it for travel and plug it into a 110V/220V power socket or standard USB outlet. Right at the core, the breakthrough ionizing technology emits up to 20 million negative ions per second. Negative ions are natural phenomena that are safe, tested, and backed by many scientific studies. Compared with other small ionizers in the market, ionbox 20m patented ionizers can output 10 to 20 times more ions. Even with the strong power output, the multi-power supply is very energy-efficient, running at a low 1.5 watts. The only setback is the selling price; you will have to pay 2-3 times more than other filterless ionizers. Still, it is a one-time fee with zero maintenance or expensive filter replacement to think about.

What Is Filterless Air Purifiers? How Does It Work?

A filterless air purifier is a device that cleans the air efficiently using ionization, UV light, or Thermodynamic technology (heat) rather than relying on mechanical filters. Depending on the technology, a filter-free air purifier can remove a wide range of airborne particles like dust, pet dander, mold spore, pollen, bacteria, and viruses. It can also remove foul odors from cooking, pets, cigarette, and chemical fumes like VOCs, radon, ammonia, asbestos, benzene, and formaldehyde. It mirrors a conventional HEPA-filtered air purifier without its bulkiness and running costs. You will breathe better, live healthier, and suffer fewer allergy symptoms.

Not all air purifiers need filters to clean the air. Some models are better-priced, while some are more effective or energy-efficient. Here are 6 types of air cleaners work differently to ensure you breathe clean, healthy air. One of those is the forbidden fruit that you should never go for.

  • Electrostatic precipitator - Remove pollutants in the air by inducing high-voltage electrostatic charges. The Electrostatically charged negative ions will merge with positive ion particles causing them to fall due to the increased weight. A collector plate will accumulate the dropped particles for easy cleaning.
  • Ionization – Like electrostatic precipitators, ionizers generate negative ions that neutralize pollutants without an additional collector plate. You will need to vacuum, sweep, and mop the house to remove the fallen particles.
  • Thermodynamic sterilization - Similar concept to boiling water that kills 99.9% of microorganisms and germs through high temperatures.
  • Ultraviolet UV cleaner - Sterilization method that uses UV-C rays to damage the molecular structure of microorganisms. The allergens are obliterated inside the device; therefore, no cleaning is needed.
  • Photocatalytic oxidation - AKA Photocatalyst or PCO machine developed by NASA. PCO accelerates the natural decomposition of pollutants into harmless compounds. Through the process of photocatalytic, the broad-spectrum UV light will react to titanium dioxide resulting in oxidization. Photocatalyst is 100% safe, and will eliminate bacteria and viruses, but the efficiency will degrade over time.
  • Ozone generator - The forbidden one we talked about. Ozone generator works by emitting millions of hazardous ozone into the air. It splits oxygen molecules (O2) into single atoms and eliminates any contaminants in between. The single atoms will merge with other oxygen molecules to form ozone (O3). An ozone generator will mask strong odors but is harmful to our bodies. Inhaling ozone can lead to many side effects and respiratory problems.

What Are The Benefits of Filterless Air Purifiers?

There are many reasons to own a filter free air cleaning machine. Besides being capable of cleaning indoor air 24 hours a day, there are some perks that are only available in an air cleaner with no filter. To assist you in making an informed buying decision, here are the key benefits of why one should invest in a filterless air purifier.

Pros

  • Inexpensive - Most models are between $100-300, even for the top-tier model. You're only paying a one-time fee, and that's it.
  • No recurring filter cost - Since a filterless air purifier does not use filters, there are no additional costs to ponder on.
  • Consistent and reliable air purifying performance - With ionization or TSS heating technology, damaged filter, clogging issue, or dirty fan is non-existence.
  • Maintenance-free - Save you a lot of time and effort as no monthly filter cleaning is needed.
  • Energy-efficient - Most filterless air purifiers use only half the energy of equivalent filtered air purifiers.
  • Noiseless operation - You can work or sleep uninterruptedly with the filterless air purifier running non-stop.
  • Sleek, compact, and lightweight - Achievable due to the omission of filter and built-in motor fan.
  • Easy operation - Most filterless air cleaner works straight out of the box with one-touch operation. No complicated controls.
  • Safe to use - Does not emit harmful particles. Suitable for newborns, toddlers, children, elderly, and people with a compromised immune system.

Cons

  • Limited options - There are not many options to choose from compared with HEPA air purifiers.
  • Single filtration - Most filterless air purifiers use a single filtration that is pale in comparison to multiple filtrations found in a HEPA air purifier. Multi-level filter air purifiers can cover a broader range of airborne pollutants.
  • Weaker performance - In general, filterless air purifiers are less effective than an air purifier with a True HEPA filter in dealing with microscopic particles, smoke, and odor.
  • Smaller coverage - Filterless air purifiers will typically cover small to medium room sizes of air purifying. A stark contrast to filter-based air purifiers that cover a much wider area with higher ACH.
  • Limited recognition – Due to the nature of filterless purification technologies, only filter air purifiers are certified by the Association of Home Appliance Manufacturers (AHAM).
Do Filterless Air Purifiers Work

Is It OK To Leave A Filter-free Air Purifier On All The Time?

Regardless of the variant, filterless air purifiers are designed to run 24 hours a day without the need to shut down. It prevents airborne contaminants like dust, bacteria, and viruses from building up. Most filterless air purifiers are energy-efficient with a low running cost that increases your monthly electrical bill only by a couple of dollars.

filter

Filter VS Filterless Air Purifiers: Which To Pick?

In general, there are 2 main categories of air purifiers: Filterless and filter. Filterless air cleaners are active that use a single filtration to eliminate bad air. Filter air purifiers are passive that use multiple filtrations to cleanse the air. Both have distinctive differences, pros, and cons that you should know before making a purchase. Here are the advantages of getting a filterless over a filter-enabled air purifier.

You should buy a filterless air purifier if you want clean air at a more accessible price range with no periodic filter cost. You enjoy the hassle-free, zero-fuss ownership of a no-filter air purifier that requires zero maintenance. A mechanical air cleaner will require regular filter maintenance as it is prone to dust and dirt. You also value the complete silent operation compared with filter-based air cleaners that generate lots of noise from the spinning fan. Last but not least, you have limited interior space that requires a slimmer body to fit in your room.

A filterless air purifier may not be for you if you want a wider room size purifying coverage of up to 4,000 square feet. If you have severe allergies or breathing problems like asthma, conventional filter-enabled air purifiers are the way to go due to their superior filtration performance. A HEPA filter is more effective in dealing with fine particles, and a carbon filter is better in removing smoke and odors.

In conclusion, getting a filterless air purifier has its advantages and disadvantages. A filterless air purifier's pros outweigh the cons if you don't need the absolute best filtration.

FeaturesAirfree Onix 3000
Filterless Air Purifier

Filter Air Purifier
PricingStarting from $40Starting from $60
Noiseless OperationYesNo
Energy-efficientYesDepends
Zero MaintenanceYesNo
Ozone SafeYes (Except for ozone generator)Yes
FiltrationSingle (Active)Multiple (Passive)
Asthmatic SufferersSuitableSuitable
Kill Bacteria and VirusYesNo
One-touch OperationYesNo
AvailabilityLimitedPlenty
Advanced HEPA filtrationNoYes

Will Heat Sterilization Increase The Room Temperature?

Heat sterilization will not heat up the room temperature despite performing the sterilization at around 250°F (121°C) to 270°F (132°C) degrees. The heated air will cool down inside the core before releasing clean air. The device might feel warm when touched, but in no way will the heat be transferred out. Nevertheless, you should keep it away from children's reach.

How Do I Choose A Filter Free Air Purifier Based On My Room Size?

Choose a model with a coverage area equal to or exceeding the square footage of your room size. For example, if you need the device to work in a 300 square feet room, pick a model that can cover at least 300 square feet of space. Since filterless air cleaners are not under AHAM CADR, you will need to rely on the official figures from the manufacturer.

To calculate your room size in square footage, just multiply the length and the width of the room. E.g. length 20 feet x width 20 feet = 400 square feet.

Are Filterless Air Purifiers Safe?

Filterless air purifiers are ozone-safe certified by California Air Resources Board (CARB). It does not release ozone or other harmful byproducts to clean the air like an ozone generator. Just turn on the device, go on with your day and let the machine silently perform the air cleaning. You can safely use it around babies, children, and pets, providing it is not an ozone generator. Even Airfree models with thermodynamic sterilization (heat) are safe for home use and will not cause burn damage.

Is Ionization And UV-C Light Safe?

Ionization, UV-C light is safe to use and will post no threats to human health risk. It is a proven technology used for decades commercially and residentially. UV device uses ultraviolet rays to safely kill bacteria and viruses inside the chamber. One should void direct exposure to UV-C light as it can damage skin cells. Ionizer produces natural negative ions to remove airborne irritants. Most people often confuse an ionizer with an ozone generator, a different set of technology. A true ionizer does not generate ozone to "purify" the air.

Why Filterless Air Purifier Does Not Conduct ACH Or CADR Ratings?

Both ACH and CADR are only applicable to air cleaners with a filter and fan to draw air. Filterless air purifier technology relies on heat, ultraviolet light, or ionizers to purify the air. CADR (Clean Air Delivery Rate) measures the volume of clean air in CFM (cubic feet per minute) at a fixed room size. 3 tests will be conducted separately for dust, pollen, and smoke ratings. It does not measure how many microorganisms have been killed in the process; thus, no CADR ratings will be given. ACPH or ACH is the abbreviation for Air Changes per Hour. A metric measures how many times the air purifier exchanged the air from a space.

Does Filterless Air Purifier Remove Odor?

Air purifier without filter does remove odors from mold, pets, toilet, cooking, and chemicals like tobacco smoke, cleaning agents, VOCs, CO. It is less effective than a carbon filter that can absorb all types of smoke particles and odors via chemical adsorption. If your home is plagued with a musty, obnoxious smell all year round, there's no harm trying it out.

Is It OK To Leave A Filterless Air Purifier On All Night?

Yes, it is OK to leave a filterless air purifier on all night during sleep; as long as it is not an ozone generator. Most filterless air cleaners requires 24 hours of continuous operation anyway to be truly effective. If you turn off the device, dirty air will slowly build up and causes indoor air quality to drop.

Where Should I Place A Filterless Air Purifier?

Given most filterless air purifiers are catered for small to medium room sizes, you should place them as close to the pollution sources as possible. If the filterless air purifier is big in size, you should put it near the doorway to maximize inflow and outflow air circulation. If it is a small filterless air purifier, place it on the table, top cabinet, or island table about 3 to 5 feet from the floor. Whichever location you place it, leave 2-4 feet of space away from a wall. Avoid placing it in the corner, wet bathroom, underneath a window/ windowsill, or near electronic devices like a television or microwave.

How Long Will A Filterless Air Purifier Last?

Filterless air purifiers are estimated to last 10,000 hours or 2-5 years, depending on how often you run the device. However, top-quality brands like Airfree, Air Oasis, GermGuardian have no problem lasting more than 5 years.

How Much Energy Does A Filterless Air Purifier Use?

In general, a filterless air purifier will only use 10-30 watts of electricity, depending on the technology (heat, ionization, UV). The monthly electric bill per unit will be no more than 5 dollars, even if you run it 24 hours a day. A stark contrast to a refrigerator or air conditioner that uses thousands of watts of electricity per day.

How To Use A Filterless Air Purifier Effectively?

A filterless air purifier is unique on its own, as it requires less care than a filtered air purifier. That said, one can practice these simple steps to ensure you use the filter-free air cleaner correctly and effectively.

  • There's no need to turn it off - Air purifiers must run continuously to be effective. When it stops, airborne pollutants will build up and causes indoor air quality to drop.
  • Replace any non-washable filters/ light bulbs - Some filterless air purifiers have optional filters that can enhance the filtration performance. Always have them replaced promptly, or don't use them at all.
  • Close to the pollution sources - That way, you do not have to run the air purifier at maximum speed. Remember to leave 2-4 feet of space for the air ventilation to avoid obstructing the airflow distribution.
  • Close all windows and doors - An air purifier will only work well in an enclosed room free from outdoor pollutants. By leaving windows open, unfiltered air will enter, pushing the clean air out.

Final Thoughts

Filterless air purifiers are good at removing pollutants and cleaning the air. There is no arguing about the adaptive, cost-saving, and maintenance-free perks. Still, filterless air cleaners are not the jack of all trades. It is incomparable to a filter HEPA air purifier in terms of effectiveness. If you understand what you're getting at, go with the latest GermGuardian GG1100 for its budget UV profile. The same goes with Clarifion Negative Ion Generator GL-139 for its affordable plug-in setup. Airfree Lotus is the pinnacle of the list if you want the best air cleaning performance with absolute zero filters. Since you're here, why not check out our best permanent and washable HEPA air purifiers that have the best of both worlds.

Compare Best Filterless Air Purifier

NoImageAir PurifierOnline Price (Amazon)ScoreFiltrationCoverageFan
Speed
DimensionWeightDust CADRPollen CADRSmoke CADRPre-filterHEPA filterCarbon filterIonizerUV lightOther filterAll-in-one filterNoise levelPower outputTimer/ SchedulerSensorsWarrantyAuto modeRemote controlChild lockENERGY STARWi-Fi/ BTBluetoothAQIFilter indicator
1GermGuardian GG1100 Elite ReviewGermGuardian GG1100W/ GG1100B Air Purifier

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3.81-stage56 sq. ft. (5 m2)1
6.75 x 6.75 x 3.5 in
(17.1 x 17.1 x 8.9 cm)
0.7 lb (0.3 kg)N/AN/AN/A
-
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LB1000 UV-C Replacement Bulb
6-12 months+- 14.99
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SILENT1 year
2Clarifion Negative Ion Generator GL-139 ReviewClarifion Negative Ion Generator GL-139 Air Purifier

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3.61-stage150 sq. ft. (14 m2)1
4 x 6 x 2.9 in
(10.2 x 15.2 x 7.4 cm)
0.3 lb (0.1 kg)N/AN/AN/A
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Negative Ion Generator
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Ultra Quiet<1 W1 year
3Airfree Lotus Filterless Air Purifier ReviewAirfree Lotus Air Purifier

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4.21-stage650 sq. ft. (60 m2)1
7.7 x 13 x 7.7 in
(19.6 x 33 x 19.6 cm)
3.3 lb (1.5 kg)N/AN/AN/A
-
-
-
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-
-
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SILENT52 W2 years
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4.11-stage300 sq. ft. (28 m2)2
6.9 x 18.7 x 6 in
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9 lb (4.1 kg)
-
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+- 139
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SILENT60 W2 years
5GermGuardian GG1000 Pluggable Air Purifier & Sanitizer ReviewGermGuardian GG1000 Pluggable Air Purifier

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3.81-stage56 sq. ft. (5 m2)1
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1.13 lb (0.5 kg)N/AN/AN/A
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6-12 months+- 14.99
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SILENT3.5 W1 year
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4.21-stage650 sq. ft. (60 m2)1
8.4 x 10.4 x 8.4 in
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3.3 lb (1.5 kg)N/AN/AN/A
-
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4.13-stage300 sq. ft. (28 m2)1
4 x 14.1 x 4 in
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6 lb (2.7 kg)
-
-
-
1000G3 AHPCO-4G3 Replacement Cell
2 years
+- 90
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30 dB15 WLifetime