7 Best Filterless Air Purifier (No Filter Change!) in 2023

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. 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.

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.

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.

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. 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.

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.

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.

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. 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.

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.

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.

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.

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. 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 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.

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. 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.

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.

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.

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. 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.

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.

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.

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. 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.

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.

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.