Best Filterless Air Purifier

6 Best Filterless Air Purifier In 2020 (No Filter Change Ever!)

Depending on what angle you look at a filterless air purifier. It can be an eco-friendly machine that will save you 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. There are some that even argue on the usefulness as there is no filter involved. To help you search for the best models according to your needs, we have conducted hours of research, comparison, and reviews. Whatever takes you have, we're here to rebut on the negative aspects and lead you to a whole new perspective on what the best no filter air purifier can do.

Who is this for?

A person that wants to stay healthy by breathing in clean air. Busy parents that do not want to be tied down with another home appliance. Homeowners or bachelor who are tired of cleaning air filters. An asthmatic or hyperallergic person that is constantly sick due to dirty air. Newborn, baby, and children will developing immune system. Lastly, anyone that is still confused whether should he/ she go with a filterless air purifier needs to read our reviews below.

Best Filterless Air Purifier Without Any Filter

How Do We Measure?
The "permanent" filtration First and foremost, the device must be filter free so any filters that require replacing will not be in this list. Next, the main filtration can be reused over and over again without expiring. As such, Ionizer, UV-light, Electrostatic precipitator, heat sterilization, and Photocatalytic oxidation will all be considered except 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 of the irritants, the more consideration weight we will place on the models.
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 plays a key role here. The only "must" criteria is the noise level has to be silent throughout the entire operation.
Selling price Since filter replacement cost is nil. The selling price is a critical factor in deciding is this the "right" one. No point buying an expensive air purifying device that does not work or take years to recuperate. We will also judge the unit worthiness compared with a classic HEPA air cleaner.

You can't have a filter free air purifier without introducing a plug-in air sanitizer. GermGuardian GG1100 Elite is the updated version to the popular GG1000 and now it comes with 2 colors (black & white). At less than 40 dollars, it is very accessible that everyone could afford one. The simplistic design is nicely balanced up with a LED circle ring that lets you know the UV sanitizer is working. With no complicated controls to operate, just plug GG1100 Elite into a wall socket and you are good to go. There's even a USB port where you can charge other devices while it is still sanitizing the air. Unlike a HEPA filter that heavily relies on a fan, UV-C light filtration is noiseless and uses very little electricity with a 3.5 Watt bulb. We have few units installed at home and barely notice GG1100 Elite existence while it's quietly performing the air cleaning. You can safely leave it running the whole day when you're away on a trip.

Let's look into GermGuardian GG1100 Elite specification:

  • Purifying Technology - UV-C light with Titanium Dioxide
  • Dimension (W x H x D) - 6.75 x 6.75 x 3.5 in
  • Weight - 0.7 lb
  • Coverage Area - 56 sq. ft.
  • Noise level - Silent
  • Warranty - 1 year

Unlike a conventional air purifier that is bulky with multi sets of filtration, GG1100 Elite relies solely on UV-C light with titanium dioxide. A century-old technology that uses short-wavelength UV-C to kill bacteria and viruses within minutes. When microorganisms are drawn into the chamber, the spectrum ultraviolet light will penetrate the protective wall and alter the germs' DNA. The titanium dioxide act as a disinfectant that decomposes microorganisms via photocatalysis. The join purification process will continue until all irritants and odors-causing cells are destroyed. Being a pluggable unit that does not take up any interior space, GermGuardian GG1100 Elite is great at removing bacteria, viruses, and mild household odors. We highly recommend placing a no filter air purifier in the bathroom than relying on an air freshener.

At 6.75 x 6.75 x 3.5 inches and 0.7 pounds, GermGuardian GG1100 Elite fits perfectly in a handbag or luggage during travel. Standard 120V/ 60Hz power voltage is practical and easy to set up where you can plug in into most power socket. The filter free setup means there is no messy filter washing or replacing. You only have to bear with the 15 to 30 dollars running costs as the UV lightbulb requires replacing every 6-12 months. While GermGuardian GG1100 Elite takes up very little space as it is pluggable, there are some trade-offs to consider. GG1100 has a small 56 square feet coverage that you have to place it close to the pollutant sources e.g. next to the litter box, toilet bowl, or ventilation. Being a filter-free air purifier, the filtration depth is very restricted so do not expect similar quality as a HEPA filter. If you understand the limitations, there's is absolutely no doubt this UV sanitizer will work well as it is intended.

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

MRSP/ RSP**
± 59.99 p
     Annual filter ^    
± 15 - 30 p
 Online price*
Latest Amazon price

The older version to GG1100 with the exact same functionality. GermGuardian GG1000 Pluggable UV-C Sanitizer is many people's favorite go-to air purifier without filter. It is small, affordable, and very easy to use without any controls. At 3.2 x 7.5 x 3 inches in size and a mere 0.7 lb in weight, you will have no issue plugging it to any type of power socket. Just leave it close to the contaminant sources and the UV-C sanitizer will quietly clean the air. You don't even have to worry about the electricity bill as GermGuardian GG1000 uses less energy than a standard lightbulb. Out test units have been running for months and there are zero spikes on the electricity bills. 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.

Let's see what makes GermGuardian GG1000 ticks.

  • Purifying Technology - UV-C light with Titanium Dioxide
  • Dimension (W x H x D) - 3.2 x 7.5 x 3 in
  • Weight - 1.13 lb
  • Coverage Area - 56 sq. ft.
  • Noise level - Silent
  • Warranty - 1 year

Like GG1000, GermGuardian GG1000 is powered by the safe and ozone-free ultraviolet light technology with titanium dioxide. When exposed, the short-wavelength UV-C light destroys nucleic acids and disrupting microbes' DNA. Supporting Titanium dioxide (TiO2) will further disinfect the microorganisms effectively killing it or causes it to be inactive. Bacteria, viruses, musty mold, smelly toilet, and even diapers will be eliminated by the ultraviolet light for good. Being a pluggable unit, GermGuardian GG1000 is very flexible with the placement. You can literally use it anyway as you please as long as it has a power source. Perfect for tight spaces like toilet, kitchen, laundry room, and walk-in wardrobe.

There are two downsides you do have to take note. First, the very limited purifying coverage (less than 60 square feet) means this is not a direct substitute for an air cleaner. Second, it is less effective against dust, hair, and other large airborne particles. Other than that, GermGuardian GG1000 is pretty much worry-free and maintenance-free. No cleaning is needed as there is no filter inside. Simply replace the UV-C light bulb when it reaches its 5,000 expected lifespans. We recommend changing the 3.5 watt lightbulb every 6 to 12 months as the performance will degrade over time. So 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, compact, and wall pluggable room sanitizer with UV-C light technology. Capable of eliminating close range germs and household odors.

MRSP/ RSP**
± 39.99 p
     Annual filter ^    
± 15 - 30 p
 Online price*
Latest Amazon price

Airfree Lotus is our favorite no filter air purifier in this list. That's right, this filter-free air cleaner comes with a unique space that resemblance of a beautiful Lotus flower. At 7.7 x 13 x 7.7 in dimension and 3.3 pounds, Airfree Lotus is very small and operates silently since there is no huge fan involved. For comparison, a typical mechanical air cleaner is 2 times as bulky and heavy. Between the lines, there are up to 10 multi-color night light that surely one will tickle your fancy. Perfect for home decor or a family that has children sleeping in their own room. The adjustable nightlight will give them an added sense of security and help them navigate through the dark.

Below is the highlight of Airfree Lotus specification:

  • Purifying Technology - Thermodynamic TSS Technology
  • Dimension (W x H x D) - 7.7 x 13 x 7.7 in
  • Weight - 3.3 lb
  • Coverage Area - 650 sq. ft.
  • Noise level - Silent
  • Warranty - 2 years

Patented Thermodynamic TSS Purification Technology is a purification method that relies on heat to kill germs. By drawing air into its chamber, Airfree Lotus will boil up the air to 400°F, effectively killing 99.99% of microorganisms in the process like pet dander, pollen, mold, dust mites, odors, bacteria, and viruses. When the air is completely purified, clean air will be cool down internally and release back out at normal room temperature. After 24 hours of non-stop operation, Airfree Lotus can cover room space up to 650 square feet. You will be continuously breathing into fresh air so long the machine is kept on.

There are other perks of Airfree Lotus besides being a filterless air purifier. It is very economical as there is no filter change or washing needed. Operating the air cleaner is also very straightforward. Switch it on and the machine will automatically clean the air. Perhaps the most critical factor of all, there is no ozone emission as Thermodynamic TSS technology is certified on its safeness. There are some minor complaints mainly it does not capture dust or any large particles quickly enough. To ensure consistent performance, Airfree Lotus must be turned on at all times but thankfully the 52 watts electricity is still manageable. It is also rather pricey in this list. Lastly, the machine does feel warm when operating for long hours but not to the extent of causing any burn damage. You can use it around children or pets without having to worry that the device will topple over.

In short: A reliable, filter-free air purifier that can kill mold and germs silently while you sleep. Without turning it off, it can support up to 650 sq. ft. of room size.

MRSP/ RSP**
± 399 p
     Annual filter ^    
± 0 p
 Online price*
Latest Amazon price

The cheapest, no fancy design, cylinder shape air cleaner that costs less than 100 (after discount). Unlike the above models, there is nothing special about Airfree T800 other than its compressed size. It does not have a nightlight, has a small 180 square feet purifying coverage, and can topple easily. Why are we featuring it then? Simple. The water heating Thermodynamic TSS Technology is still here. The same filtration that can be found in other more expensive Airfree models.

Here is the key specification of Airfree T800.

  • Purifying Technology - Thermodynamic TSS Technology
  • Dimension (W x H x D) - 6.1 x 12 x 6.1 in
  • Weight - 1.5 lb
  • Coverage Area - 180 sq. ft.
  • Noise level - Silent
  • Warranty - 2 years

Unlike a mechanical filter that traps airborne irritants, Airfree T800 can eliminate allergens permanently through the heat like boiling water. When contaminants are drawn inside the core, the inner mini-ducts heats the air over 400°F, effectively eradicating any allergens and odors in the machine leaving only cool, clean air out. The purification process will also reduce ozone in the air by 26% according to an independent lab test in Sweden. You should experience a surreal difference in air quality after running for a couple of hours. Being half the price of most Airfree models, you can get more than 1 unit and place it in a different location for more comprehensive room coverage. Airfree T800 is proven to be safe, maintenance-free, and eco-friendly from its filter-free setup. You will save a lot of time and money in the long-run.

Airfree T800 downside is also its upside. Having a super slim body allows air purification without the use of any filter. Being an air purifier without filter, it can clean the air silently in the background without emitting any harmful toxic. Ideal for night use where you can place it next to your bed. While it might not be as effective as a conventional HEPA filter, it is very cost-efficient that uses very little electricity at 33 watts. Best of all, T800 will kill germs, bacteria, and viruses similarly as its big brother would. What else could you ask for more?

In short: The smallest, lightest, and most portable Airfree air cleaner. It is also the most affordable Thermodynamic TSS here but comes with a smaller coverage and dated design.

MRSP/ RSP**
± 159 p
     Annual filter ^    
± 0 p
 Online price*
Latest Amazon price

The only pluggable, ionizer air purifier without a filter in the list. Clarifion GL-139 Negative Ion Generator is a 100% maintenance-free with no recurring cost. Just pay for the one-off fee and you can reuse it again and again without fail. There are no replacement parts needed for the purification. As for the usability, Clarifion GL-139 is a plug and play model so no complicated controls to worry about. You can easily tell if the negative ion generator is working with the glowing blue LED light. The ionization cycle is ultra quiet and uses very little electricity (less than 1 watt) even if you are running it all day every day. The zero noise output is perfect for air quality improvement in the baby room, workstation, kitchen, or bathroom.

Here's the key specification of Clarifion GL-139:

  • Purifying Technology - Negative Ion Generator
  • Dimension (W x H x D) - 4 x 6 x 2.9 in
  • Weight - 4.8 lb
  • Coverage Area - < 54 sq. ft.
  • Noise level - Silent
  • Warranty - 1 year

No surprise here. Clarifion GL-139 focuses solely on ionization technology that will disperse up to 10 Million pcs/cm^3 of Negative Ion-Output. A 100% ozone-free and safe technology that is totally different from an ozone generator. By leaving the no filter air purifier running anonymously, millions of negative ions will be diffused into the air. The charged ions will then merge with nearby positive ions particle contaminants. The increased weight causes the airborne contaminants to drop, leaving the air free of pollutants. You will then have to perform vacuuming to clean out the fallen particles. Otherwise, the fallen particles will stick to the wall, sofa, table, floor until it is cleaned or stirs back up in the air.

At a small 4 inches width and 6 inches in height, GL-139 fitts steadily well on homes with an old type wall socket. Adding the 4.8 lb lightweight, you could bring the ionizer during trips and plug it in a hotel or guest room. So what's the drawback about Clarifion GL-139 Negative Ion Generator? Like all pluggable air cleaner with a tiny form factor, it can only purify up to 54 square feet of space. Ionizer technically doesn't remove any airborne contaminants in the room and is also not the best against smoke and odors. If those are your concern, a UV sanitizer will probably suit you better.

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

MRSP/ RSP**
± 39.99 p
     Annual filter ^    
± 0 p
 Online price*
Latest Amazon price

Onix 3000 is a beautiful, black housing air purifier without filter that unmistakenly an Airfree. Comes in a compact bullet head design that has a diameter of 8.4 inches and a height of 10.4 inches. From the odd shape, you can tell that no filter is equipped in the filtration. This gives Onix 3000 the added advantage of not having to replace or maintain the filters. You can place it on top of a cabinet or table for days without being too obtrusive. Just turn it on and let the TSS Technology slowly and quietly purifying the air. Unlike air fresheners that mask away from the unpleasant smell, Airfree Onix 3000 can get rid of foul odors coming from allergens.

Let us look into Airfree Onix 3000 specification:

  • Purifying Technology - Patented Thermodynamic TSS Technology
  • Dimension (W x H x D) - 8.4 x 10.4 x 8.4 in
  • Weight - 3.3 lb
  • Coverage Area - 650 sq. ft.
  • Noise level - Silent
  • Warranty - 2 years

Like the above Airfree models, Airfree Onix 3000 uses Thermodynamic TSS Technology applies the concept of boiling water. When airborne particles are pulled inside TSS ceramic core through natural convection, the mini-ducts will heat up the air over 400 degrees Fahrenheit. The exceedingly high temperature will eliminate 99.99% microscopic allergens like mold, pollen, bacteria, and viruses that cannot withstand the heat. The now purified air will be cool down for a couple of minutes and distribute out silently at room temperature. Take note that the unit can get hot after running for a few hours, it will not increase the room temperature in any way. This slow purification process is safe, proven, and without releasing toxic ozone gases that can trigger asthma and destroy tissue cells in the lungs. In fact, Airfree Onix 3000 can even reduce ozone by 26% as tested in Sweden's laboratories.

There's a lot of similarities between Airfree Onix 3000 with Lotus like the no filter purification, one-button operation, 650 sq. ft. capacity, and nightlight (Lotus comes with more colors though). Great for bedroom use as you can barely hear anything coming from the air purifier. The nightlight brightness level is adjustable so it will not be too glaringly bright during night time. Power consumption is at 52 watts that is somewhat efficient given it is a device that uses a heating element. Performance-wise, it's no HEPA grade but that's the beauty of it. It is a filter-free air purifier so no costly filter replacement ever. If you don't mind the slow purification that would take days to cover an entire room, there are other mirroring models e.g. Iris 3000, P3000, P2000.

In short: No filter needed air purifier with zero noise output and supports up to 650 square footage of room space. No filter change or maintenance needed.

MRSP/ RSP**
± 299 p
     Annual filter ^    
± 0 p
 Online price*
Latest Amazon price
** MRSP (Manufacturer's Suggested Retail Price)/ RSP (Retail selling price) is provided by cleanairprice.com. 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.

2020 Best Filterless Air Purifier Without Any Filter

Air PurifierOnline Price (Amazon)TechnologyFiltrationCoverageScore
GermGuardian GG1100W/ GG1100B Air Purifier

$$$

CHECK PRICE
UV-C Light1-stage56 sq. ft. (5 m2)5.4
GermGuardian GG1000 Pluggable Air Purifier

$$$

CHECK PRICE
UV-C Light1-stage56 sq. ft. (5 m2)5.4
Airfree Lotus Air Purifier

$$$$

CHECK PRICE
Thermodynamic TSS1-stage650 sq. ft. (60 m2)7.6
Airfree T800 Air Purifier

$$

CHECK PRICE
Thermodynamic TSS1-stage180 sq. ft. (17 m2)6.2
Clarifion GL-139 Air Purifier

$$$

CHECK PRICE
Negative Ion Generator1-stage<54 sq. ft. (5 m2)5.4
Airfree Onix 3000 Air Purifier

$$$$

CHECK PRICE
Thermodynamic TSS1-stage650 sq. ft. (60 m2)7.8
BACK TO TABLE

 

Additional Information

How Does A Filterless Air Purifier Works

As the name implied, a filter free air cleaner will purify the air without relying on any filter. Very different from filter-based air cleaners that clean the polluted air through a series of mechanical filters. Depends on the technology, a filter-free air purifier can cover a wide range of indoor pollutants like a normal HEPA filter would. There are 6 types of air cleaners that will work differently to ensure you are breathing into 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 ions particles causing it to fall due to the increased weight. A collector plate will accumulate the dropped particles for easy cleaning.
  • Ionization – Like electrostatic precipitators, generated negative ions that cause particles to sink but without an additional collector plate. You will still need to vacuum, sweep, and mop the house.
  • Thermodynamic sterilization - aka heat sterilization. Similar concept as boiling water that kills 99.9% of microorganisms and germs through heat. The sterilization process end with only normal temperature air released back out.
  • Heat sterilization – Destroy germs and other microorganisms through high temperatures. The purified air is cooled down and released back into the room.
  • Ultraviolet UV cleaner - Uses UV-C rays from a light bulb to damage the DNA and molecular structure of microorganisms. The allergens are obliterated inside the device therefore no cleaning is needed.
  • Photocatalytic oxidation - AKA Photocatalyst or PCO machine. PCO accelerates the natural decomposition of pollutants into harmless compounds. Through the process of photocatalytic, a broad-spectrum UV light will react to titanium dioxide resulting in oxidization. Photocatalyst is 100% safe, will eliminate bacteria and viruses, but the efficiency will degrade over time.
  • Ozone generator - This is the forbidden one we talked about. Ozone generator works by emitting millions of hazardous ozone in the air. It split oxygen molecules (O2) into single atoms, eliminating any contaminants in between. The single atoms will merge with other oxygen molecules to form ozone (O3). Ozone generator will neutralize strong odor but is harmful to our body. Inhaling to 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 purifier. Besides having the efficiency to clean 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.

  • Affordable price range even for the top tier model.
  • No recurring cost as it does not use any filters.
  • Consistent and reliable air purifying performance.
  • No maintenance or vacuuming needed.
  • Energy-efficient where it uses very little electricity.
  • Noiseless operation due to the lack of fan.
  • Sleek, compact, and lightweight body.
  • Very easy to operate with simple controls.
  • Safe to use around children.

Is It Safe To Leave A Filter Free Air Purifier On All The Time?

A filterless air purifier is perfectly safe to run 24 hours a day without shutting down. It is designed to do so to prevent airborne contaminants like dust, bacteria, and viruses from building up when it is off. Just turn on the device, go on with your day and let the machine do the air cleaning.

Are Filterless Air Purifiers Safe To Use Around Children And Pets?

A filterless air purifier is safe to use around babies, children, and pets providing it is not an ozone generator. Even models like Airfree that uses thermodynamic sterilization (heat) will not cause any burn damage. Most models are very compact too so there is less hazard risk of the device from accidentally topple and knock on the little one.

Filter VS Filterless Air Purifiers: Which To Pick?

There are key differences between the two that you should know before making a purchase.

Here are the advantages of getting a filterless over a filter-enabled air purifier.

  • Cheaper with only a one-time fee as there is no filter to replace. Compared with a HEPA air cleaner that cost hundreds of dollars with high recurring costs depending on the number of filtration.
  • Easy to use and requires zero maintenance as you could leave it unattended to eliminate bad air. A mechanical air cleaner will require regular filter change as it is prone to dust and dirt on the filter. For air purifiers that come with a washable filter, you will need to remove the filter for cleaning regularly which can be time consuming.
  • Zero noise operation compared with filter-based air cleaners that generate lots of noise from the spinning fan.
  • Sleeker design than the filter-based counterpart as it does not have to incorporate filters in their body.

Here are the disadvantages of getting a filterless over a filter-enabled air purifier.

  • Limited pool of options for a filterless compared with the vast selection of filter-based models.
  • In general, filter-enabled air cleaners can support a much wider room size all the way up to 4,000 square feet. This is due to the physicality of the HEPA filter and a larger motor fan.
  • Most models are certified by AHAM with extra features like timer, auto mode, air quality indicator, and remote control.
  • No filter air cleaners are active and use a single filtration to eliminate bad air. Mechanical air purifiers are passive and use multiple filtrations to pull air inside its chamber to cleanse the air.
  • Conventional filter-enabled models have better overall filtration performance. A HEPA filter is more effective in dealing with fine particles while a carbon filter is better in removing smoke and odors. A HEPA air cleaner is the best option for all those who suffer from severe allergies, breathing problems like asthma.

In conclusion, a filterless air purifiers pros outweigh the cons and is a better choice if you don't need the absolute best filtration.

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. This is because the heated air will be cool down within the core before releasing clean air out. The device might feel warm when touched, but in no way the heat will be transferred out. You might want to keep it away from children reach.

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

Choose a model with the recommended coverage equal or exceed 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 ratings, 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.

Do Filterless Air Purifier Release Ozone?

Filterless air purifiers will not release ozone unless you account for an ozone generator. Ozone generator or Ozonator is a device that produces ozone that is harmful to our health especially our lungs. It breaks apart oxygen molecules in the air into single atoms, then merges with other oxygen molecules to form ozone. Because ozone is an unstable compound, it can react badly with other toxic chemicals found in a household like VOCs, cigarette smoke. None of the filter-free air cleaners listed here is ozone generator as we do not advocate owning one.

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 that has been used for decades commercially and residentially. Ionizer produces natural negative ions to remove airborne irritants. UV device uses ultraviolet rays to safely kill bacteria and viruses inside the chamber. Most people will confuse ionizer as an ozone generator which is a totally 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?

Most filterless air purifier technology relies on heat, ultraviolet light, or ionizer to purify the air thus it is not designed to be rated with CADR or ACH. Both tests are only applicable to air cleaners with a mechanical filter and fan to draw air in. It does not measure how many microorganisms that have been removed or killed in the process. CADR or Clean Air Delivery Rate measures the volume of clean air in CFM (cubic feet per minute) at fixed room size. 3 tests will be conducted separately for different ratings: dust, pollen, and smoke. ACPH or ACH is the abbreviation for Air Changes per Hour. A metric that 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 however, less effective than a mechanical carbon filter that can handle even the finest smoke particles. If your home is plagued with a musty, obnoxious smell all-year-round, there's no harm trying it out.

What To Look For In a Filterless Air Purifier

There are not many 100% filter free air cleaners in the market. Most models come in a hybrid form that has at least one reusable filter. If you 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 on a product, the better decision you will make.

  • Filtration performance - Correlate with the percentage of airborne particles like dust, mold, pollen, germs, bacteria, and viruses can be eliminated. As not all air cleaners come with the same filtration quality, pick a model that offers a minimum of 99% of particle removal.
  • Coverage area - The greater the coverage, the more clean air an air cleaner can distribute. Knowing the room size you need will make a big difference. Some models can only cater to a small space while others can cover up more than 1,000 square feet. For example, if you intend to place the device in a 300 sq. ft. room space, measure the room size, and pick a model that can handle at least the minimum range.
  • Purifying technologies - A good determining factor on which model you should go for. Choose from ultraviolet light, negative ion generators, or Thermodynamic TSS Purification Technology. The technology chosen plays a major role in determining how will the indoor air be purified.
  • Dimension - If you are staying in a very limited room space area, 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 it into the wall or bring it around for travel.
  • Noise output - One of the perks of owning a filter-free air cleaner. The best filterless air purifier is noiseless thus will not distract you from sleep or work. Ideal for workspace, bedroom, nursery room, or anywhere you need your mind to stay focus on. Pick the model that has a noise level of less than 20 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. Any air purifying device you pick will have little impact on the electricity bills. 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 1-year warranty. The longer the period, the better assurance you will get from the manufacturer. Even though filter free air cleaners rarely break down, 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 does the warranty cover. Pay close attention to brands with notoriously bad track records.
  • Other features - In order to stand out among the crowd, most manufacturers will add extra features to improve on the usability of their product. Depending on your lifestyle, features like a night light, timer, LCD display, or mood light is worth ponder upon if you don't mind the increase in pricing.