6 Best Filterless Air Purifiers For Minimal Maintenance

Holly Curell

Written By

Holly Curell

Expert Reviewed By

Josh Mitchell

Last Updated On

“If you make a purchase using our provided links, we may receive a commission. Learn more here.

Those struggling with poor indoor air quality usually consider investing in an air purifier as a first step.

Filterless air purifiers are especially popular for their low-maintenance operation, so this is an amazing option to reduce small airborne pollutants within your home.[1]

In this guide, I’ll cover everything you need to know before buying a filterless purifier, including the best filterless air purifiers on the market right now.

Quick Glance - My Recommendations

AIRFREE P3000 Filterless Silent Air Purifier...

AIRFREE P3000

Editor’s Choice

GermGuardian GG1000 Small Air Purifier,...

GermGuardian GG1000

Best For Small Spaces

Ivation Ozone Generator Air Purifier, Ionizer...

Ivation 300B

Recommended for Large Rooms

6 Best Filterless Air Purifiers For a Cleaner Home

1. AIRFREE P3000 Filterless

4.8

Overall Score


Energy Efficiency

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Cleaning Ability

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

4.5

Current Progress
Current Progress
Current Progress
Current Progress

Who is the AIRFREE P3000 best for?

The AIRFREE P3000 is best for homeowners looking to target germs and dust simultaneously.

Pros
  • Completely silent
  • Patented filtration technology
  • Stylish, compact design
  • Large coverage area
  • Soothing anti-stress light
  • 2-year warranty
CONS
  • Struggles to capture large matter
  • High price tag

Airfree is a well-known name in the air purification world.

The company’s filterless line of products, including the popular P3000, requires no filter, fan, or humidifier to operate effectively.

Compared to other air purifiers, this one uses thermodynamic TSS core technology to kill pathogens, deactivate harmful particles, and remove odors.

It's arguably the best filterless air purifier, especially if you struggle with dust in your home like I do.

AIRFREE P3000 Filterless technology

One thing I love about this model is its silent operation. Since it has no fan, it's absolutely silent.

It's so quiet, in fact, that I had to check that the unit was operating after plugging it in and turning it on.

Another great feature of the P3000 is its portability. Even though it can cover up to 650 square feet, it's small enough for travel, and you can easily move it from room to room.

Don't believe me? Well, just look at the dimensions and weight; this powerful machine weighs just 3.5 pounds and stands 10.4" tall.

If you’re worried about harmful byproducts, you can rest easy with this machine. It uses heat sterilization to deactivate particles, so there is no ozone or ion production.

Best of all, this unit might even improve your home’s safety by removing some ozone from the surrounding air.

Unfortunately, this isn’t the most budget-friendly option on the market, but it does make up for that with its 2-year warranty.

If you’re looking for something cheaper with similar capabilities and design features, I suggest the P2000 model instead.

Feature

Details

Coverage Area

650 sq ft

Filtration Technology Used

Thermodynamic TSS Core Technology

Electricity Consumption

240 watts

Noise Level

0 dB

Particle Removal Rate

99%


2. GermGuardian GG1000

4.7

Overall Score


Energy Efficiency

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Cleaning Ability

4.25

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Who is the GermGuardian GG1000 best for?

The GermGuardian GG1000 is best for those looking to purify a small space of up to 100 sq ft.

Pros
  • 7” plug-in perfect for small spaces
  • 1-year warranty
  • No filter replacement and low-cost
  • Great for removing odors and germs
CONS
  • Not as quiet as advertised
  • Requires UV light replacement

Unlike the Airfree P3000, the GermGuardian GG1000 purifier isn't designed for larger rooms.

Still, not everyone needs to purify a large space, in which case you might consider choosing this model over other purifiers.

The GG1000 is an effective plug-in device that measures just 7" tall. It costs less than $30 and is great for a small kitchen, bathroom, laundry room, mud room, or nursery.
GermGuardian GG1000 kitchen

It’s particularly helpful for removing odors, which is why I use this near my cat’s litter box! I also have a second unit that sits on my nightstand.

Just like many other air purifiers using filterless technology, this one turns to ultraviolet light to kill germs and airborne viruses.

It’s been tested for killing influenza, staph, and rhinovirus, and it passed these tests with flying colors.

Because it's such a small device, you can count on the GG1000 to be energy efficient.

While it won't work in large spaces, it has high-performance ratings for rooms up to 100 square feet and only needs replacing once a year.

After browsing the thousands of positive reviews, then testing it out in my kitchen, it’s easy to feel confident after buying this small piece of technology.

Feature

Details

Coverage Area

<100 sq ft

Filtration Technology Used

UV-C Light

Electricity Consumption

<1 watt

Noise Level

40 dB

Particle Removal Rate

456 cubic feet of air per hour


3. Ivation 300B

4.5

Overall Score


Energy Efficiency

4.25

Current Progress
Current Progress
Current Progress
Current Progress

Cleaning Ability

4.5

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Who is the Ivation 300B best for?

The Ivation 300B is best for people who seek to purify a large space, such as a basement or even an open-plan apartment.

Pros
  • Ideal for large spaces
  • Sleek cherry wood finish
  • Easy operation
  • Capable of dust removal
CONS
  • Does not meet CARB requirements
  • Bulky design

Only a few HEPA air purifier devices or even filterless purifiers can handle massive spaces, which has been the biggest hurdle in my search.[2]

That’s not the case for the Ivation 300B. I’ve awarded this the best purification option for large rooms, all thanks to its massive coverage area of 3,500 square feet.

The 300B technology uses powerful ion technology to clean air within a home.

It works by releasing negative ions into the air, which then neutralize impurities, including smoke, odor, and common allergens. I found that it works quickly, too.

Ivation 300B anions

For having such a massive coverage area, I'm surprised by the affordable price tag.

Compared to the Airfree P3000, it can handle about double the square footage but costs about half as much.

Unfortunately, this isn’t the most energy-efficient device, which is why it cannot be shipped to California - it doesn’t meet the state’s CARB-certified requirements.

Overall, though, the Ivation 300B is perfect if you’re seeking a solution for basements, garages, or another large space.

Feature

Details

Coverage Area

3500 sq ft

Filtration Technology Used

Ionization/Ozone

Electricity Consumption

240 watts

Noise Level

Not listed

Particle Removal Rate

20 million negative ions/second


4. Airfree T800 Filterless

4.4

Overall Score


Energy Efficiency

4.5

Current Progress
Current Progress
Current Progress
Current Progress

Cleaning Ability

4.25

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

4.5

Current Progress
Current Progress
Current Progress
Current Progress

Who is the Airfree T800 best for?

The Airfree T800 is an ideal choice for average-sized bedrooms measuring up to 180 square feet.

Pros
  • Small yet powerful
  • Requires no filter, fan, or humidifier
  • Ideal for average-sized bedrooms
  • Great value for money
  • 2-year AirFree warranty
CONS
  • Not as powerful as other AirFree models
  • Gives off a small amount of heat

Similar to other air purifiers from Airfree, including the P3000, this one uses the company’s patented thermodynamic TSS technology for cleaning air.

The technology utilizes heat to remove allergy-causing organisms, including mold, dust mites, bacteria, and dander.[3]

Airfree T800 Filterless technology

The innovative technology isn't the only thing to love about the T800.

Other top features include the machine's silent operation, energy efficiency, compact sleek design, 2-year warranty, and, best of all, affordable price tag.

I don’t really have anything bad to say about the T800. My only worry is that this device isn’t effective for anything over 180 square feet.

If you plan on using this in a master bedroom or larger living space, I highly suggest checking room size measurements before you buy.

Feature

Details

Coverage Area

180 sq ft

Filtration Technology Used

Thermodynamic TSS Core Technology

Electricity Consumption

120 watts

Noise Level

0 dB

Particle Removal Rate

99%


5. Clarifion Air Ionizers

4.3

Overall Score


Energy Efficiency

4.5

Current Progress
Current Progress
Current Progress
Current Progress

Cleaning Ability

4.25

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

4.25

Current Progress
Current Progress
Current Progress
Current Progress

Who is the Clarifion Air Ionizer best for?

This Clarifion Air Ionizer small air purifier is best for consumers looking to purify a very small area on a budget.

Pros
  • Most affordable purification option
  • Very low power usage
  • No installation required - just plug it in!
  • Helps with asthma and allergies
CONS
  • Very small coverage area
  • Shorter lifespan than others

For consumers on a tight budget, spending hundreds on a new purification machine probably isn't in the cards.

Luckily, there are plenty of affordable devices available, including the popular Clarifion Air Ionizers.

A 3-pack of these plug-in ionizer devices costs just over $100. Depending on how often you use it, each ionizer can last for an entire year.
Clarifion Air Ionizers plug-in

That’s only about $33 for a full year of clean air, and best of all, you don’t have to worry about any additional costs to replace new filters.

Unlike electrostatic precipitators or UV air purifiers, this one works by sending out negative ions.

These ions then attach to and neutralize the air particles, working to kill bacteria and other particulate pollution in your home.

Because this is such a small device, my only complaint is the small coverage area.

Compared to large HEPA filters, you’ll only notice a difference if you use this in a very small room, like a closet, bathroom, or laundry room.

Feature

Details

Coverage Area

<100 sq ft

Filtration Technology Used

Ionization

Electricity Consumption

<1 watt

Noise Level

1 dB

Particle Removal Rate

99%


6. HomeZens Air Purifier

4.1

Overall Score


Energy Efficiency

4.0

Current Progress
Current Progress
Current Progress
Current Progress

Cleaning Ability

4.0

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

4.25

Current Progress
Current Progress
Current Progress
Current Progress

Who is the HomeZens Air Purifier best for?

The HomeZens is best for users looking to target a small space with UV purification via a standard outlet.

Pros
  • Safe enough for pets and children
  • Easy-to-use plug-in design
  • Soothing blue light emitted
  • Ideal for killing germs and bacteria
CONS
  • Noise level output is higher than others
  • Replacement UV-C bulbs needed

So far, I’ve covered a few solid plug-in air purifiers, including the Clarifion Air Ionizer and the Germ Guardian GG1000.

Both are great options, but if you’re specifically looking for a plug-in purifier that doesn’t require filters, I suggest this product from HomeZens.

HomeZens specializes in UV purification. The UV-C light sterilization technology has been rated to remove up to 99% of airborne bacteria, and it can kill bacteria responsible for E. coli, staph, and salmonella.

Because it eliminates common bacteria that are harmful to newborns, many new parents use this as a nursery air purifier.

Whether you plug it into a nursery outlet or use it in a bathroom, hallway, or stairwell, most consumers are pleased with its results.

My only complaint is the slightly high noise level of 45 decibels.

That’s because it uses a small fan to pull each harmful particle into the vacuum chamber, where the particles are then purified by the UV light.

HomeZens Air Purifier vacuum chamber
All in all, the HomeZens purifier is an excellent choice for small rooms, and it only requires a 120V electricity outlet to start working immediately.

Just know that you don’t need to buy new filters, but you should purchase a replacement UV-C bulb every 6 to 8 months.

Feature

Details

Coverage Area

110 sq ft

Filtration Technology Used

UV-C Light

Electricity Consumption

<1 watt

Noise Level

45 dB

Particle Removal Rate

99.9%


Comparing Filterless Air Purifier Models

Preview

Name

Rating

Filter Type

Removal Rate

Price

AIRFREE P3000 Filterless Silent Air Purifier...

AIRFREE P3000 Filterless

4.8

Thermodynamic TSS Core Technology

99%

GermGuardian GG1000 Small Air Purifier,...

GermGuardian GG1000

4.7

UV-C Light

456 cubic feet of air per hour

Ivation Ozone Generator Air Purifier, Ionizer...

Ivation 300B

4.5

Ionization/Ozone

20 million negative ions/second

AirFree T800 Filterless Silent Air Purifier...

Airfree T800 Filterless

4.4

Thermodynamic TSS Core Technology

99%

Clarifion - Air Ionizers for Home (3 Pack),...

Clarifion Air Ionizers

4.3

Ionization

99%

HOMEZENS Portable Plug in Air Purifier for...

HomeZens Air Purifier

4.1

UV-C Light

99.9%

Beginner’s Guide When Buying A Filterless Air Purifier

It's a common misconception that all air purifiers work the same.

Sure, an air purifier is designed to reduce the percentage of airborne allergens, pollutants, and pathogens.

That doesn't mean every air purifier is capable of delivering on that promise, though.

That’s why you MUST know what to look for when buying an air purifier.

Below, I’ve covered all the main considerations for purchasing a model that will actually boost indoor air quality.

Types Of Filterless Air Purifiers Available

First and foremost, it's essential to understand the different types of filterless air purification. There are several types to choose from, each with its own pros and cons.

  1. 1
    Electrostatic Precipitators:
    This type of purification is highly efficient for removing dust particles from the surrounding air. It does this by using high-voltage electrostatic precipitators, or charges. The charged plates within the device attract dust, pollen, pet hair, and more.
  2. 2
    Ozone-Based Purifiers:
    Ozone purifiers use ozone or another combination of oxidizers to clean the air. These are completely filter-free and work best for removing microorganisms like mold and mildew.
  3. 3
    Ultraviolet Purifiers:
    Ultraviolet purification turns to ultraviolet light to literally obliterate microorganisms in the surrounding environment. The ultraviolet rays are more than capable of killing bacteria, germs, viruses, mold, and mildew. Still, it's not ideal for larger particles like dust and pet hair.
  4. 4
    Ionization Purifiers:
    Ionizers within the device release ions into the surrounding air, which neutralize unwanted pollutants and particles.
  5. 5
    PCO Purifiers:
    PCO technology, short for photocatalytic oxidation, typically uses titanium dioxide combined with UV rays to chemically alter the surrounding air particles
types of air purifiers

TL;DR: There are many different types of filterless air purifiers. Some use UV rays, other ionize the air. It is recommended that you stay away from ozone-base purifiers.

Coverage Area The Corresponding CADR Rating

Every air purifier is rated to handle a certain amount of space.

According to the Association of Home Appliance Manufacturers, AHAM for short, you have to look at the CADR rating of your purifier to know how much area it can cover.[4]

AHAM says that the CADR, short for Clean Air Delivery Rate, should be at least ⅔ of the room size.
CADR Rating

So, if you want to purify the air in a 120-square-foot bedroom, look for a device with a CADR of at least 80.

ACLAB Note:

The worse the air quality in your area, the higher the CADR rating is recommended.

Unfortunately, CADR is only geared towards filtered models and replacement filters.

For that reason, you aren’t likely to find this rating on a filterless model, so just be sure to look for a specific coverage area on the packaging.

For instance, the Airfree P3000 clearly shows that the device can handle spaces up to 650 square feet.

On the other hand, the small GG1000 plug-in devices are only ideal for 100 square feet or less.

Filterless Air Purifier Coverrage Area

TL;DR: Usually the cleaning ability of an air purifier is judged by the CADR rating, however, for filterless air purifiers this is not used. Instead, for filterless air purifiers check that it covers the specific coverage area of your space.

Percentage Of Eliminated Airborne Particles

Because there is no air filter used in this type of purifier, it’s hard to get an exact percentage of what you can expect from airborne particle elimination.

The exact number ultimately comes down to the type of purification method used, like UV, ionization, etc.

Some products, like the HomeZens plug-in, will tell you exactly what to expect for elimination and what exactly will be eliminated.

In this case, HomeZens markets this product with a 99% elimination rating for common germs responsible for E. coli, strep, staph, and salmonella.

TL;DR: With filterless air purifiers, it is hard to judge what percentage of pathogens are eliminated unless it is specified by a reputable brand.

Noise Levels (Decibels) Can Vary

Many filterless air purifiers can remove particles from the air without the use of a fan. For this reason, you can expect nearly silent operation from your filter-free purifier.

Of course, there are some exceptions. Some of these devices require a small fan to draw in air particles, specifically those that use UV light purification.

However, you won't find this true for ionization purifiers like the Clarifion Air Ionizers.

If noise is a major concern for you, I suggest going with either an ionization purifier or an Airfree model that uses its own patented thermodynamic TSS core technology, like the Airfree P3000.

Filterless Air Purifier Noise Level

TL;DR: Filterless air purifiers are generally quiet since most do not have a fan. There are exceptions though.

Unit Price & Running Costs

Price is a common concern among homeowners. While we shouldn’t have to pay for access to clean air, it’s unfortunately the world we live in nowadays.

Luckily, you don’t have to clear out your bank account or max out your credit card to improve the quality of the air around you.

The best filter-free purifiers range anywhere from $25 to $300+, so it’s up to you to set your budget and buy accordingly.

how much electricity do air purifiers use

More good news is that these devices don’t cost much to run, especially the small plug-in purifiers.

Unless you purchase a massive machine that requires extremely high wattage, you’re not very likely to see a spike in your utility bill.

TL;DR: Filterless air purifiers are priced based on their features and coverage area. Most are affordable both to procure and to run since they do not use much electricity.

Get a Model With Long Warranty Period

Generally speaking, more expensive purifiers come with longer warranty periods. Take the Airfree P3000 as an example.

This is the most expensive product on the list, and it comes with a longer-than-average 2-year warranty.

Typically, you can expect this type of home appliance to come with a 1-year warranty policy, like the GermGuardian GG1000.


How We Review & Rank Our Product List

At Air Conditioner Lab, our team follows a similar process when evaluating all products reviews before formulating our final lists for readers.

We begin by gathering data sources directly from brands, e-commerce platforms, online retailers and press releases.

These are then added to a master file we use to compare features specifications from all Air Purifier models. You can access this Air Purifier Sheet Here.

Next, we narrow down all the products on the market by evaluating user reviews, ratings and feedback from a wide variety of online and in-person sources.

Our team then discusses and co-ordinates our first hand experiences using these products, as well as gather independent opinions and feedback through Youtube and customer reviews.

Why Use A Filterless Air Purifier? (Benefits Explained)

There are tons of benefits to using a filterless air purifier rather than a filtered model, including:

  • Require much less maintenance than filtered air purifiers
  • No need to factor in filter replacement costs
  • Ideal for killing small microorganisms, like germs, bacteria, and viruses
  • Can alleviate allergy and asthma symptoms
  • More affordable than they used to be

ACLAB Note

While filterless purifiers are great for certain pollutants, specifically tiny microorganisms, they’re not as ideal for large particles like dust, pollen, and pet hair. For that you need air purifiers with HEPA and carbon filters. However, they are much more capable of killing germs and neutralizing odors.

Also you can find air purifiers with washable filters so you do not have to worry about the cost or replacement filters.

Both types - filtered and filterless - have pros and cons. If you want to make the most of your air purification system, you might consider investing in both types!


Common Questions

How Do Filterless Air Purifiers Work Exactly?

Filterless air purifiers work differently based on the method of purification used. There are several different types of filterless purifiers, each using a different medium.

Based on the one you choose, your purifier could operate using ozone, UV light, ionization, heat, or even electrostatic energy.

Are Filterless Air Purifiers As Safe As Filtered Ones?

Yes, filterless air purifiers are just as safe as filtered ones. But that doesn’t mean you should go poking around within the device. Components like UV lights, oxidizers, and ionization panels are tucked safely within the purifier for a reason!

How Do You Clean A Filterless Air Purifier?

The best way to clean your filterless air purifier is to remove dust buildup from the intake/output areas regularly. You can do this with a small cleaning brush or a microfiber towel.

Why Don’t Filterless Air Purifiers Conduct ACH or CADR ratings?

ACH and CADR ratings are specifically used to rate the filtration system of an air purifier. 

Since a filterless device doesn’t actually have a filter, there’s no need to provide ACH or CADR ratings for these products.

How Long Will A Filterless Air Purifier Last?

The lifespan of a filterless air purifier can range anywhere from 1 year to 5 years. The lifespan depends on a few things, but it mostly has to do with the quality of the product.

Generally speaking, cheap filterless models will last about 1 year, whereas more expensive devices can work for up to 5 years.

So, Which Do I Recommend?

Needless to say, we all want to have access to clean air.

Thanks to air purifiers, this is more than possible, and filterless models make it easier than ever to choose a purifier that’s virtually maintenance-free.

Airfree P3000 is the best choice overall, especially if budget isn’t a major concern.

Unfortunately, we can’t all spend hundreds on our clean air needs. If this applies to you, I suggest the more budget-friendly Clarion Air Ionizers.

My #1 Recommendation
AIRFREE P3000

  • Completely silent
  • Patented filtration technology
  • Stylish, compact design
  • Large coverage area
  • Soothing anti-stress light
  • 2-year warranty

References: 

  1. https://www.epa.gov/indoor-air-quality-iaq/improving-indoor-air-quality
  2. https://www.epa.gov/indoor-air-quality-iaq/what-hepa-filter
  3. https://www.mayoclinic.org/diseases-conditions/allergies/symptoms-causes/syc-20351497
  4. https://www.aham.org/
Was This Article Helpful?
YesNo

Holly Curell

Writer & Editor

Holly Curell
Holly is an experienced writer and editor who specializes in technical manuals, and safe and efficient home appliances. When she’s not writing, Holly enjoys reading, hiking, and the odd glass of wine.

My Favorite Home Appliance?

Lasko Bladeless Tower Heater

See Our Editorial Processes

Meet Our Team

Share Feedback

Read the latest from Holly Curell

: