Best Air Purifier Without Filters

Why are you hunting around for the best air purifier without filters? It’s because using the best filterless air purifier eliminates buying pricey replacement HEPA-type or True HEPA filters altogether. And buying filters all the time sucks. Wouldn’t it be nice to have an air purifier that does the job without ever stopping just because the filters got all clogged up?

Good news! The vast air filtration market actually offers a few pretty decent filterless air purifiers. However, there aren’t many effective air purifiers like that. That’s why I put together these 3 best filterless air purifier reviews. Forgive me because all the products I’ve reviewed here are from the same brand, Airfree air purifiers.


Note: I’m not talking about air purifiers with washable filters here. Rather, I’m talking about totally filterless air filtration devices. With these air purifiers, you’ll NEVER, EVER need to buy replacement filters of any kind. You’ll likely save a small heap of cash, but are filterless air purifiers really worth it? Find out a little later down the road.


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3 Best Air Purifiers Without Filters



1. Airfree Iris 3000

2. Airfree T800 Filter-free Air Purifier

3. Airfree P1000 Filterless

Let’s jump right in and see what these 3 filterless air purifiers look like.

1. Airfree Iris 3000 (Easily Kills Bacteria and Viruses)


Editor’s Rating: 3.5 out of 5 stars (3.5 / 5)


The 3.3 lbs Airfree Iris 3000 looks like a smooth black dome that’d add elegance to a space. Thanks to its Thermodynamic TSS technology, it can purify up to 650 square feet. More on purification coverage down the road. But 650 sq. ft. is stretching it too far. This machine won’t clean 650 sq. ft. well. Use it in a much smaller room. I’d suggest 400 sq. ft. or smaller.

But how does the Airfree Iris 3000 work? The technology uses heat to kill harmful micro-organisms. It’s pretty much like boiling. Unlike UV light air purifiers that shine ultraviolet rays upon bacteria and viruses, it “boils” them to death — at 400°F. It’s a natural way to get rid of harmful micro-organisms. Also, setting it up is incredibly easy. Simply plug it in and start enjoying purified air. In a small room, you should notice a difference in a couple hours.

How does the Airfree Iris 3000 draw in dirty air since it has no fan? Untreated air enters the device at the bottom by convection. It then passes on to the machine’s patented ceramic core where it’s sterilized. Once sterilized, the air exits the unit via the top. Note: before the sterilized air comes out, it passes via a cooling process.

Many ISO 17025 labs based in Sweden, Germany, and the U.S have independently tested this air purifier. They’ve reported it delivers as per its specs. Actually, this is the most effective air purifier without physical filters I’ve seen. And it’s nearly 100 percent quiet. You probably should install one in your bedroom.

I must admit one thing, though. True HEPA air purifiers clean polluted indoor air better than all other types of air purifiers. That’s a fact. The downside of these air purifiers is that they use filters. Well, filters aren’t the most expensive products on Earth. However, you’ll buy them 1 to 4 times annually. You know what that means.

Although the Airfree Iris 3000 operates without HEPA filters or any other kind of filters, it works. It’s effective in terms of banishing a variety of air contaminates. It helps with eradicating pollen, pet dander, mold, and dust mites. It also helps kill bacteria and viruses. In addition, it helps deal with organic odors including tobacco smoke.

But what do Airfree air purifiers do with the contaminants they remove? I posed this question to Airfree. The company explained that Airfree purifiers convert these air pollutants into carbon dioxide. They also said that some of the “carbon ash” remains inside the device. I didn’t find these answers very satisfactory.  We want to breathe in oxygen-packed and not carbon-laden indoor air. C02 is a greenhouse gas, and such gases harm the environment.

Do Airfree air purifiers filter the air? No. But they purify it by killing contaminants using very high temperatures.

Does the Airfree Iris 3000 generate ozone, ions, or UV light? No. On the contrary, it removes up 26 percent of ozone from the air! Very few air purifiers eliminate micro-organic pollutants without releasing ozone. I see that as a BIG pro for this device.


  • Small & super light
  • Very little maintenance
  • Beautiful design
  • Doesn’t use filters
  • Removes viruses and bacteria
  • Decimates dust mites
  • Reduces 26% of ozone*
  • Super quiet
  • Independently tested in ISO 17025 labs
  • 10 colorful night lights
  • Low energy consumption
  • Black color contrasts lighter colors in the room


  • A bit pricey
  • Must be placed in a perfectly vertical position to work well
  • Multi-color night light too bright
  • Needs ample space around its base
  • No shutoff timer
  • Not good for tobacco odor
  • Can’t move it from room to room
  • Low ACH and won’t filter the air


Are these Cons a Dealbreaker?


Let’s see.

You can dim or even turn these multicolored lights off.

And when the device isn’t sitting in a perfectly upright position, you’ll know. Its lights keep blinking.

I also don’t like that there’s no auto shutoff timer. In fact, you must keep all Airfree air purifiers running the whole time. I asked the company why. They told me the device should run 24/7 if the user wants to reap all its benefits. That doesn’t sound like a very nice thing, does it? Fortunately, the unit isn’t a power guzzler. That’s probably because it has no fan.

Here’s one more thing I don’t like. You can’t move the Airfree Iris 3000 from one room to another. The manufacturer explained to me that moving it around “breaks the air cleaning cycle.” But what if you live in a home with several rooms and don’t own any other air purifier? Frankly, that’d be a deal breaker for me. However, that’d not be a problem if you live in a studio. Or just intend to clean only one room.

Even though the manufacturer says the purifier removes smoke, I’d not buy this for smoke removal. I don’t think it does a great job. The Honeywell HPA300 465 sq. ft. Allergen Remover would be a better fit if smoke is the main problem you have.

My Verdict: If you live in an area with high air pollution levels, this device isn’t the best option. When the Airfree Iris 3000 is running, it doesn’t feel like it’s moving much air.  The only way to know it’s actually working is to touch its top part. If it feels warm to touch, it’s working. Here’s a manual that carries more info about this air purifier.




The Airfree Iris 3000 offers a 2-year warranty. Not the longest warranty ever provided, but it’s not the shortest either. Just average.


2. Airfree T800 (Best for Micro-organic Pollutants)


Editor’s Rating: 3.5 out of 5 stars (3.5 / 5)


Compared to other filterless air purifiers, the Airfree T800 is considerably more affordable. White in color, it’s a small-room air purifier designed to treat the air up to 180 sq. ft. The device looks like a silo with a grille on top. It’s easy to knock this thing over, so, take care.

It’s amazingly quiet, too. But that’s because it has no fan. Like the Airfree Iris 3000, the Airfree T800 leverages the patented TSS ceramic core to sanitize the air. Pollutants get sterilized at 400°F. It doesn’t produce ozone, ions, or UV light. Dirty air gains entry into the unit near the base via natural convection.

This portable room air cleaner helps you decimate bacteria, viruses, and other micro-organisms. It’s designed to hep with pollution from tobacco smoke, pollen, pet dander, dust mites, mold, and organic allergens. Well, I’ve not used any Airfree air purifier. But based on the literature I’ve immersed myself in, I’d not say these claims are 100% convincing.

Well, I can see how subjecting bacteria, viruses, and dust mites under 400°F can obliterate them. But I fail to see how the same method should effectively kill pollen or pet dander.

But many users in different online places seem to love this unit. In fact, I found that Airfree air purifiers in general have drawn in truckloads of fans. I’ve seen countless Airfree T800 reviews where the authors praised said it helped them manage asthma and allergies. Well, that’s anecdotal evidence, and anecdotal evidence is what it is.

At just 1.7 lbs, this is probably the lightest air purifier I’ve ever reviewed. And with a height of just 12 inches, it’s not bulky. How much energy does the unit consume? About 33 watts. Having it won’t balloon your electric bills.

What’s the difference between the Airfree Iris 3000 and the Airfree T800? The latter is considerably cheaper and lighter. Plus, it cleans a much smaller area. Also, the Airfree T800 consumes less power than its sibling. Here’s one more difference. The Airfree Iris 3000 features adjustable multicolored night lights while the T800 doesn’t.



  • Attractive price
  • Deactivates viruses and bacteria
  • Kills dust mites and mold
  • Small and easy to move
  • A low energy consumer
  • White: blends well with other colors
  • No filters needed


  • Doesn’t actually filter the air
  • Not very effective for stated coverage
  • Not good for handling smoke
  • Smell noticeable when new
  • Low ACH
  • Easy to topple


If you’ve used an air purifier that uses filters, you might think this filterless air purifier isn’t working. But it works. Touch the top of the “silo,” and if it feels warm, know your machine is doing the job.

Also, I’m not sure this device will effectively clean up to 180 square feet. It seems to be most effective for much smaller spaces. I’d choose this for a very small bedroom, say 10″ x 10.” And if you smoke indoors (maybe you shouldn’t), buy a different air purifier. The Airfree T800 isn’t great at reducing tobacco smoke.

Why am I recommending this air purifier? It’s because it’s cheap and doesn’t use filters. It’s also because it kills bacteria, viruses, and dust mites, and molds. Finally, it’s because it runs silently unlike air purifiers that use a filter (s).

Users have detected an odor when they first set up their device. But this is typically manufacturing odor. And it usually vanishes after a couple hours.

Some users have noticed a change in their air hours after installing this unit. But the effects may not be as strong as would be the case with a HEPA air purifier. For the price, this product is good enough. But I’d not describe it as an air purification workhorse.




2-year warranty

3. Airfree P1000 (Most Suitable for Bacteria, Viruses, Mold, and Dust Mites)


Editor’s Rating: 3.5 out of 5 stars (3.5 / 5)


The Airfree P1000 looks pretty much like the Airfree P2000. In fact, their dimensions and weight are the same. But there are differences. The Airfree Platinum 2000 should clean 550 sq. ft. while the Airfree P1000 should handle 450 sq. ft. max. Also, the P2000 is silver in color while the P1000 is white.

Another difference is that  the Airfree P1000 consumes slightly less energy than its sibling. And as you might expect, the P2000 costs more than the P1000. You’d think that the P2000 costs more because it works better, but that’s not the case. I’d choose the P1000 over P2000 any day even if the prices were equal.  But in terms of design and build, these two air purifiers are identical twins.

It’s also noteworthy that the Airfree P1000 is CARB-certified. That certification clearly indicates that the device is approved for use in California. California is very serious when it comes to all things health. The state has set stringent standards to guide what products companies can sell there.

This filterless air purifier has its maker’s famous Thermodynamic TSS technology to thank for its effectiveness. It heats the air that enters it by convection up to a temperature of 400°F. No bacteria can survive such temperatures. In fact, you need just 212°F to decimate bacteria. Will 400°F kill viruses?  No. However, any temperature above 212°F deactivates viruses.

Finally, this air purifier offers adjustable night lights. Simply select the color you prefer and hit the sack. Don’t need any light? Well, just turn it off.


  • Operates super quietly
  • Design aesthetically pleasing
  • CARB-certified
  • No filters to replace or wash
  • Very easy to install
  • Adjustable night light


  • Doesn’t filter the air
  • Won’t clean stated area effectively
  • Must use it in one room

Let’s look at the cons more closely.


The manufacturer states that the device treats areas extending up to 450 sq. ft. But I doubt it’s that powerful. I’d use it to clean a room much smaller than 450 sq. ft., maybe 300 sq. ft. or thereabout. Also, if you’re grappling with odors and smoke, find a different option.

Unfortunately, you can’t move the to different rooms. You must position it in a particular room and leave it there. Plus, you must leave it running throughout the day if you crave great results. I don’t like this.

However, I like that this air purifier is small and light. I also appreciate that it annihilates bacteria and deactivates viruses. That said, I’d recommend the Airfree P1000 for spaces that need basic or light cleaning. For heavy air scrubbing, hunt down a heavy-duty machine such as the Honeywell HPA300



2 years


In my opinion, the Airfree P1000 is among the best air purifiers that work without needing expensive air filters. But is it the best filterless air purifier I’ve seen? Not really. The Ionic Pro Platinum (TA750) gets my vote.


What’s the Best Air Purifier Without Filters?


The Airfree Iris 3000 is the best filterless air purifier among these 3 picks in my opinion. But why do I say the Airfree Iris 3000 is the best option here? It’s because it’s the cutest of them all. It’s a beautiful black dome that’d effortlessly adorn any modern living room, bedroom, or baby nursery.

But I can’t see any other thing about the Airfree Iris 300 air purifier that makes it stick out. All 3 machines work the same; they use the exact same air filtration technology. The only real difference is the purification coverage each covers.

Honestly, none of these Airfree air purifiers is spectacular in terms of decimating germs and other air pollutants. But to be fair, they work. I mean, they start cleaning your indoor air as soon as you power them up.

Also, I like that all of them are environmentally friendly. You won’t ever need to buy replacement air filters. And that means less environmental pollution. That’s a really nice thing.

But you shouldn’t really expect any kind of air filtration miracles from these filterless air purifiers. These machines aren’t anything like True HEPA or even HEPA-type air purifiers. Unlike filter-based air cleaning devices, these machines rely on air convection to pull in contaminated air and to release cleaned air. Compared to a motor, convection sure looks like a joke in terms of moving air. But these air purifiers do the job, albeit a little feebly.

If your level of indoor air pollution isn’t life-threatening, you can sure grab one of these filterless air purifiers. Otherwise, just bite the bullet and buy an air purifier that uses replaceable filters. Medify air purifiers, Airthereal air purifiers, and Levoit air purifiers are all examples of great True HEPA air purifiers.

Buy an Airfree air purifiers on Amazon now if you’re impressed by any of them. Or, grab yourself anything else you might like on Amazon. Thank you for stopping by. And if you have any thoughts you’d like to share with me, feel free to do so in the comments section here below. Again, THANK you.

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