Everyone has the right to breathe fresh air. However, for many people, fresh air is difficult to come by. Luckily, you can always ask for help. From whom? Well, from an air purifier, of course.

An air purifier is a great machine to get when you have an allergy and are sick of waking up in the morning with a stuffed nose. It’s also great when you’re tired of inhaling tobacco smoke or have pets that shed their fur and dander like no one’s business.

There are different types of air purifiers available on the market. In this article, we’re going to review the no-filter or filterless air purifiers only.

The followings are five of the best filterless air purifiers of 2018. We carefully pick them for you and divide them into three groups that signify the amount of space they cover. The grouping may seem simplistic, but area coverage is one of the first things people consider whenever they’re looking for an air cleaner.

Without further ado, here they are:

CategoryAir PurifierArea Coverage (sq. ft.)Dimensions 
MediumAirfree T8001805.1 x 5.1 x 12
LargeEnvion Ionic Pro Turbo5007.5 x 9.5 x 28.5
Lightair Evolution IonFlow 5054023 x 7 x 7
Airfree Onix 30006508.4 x 8.4 x 10.4
Extra LargeIvation Ozone Generator (Editor's Pick)3,50012.5 x 11 x 15

Best Filterless Air Purifier – Medium Space

Airfree T800

best filterless air purifiers

When you’re looking for the best filterless air purifier from medium-sized space, you go for the Airfree T800. The T800 is specially made to cater for rooms up to 180 square foot in size. This little unit works well in any room including air-conditioned ones.

The T800 measures 5.1 x 5.1 x 12 and weighs 1.5 pounds, making it ideal for desktop use. You can put it in your bedroom or take it to your office.

Contaminated air goes into the T800 by convection. Inside the unit, there’s hot ceramic tube reaching 400o Fahrenheit. All allergens, dust, bacteria, and pollens are incinerated inside it, leaving nothing but carbon dioxide and water.

filterless air purifier“Incinerated?!”

Yes, that’s how the T800 handles airborne microorganisms. Considering that it only takes 167o Fahrenheit to kill influenza virus, we can say running the T800 a pretty good safety measure during flu season.

Don’t worry, it doesn’t mean that this machine will heat up the room. Clean air goes into the cooling chamber before delivered back into the room. With the air impurities destroyed, you’ll have nothing but clean, cool, and odor-free air to breathe.

The only bad thing we can think of the T800 is the plastic smell coming out of it when you first plug it in. It’s nothing too nasty and it will disappear a couple hours after use.

What We Loved

  • Perfect for medium-sized rooms
  • Gets rid of air impurities easily
  • Doesn’t heat up the air

What We Didn’t Like

  • Smells a bit like plastic at first

Best Filterless Air Purifier – Large Space

Envion Ionic Pro Turbo

filterless air purifiers 2018

The Ionic Pro is sleek-looking air purifier that stands about three feet tall. It is rated for 500 square foot of living space. That said, it works so well, some people even rely on it to clean the air for the whole house.

There are low, medium, and high settings on this unit. We recommend setting it on high the first day you run it and then keep it on low to maintain air quality. On high, this unit gets rid of odor really quick. That’s a great thing when you have pets but don’t want your home to smell like them all the time.

filterless air purifiersThis no-filter air cleaner has a germicidal chamber that eliminates bacteria and germs. Note that there’s no pesticide of any sort involved here, so you won’t need to worry about any adverse health effects.

The Ionic Pro Turbo is also equipped with Oxygen Plus technology. It turns smog and ozone into pure oxygen giving you fresher air to breathe even when you’re living next to a busy freeway.

If you want to put this unit in the bedroom, we suggest you tape a piece of paper over the LED light. It’s too bright and may annoy you when you turn off the bedroom lights.

What We Loved

  • Sleek-looking
  • Very effective in removing bacteria, germs, dust, and odor
  • Works well in medium to large living space
  • Oxygen Plus technology

What We Didn’t Like

  • LED light is too bright

Lightair Evolution IonFlow 50

best filterless air purifier 2018

The IonFlow 50 is slim and fits anywhere. You can put it in a corner and it will sit there doing its job without anyone noticing. It is also very easy to set up. Just plug it in and it’s ready to go.

If you live next to a busy street, this will help get rid of dirt, dust, and exhaust fumes that find their way into your home. You’ll notice less dust on your furniture.

Of course, this means there’s going to be plenty of dust plus all kinds of nasty airborne particulates stuck to the collector. It’s no biggie since the collector is very easy to clean. Put it under running water for a while and dry it. That’s it.

filterless air purifier 2018“Is it good for removing odors?”

Of course. It does a great job at that as well. If you’ve just bought new furniture, for example, and you need to get rid of that pungent smell that usually comes with them, the IonFlow 50 will remove that bad odor immediately.

https://www.youtube.com/watch?v=b0PNWvVm1lc

What We Loved

  • Slim and stylish
  • Easy to clean
  • Great at removing dust, allergens, and odor

What We Didn’t Like

  • Some people report that it is not as effective as it seems

Airfree Onix 3000

best filterless air purifiers 2018

The Onix 3000 is designed to cover 650 square foot of space. Put it in the living room, plug it in, and it will provide your family with fresh air all day long. Hazardous bacteria, fungus, and virus are destroyed at high temperatures inside the Onix’s ceramic core.

Airfree says you need to run this unit for a week before you see the result. However, many people claim they already can see the result after a few hours. Airfree air purifier’s effectiveness is backed by multiple scientific tests and you can read all about the tests on their Airfree’s website.

The Onix is not just great at removing pollutants from the air you breathe but also great at eliminating odor. If you have pets or family members who smoke, you will love it very much.

https://www.youtube.com/watch?v=mbFHrlkS-v8

This unit is also perfect for the bedroom. It only measures 8.4 x 8.4 x 10.4 inches and weighs a mere 3.3 pounds. It will fit well on any bedside table. The Onix 3000 has an adjustable night light, making sure you stay comfortable while you’re sleeping.

One thing that’s not so good about this unit is that it gets warm. Not hot, just warm. If you’re the type who prefer to sleep in a cool room, put it somewhere a bit farther from you.

What We Loved

  • Aesthetically appealing
  • Small and lightweight
  • Gets rid of odor and pollutants effectively

What We Didn’t Like

  • Missing an on/off button

Best Filterless Air Purifier – Extra Large Space

Ivation Ozone Generator [EDITOR’S PICK]

top rated filterless air purifier

When you need just one air purifier for the whole house, the Ivation Ozone Generator is a compelling choice. A single unit is enough to purify the air in a 3,500 square foot of living space.

This unit is a combination of ionizer and ozone generator. The controls for these two are separated so you can freely adjust both parts according to your specific needs. The user manual covers everything you need to operate the controls. You can get it up and running in no time.

Even when you set the ozone generator on the lowest setting, you will notice that it’s very effective in cleaning the air in your home.

For most household, keep the ozone generator on the lowest setting and play with the ionizer dial as needed. For instance, when you need to deal with sudden influx weed pollens in the middle of September, crank up the ionizer to catch those nasty pollens.

best air purifier 2018Unlike many filterless air purifiers, this unit has a small fan in it. It only makes a soft whirring sound and should not pose a problem wherever you put it.

Now, there are many negative stigmas hovering around ionizer and ozone generator. Having both in a single unit should raise a red flag for many. However, this unit is safe to use if you follow the direction. The number one rule is to never use this in a closed room and put it up high about 4 to 5 feet from the floor.

https://www.youtube.com/watch?v=1AcSGs_CRjU

What We Loved

  • Very powerful in eliminating bad odors
  • Works well even in an extra-large space
  • User manual is easy to understand
  • Easy to clean

What We Didn’t Like

  • Should not be used in closed room

How Do Filterless Air Purifiers Remove Odor?

Filter air purifiers use activated charcoal or zeolites to trap odor-causing particles. However, filterless air cleaners remove odors by destroying the particulates that cause them. Tobacco smoke, mildew, and fungus are obliterated once they go through the machine.

That being said, the best course of action to take when dealing with bad odor is to tackle the source. For instance, if you have dogs and you don’t want your house to smell like dogs, you need to make sure that the dogs are properly taken care of. Frequent bath time is not enough and in some cases may make matters worse.

We suggest you watch the following video. It shows you 10 great tips to keep dog smell out of your house.

https://www.youtube.com/watch?v=rbSXTmhjZyg

It’s the same thing with bad smell from molds. A filterless air purifier can only prevent spores from spreading to other areas. You need to clean mold-infected surface as they will continuously make new spores.

Consult this handy guide on how to clean up mold in your home.

Why Pick A Filterless Air Purifier?

There are a number of reasons why people opt for a filterless air purifier over the filter ones. Let’s talk about four of those reasons here.

  1. No filter to replace

The biggest caveat of a filter air purifier is the filter itself. HEPA filters and various types of pre-filters don’t come cheap. When you buy an HEPA air purifier you need to take into account the cost of buying replacement filters over the years. With a filterless air purifier, there’s no such extra cost.

  1. Zero noise

Another problem with a filter air purifier is the noise coming from the fan. If the machine is placed in the bedroom, the noise can interrupt your sleep especially if you’re a light sleeper. A filterless air purifier requires no fan and is totally quiet.

The only exception is the Ivation Ozone Generator. It uses a small fan, but since it’s not meant to be used in a bedroom, it’s not even a problem.

  1. Very energy efficient

A filterless air purifier doesn’t need to power any fan. With less component to power, it eats way less electricity than its filtered counterparts.

Let us take the Lightair IonFlow for example. That thing only consumes 7 watts of electricity. That’s insanely low power. The Airfree T800, on the other hand, needs 33 watts. That’s about five times more power consumption than the IonFlow, but still much lower than what the average home appliances require.

Suffice to say that running a filterless air purifier all year round won’t spike up your electricity by much. That’s a relief if you have pollen allergy.

  1. Does not dry out the air

Some people using filter air purifier in their bedrooms complain about waking up with sore throats in the morning. A filterless air purifier delivers clean and cold air to its surrounding without significantly change the humidity. That means you never need to worry about any drop in humidity when running a filterless air purifier in your bedroom.

Filter Vs. Filterless Air Purifier – Which One’s Better?

This is a difficult question to answer. There are filter air purifiers that are very good at its job and some that are the complete opposite. It’s the same thing with the filterless ones. Not all of them are as good as what the manufacturers’ claim to be.

Filterless air purifiers also still have their downsides. You still need to clean the unit regularly to get rid of the dust sticking to dust collector part. Depending on how dirty your living space is, you may need to clean it once every two weeks or even once a week. You can use baby wipes or damp cloth to wipe the dust followed by paper towels to dry it.

And then, there’s the price.

You can easily find true HEPA air cleaners for less than 100 dollars. Filterless air purifiers, on the other hand, are mostly priced more than 100 dollars. The good thing is that the high initial investment is offset by the lack of filter replacement. In the long run, no-filter air cleaners still win the game.

“So, which one should I pick?”

Take your personal preference into account. If you absolutely despise replacing filters or can’t stand the noise that filter air purifiers make, then go with the filterless one.

You also need to take your family into consideration. If any of your family members is very sensitive to ozone or ionized air then you should stick with HEPA filter air cleaners. People who have a long history of breathing problems, lung disease, heart disease, asthma, or other respiratory diseases, should stay away from ozone generators and ionizers.

How Come Filterless Air Purifier Doesn’t Have ACH Rating?

ACH is short for Air Changes per Hour and signifies how many times per hour an air purifier can completely exchange the air in a room. This rating is made for filter-type air purifiers that use fans to suck in dirty air and blow out clean air.

A filterless air purifier doesn’t employ a fan. Dirty air goes into the unit by convection and the pollutants get annihilated using either electrostatic or extreme heat in the core.

Since the nature of filter and filterless air cleaners differ greatly, it doesn’t make sense to apply the same rating for both.