Best Air Purifier Reviews of 2019

It is said that you can survive without food for a month, without water for a week, but without air for just only a few minutes. Air is a natural resource; we do not have to build a factory to produce air.

However, clean air is another story. In the time of polluted cities exceed the unpolluted ones, fresh air is some rare thing that everyone is looking for.

Knowing the importance of fresh air, I am listing some of the best air purifier reviews on the market and criteria on how to choose the best one.

Top Ten Best Air Purifiers

Of course, there is no such thing called “best for all”. These top 10 best air purifiers are selected base on various aspects. However, I am sure that all products in the table below are worth considering, one way or another.


How to Choose The Best Air Purifier?

As you can see, all ten products on this list have the HEPA filter; some have the UV light, a few have the ionize setting. So are you curious what are those technologies, are they really good or are there any other kinds of air purifier apart from that? On the other hands, what are criteria you need to focus on when consider buying a best air purifier? Here is a buying guide that helps you pick the right air purifier you need.

Common Types of Air Purifier


There are four types of air purifiers that are most preferred on the market; those are HEPA filter, activated carbon technology, UV technology, and negative ion. I will give you brief descriptions about these types for your imagination.

  • HEPA filter: This is the most common technology. It is claimed to clean 99.97% of all airborne particles as large as 0.3 microns. It can be able to trap various of things, such as unseen bacteria, germs, and mold. One great thing about this technology is that it does not generate ozone or harmful stuff back to the environment.
  • Activated carbon technology: A carbon filter is usually equipped in air purifiers to target odors, or pollutants like gasses, tobacco smoke, or chemical emissions.
  • UV technology: If the HEPA filter captures particles by its fiber-like system, UV technology, on the other hand, will kill germs by UV rays through a lamp installed inside.
  • Negative Ion: To make it simple, this is a chemical solution to clean the air. However, there is a downside of this technology that is particles are not completely destroyed, but attached to walls and solid items so that they cannot floating around and disturb you.

These four technologies sometimes solely used or combined to maximize the satisfaction of customers’ need. You need to make sure what you want to remove, how clean is the air to not overpay for the feature you will not use.

Apart from the types, there are few more factors you need to take into consideration


Room size

There is one factor that directly affects the efficiency of one air purifier is the size of your room. Every air purifier has a coverage area figure, which tells the size of the area that the machine works best. You should choose air purifier base on this figure, if not, you may overpay for a much larger product that you do not need, or accidentally buy weak one which cannot do anything for your large room at all.

Filters That Can be Cleaned or Changed

There are two kinds of filters available on the market: permanent and the one you have to replace every 3-6 months depends on the brand. The permanent one is washable, and the other cannot be washed. However, with the later filters, you can vacuum to prolong their lifespan. When shopping for an air purifier, you should take a look at the price of spare filters too: are they affordable, how often they need to be replaced, etc.

The Noise

Nowadays, companies always try hard to maximize the experience of their customers, so that almost all air purifiers on the market are equipped with the technology to reduce noise. However, you need to know that the sound will be louder while the machine is running in high speed or special settings (for example, ozone or ionize). One tip for you is that you can pick a larger product and run it on a low speed.

The Design

The term “design” is not only referred to the product’s shape or color. It also consists of some features that enhance your comfort while using the product. Talking about the design of air purifier, it is usually designed for just one room. If you want to move it from one room to another, you may want to have a proper handle or rollers.

Air Purifier Reviews

GermGuardian AC4825 3-in-1 Air Cleaning System – Best Air Purifier for Medium to Small Room

If you are looking for a small but powerful enough for your “not so spacious” room, here is one good option should be on the list. This air purifier is 22 inches tall and only takes up an 7 x 10-inch area to stand, so you can set your mind at rest and let it do all the work without bothering about its presence.

The GermGuardian purifier comes with a multi-layer air cleaning system. The first layer is a combination of pre-filter and charcoal filter, which will diminish larger particles and common odors around your house. The second layer is a True HEPA filter, which is said to trap at 99.7% of particles as small as 0.3 microns. It is the filter that is beneficial for those who are suffering asthma or allergic problems. But good things do not stop here; one more UV-C light system is equipped to kill bacteria and viruses, as well as dissolve odors caused by smoking or cooking.

The best thing about this product is that you do not need to remember when to change the filters or UV light bulb because the machine will remind you itself. There is an indicator light on top that will blink whenever it is time.

Despite all the favorable review, the machine has some downsides. There are three levels of cleaning speed available. However, the noise is quite loud when the highest level is on. Another inconvenience is that the filter is not washable; you can only vacuum it or use some blowing machine to blow out all the dirt and pollutants. One way to extend the lifespan of those filters is to another pre-filter layer, which is quite cheap and can be easily bought everywhere on the internet.

To conclude, the GermGuardian AC4825 3-in-1 Air Cleaning System is a good deal with some amazing properties when you are looking for an air purifier for your medium size room. Regardless of some minimal downsides, you can see the effect as soon as the power is on, so it is still worth trying.


  • Clean the air effectively, reduce allergens and asthma triggers, as well as household odors
  • Small and perfect for medium size room
  • Indicator light reminds time to change filter and UV bulb


  • The noise is quite loud
  • Filters are not washable

Alen BreatheSmart Customizable Air Purifier – Best HEPA Air Purifier

You do not only need an effective air purifier but also want a beautiful, stylish one to decorate a little, boring corner of your house? Comes in numerous colors (fifteen to be exact) and a clean, minimal design, this air purifier from Alen BreatheSmart is perfect for your lovely home.

Just like the previous from GermGuardian, Alen BreatheSmart also uses HEPA technology for their best-selling product, but with an upgrade version. There are four types of HEPA available for this air purifier that allow you to customize freely. The standard version is HEPA-Pure which will get rid of everyday dust, allergens, and pollutants. HEPA-Silver, on the other hand, is a solution for germs, molds and some asthma concerns. HEPA FreshPlus is a version equipped with chemicals that will diminish smoke, VOCs, as well as heavy chemicals. Last but not least is HEPA OdorCell, which is the best option if you have a pet or your baby is still using diapers.

This version has the color of carbon fiber, which is quite similar to dark gray at the front and the back side is light gray. The filter system is HEPA-Pure, with the size of three packs, which is strong enough to cover the area of up to 1,100 square feet.

Besides that, Alen’s Smart Sensor technology will automatically detect and modify the cleaning mode. It can help you to conserve energy, save some money and lengthen the lifespan of the filter system, while still maintain the best air quality for your home.

There are not so many things that you can dislike about this product. One minus is the noise when it is running on high setting, in spite of the quiet of WhisperMax technology claimed by the brand. Moreover, this is a bit pricey compared to other options.

Overall, if you are looking for an air purifier which is not only productive but also good looking, this might be one of the best options you can find.


  • Customizable with four types of HEPA filters
  • Various colors which will perfectly match your style
  • Works great even with big-size apartment


  • Maybe noisy while running on high setting
  • The price is quite high

Alen BreatheSmart Customizable Air Purifier – Best HEPA & Stylish Air Purifier

The third one in the list is just in the same line with the second one. The only difference is color and size of the pack. The color selected here is the oak color for the front side. For easier visualization, you can imagine of dark brown color with some wood-like patterns to make it more natural. The back side is the same for the whole line – light gray. This color is perfect when your room floor or furniture is made of wood or has wood-like cover.

This version uses the 2 –pack HEPA-Pure filter, which is the standard filter system of the Alen’s BreatheSmart line. The machine will take care of all the dust and allergens (like pollens or mold spores) floating around you, leaving the air clean and breathable.

All products in BreatheSmart line can cover up to 1,110 square feet. No matter where you put the machine, its fan will blow clean air up to the ceiling and spread out across the whole room. That is why it will be beneficial for living rooms, offices, or even big open space rooms.

The only thing that you may not like about this product is the mismatch between the front and the back color. However, the back side will be placed facing the wall, so it will not be a big problem.

To make a conclusion, this Alen BreathSmart HEPA-Pure 2-pack is a good product for those whose are looking for a stylish air purifier, which will fit their home’s wood look decoration.


  • Strong HEPA filter which can cover up to 1,100 square feet
  • Polished design


  • The mismatch in color between the front and back side

Alen BreatheSmart FIT50 Customizable Air Purifier – A Powerful and Compact Air Purifier

Next on the list is another product from BreathSmart line of Alen. You may notice a small dissimilarity in the name: the “FIT50” part. Everything about these two lines is the same, of four types of filter systems, the technology, to numerous color options. The only difference is the coverage area: while BreatheSmart can cover up to 1,100 square feet, BreatheSmart FIT50’s coverage area is 900 square feet. So, to make it simple, the FIT50 is a compact version of the normal BreatheSmart.

The filter system used in this product is the HEPA-Silver, which is a perfect solution to get rid of all the unpleasant things around the air, such as mold, germs, or even asthma and allergic triggers. A smart sensor installed inside the machine will automatically adjust to the air quality and purify the air two times every hour. Thanks to this, you can reduce the energy usage and of course, save money.

The air purifier comes in white color. It is so far my most favorite one, because of the clean and simple look, which is perfect for a minimal bias like me.Just like the normal BreatheSmart, the FIT50 version can satisfy most of your air-purifying needs. However, there is still a minor problem to complain: the noise. The machine is quite quiet in the two lower modes, but when you turn on the higher speed, the noisy sound appears. So, if your room is not so big, run it on low speed; otherwise, you have to put it in a large room to reduce the noise.

Overall, I am still glad that BreatheSmart has this FIT50 compact version. This product will be beneficial for those who live in a small or medium room with the 800-square-feet coverage area.


  • Compact version of BreatheSmart
  • Various color and four types of filter to customize
  • HEPA-Pure system will get rid of all dust and germs in the air


  • Loud noise while running on high mode

Rabbit Air BioGS 2.0 Ultra Quiet HEPA Air Purifier – Best Air Purifier for Medium Room

The next up in our list is the BioGS 2.0 Ultra Quiet from Rabbit Air. The product uses a four-stage purification system that will assure you an environment which is clear of all the dirt, allergens, as well as smoke, and common household odors. This purification and deodorization system consists of a pre-filter, a HEPA filter exclusively to BioGS technology, a charcoal-based activated carbon filter, and finally, a negative ion generator.

Unlike the Alen’s BreatheSmart, this BioGS 2.0 from Rabbit Air is suitable for small to medium size room and will work best with the area of about 500 to 625 square feet. The air will be clean thoroughly twice every hour, make sure of a fresh and breathable indoor environment for your family.

The thing I like most about this product is that it is children-friendly. The front panel is removed so that your child cannot accidentally pause or turn off the machine. There is a remote panel to control the timer or speed settings, even when you are lying on the bed.

The Rabbit Air BioGS 2.0 can satisfy you regarding air purification, but there are still some dislikes, mainly because of its design. It has a sophisticated, curvaceous body but does not come with any roller or handle. So it is quite hard to carry or move it.

Although the Rabbit Air BioGS 2.0 is only suitable for small to medium rooms, it has an appealing design, as well as some great features for you to enjoy a fresh and clean environment.


  • Appealing and children-friendly design
  • Four-stage purification system
  • The pre-filter is washable, and the other filters can be vacuumed


  • No roller or handle, so it is hard to move

Coway AP-1512HH Mighty Air Purifier, White – An Eco-friendly and Energy-Saving Air Purifier

In case you have a small room and not so much space for an air purifier, you may want to take a look at this machine from Coway. Though the machine has a compact design, it is equipped with powerful four-stage filtration and able to cover up to 361 square feet. A little bit different from the Rabbit Air’s, the Coway’s filtration, which consists of a pre-filter, a carbon filter (for odors eliminations), a True HEPA filter, and a visual ionizer, will eliminate all pollutants floating around your house, leaving you a perfectly purified indoor atmosphere.

But the best thing about Coway air purifier lays on its eco mode. Nowadays, most air purifiers have air quality adjustment feature, which sensors the air quality and modifies the machine’s speed. Coway has leveraged this feature to another level: when the air is clean, and no pollutants are detected within 30 minutes, Coway AP-1512HH will automatically stop to save energy. It is not only eco-friendly but also a good way to save money.

However good it is, the Coway’s machine is receiving the same complaint as some previous: loud noise while running at high speed.

Overall, Coway Mighty Air Purifier is a worth considering product. One thing that makes me love it so much is the simple design, and square shape, which will fit almost everywhere, even in limited space.


  • Powerful four-stage filtration
  • Eco mode which will save energy and money
  • Filters are easy to clean


  • Loud noise while running in high speed

Honeywell True HEPA Allergen Remover – Your Room Will be Cleaned Every Twelve Minutes

If you are an allergen-sensitive or living in a polluted area and need to clean the air more frequently than twice per hour, this True HEPA Allergen Remover HPA300 from Honeywell is ideal for you. Not only capture 99.97% of all particles and allergens like others HEPA filter, but Honeywell HPA300 also get rid of smokes and common household odors. There are four levels of filtration to choose, such as germ, general clean, allergens, and turbo. The higher in level, the more powerful in air flow and odor diminishing, but please note that louder noise will come along.

Besides that, this air purifier will clean and circulate the air in your room every twelve minutes (five times an hour), which is double and a half more than a regular air purifier. Despite working so hard like that, Honeywell HPA300 will not release ozone back to the air, so set your mind at rest if this is your concern.The only downside of the product is the expensive spare filters. However, they are quite durable and will last for a while until you need to change them.

This Honeywell air purifier will satisfy you if you do not care much about the design and just focus on features and the efficiency. Your indoor environment will be clean, the air will be breathable, and you will no longer have to face with allergies or bad odors.


  • Four filtration settings to choose
  • Air purification and circulation five times every hour
  • Pretty quiet, even on high settings


  • Spare air filters are expensive

Honeywell 50250-S True HEPA Air Purifier – A Highly Functional and Durable Air Purifier

Say hello again to Honeywell, looks like this brand has captured many customer’s hearts. The Honeywell 50250-S is made up of a two-layer filter system and a powerful fan motor which will draw air and releases fresh air back to the environment. Two layers of the filter system are a pre-filter activated with carbon to trap large particles and a True HEPA filter to capture up to 99.97% of particles as small as 0.3 microns.

Honeywell 50250-S focuses on the durability, as the long-life HEPA filter can last up to five years. One recommendation to extend the lifespan of the filter is that you should vacuum it frequently to get rid of all the dirt and dust. The pre-filter, on the other, can not be vacuumed and should be replaced every three months to maintain the best condition for the machine. There is also the Intelli-Check™ Electronic Filter Indicator to tell you when to change your filters.

The minor drawback of this product is the loud noise. So if you can stand to noisiness, you can let the machine run while you are not at home and turn it off when you come back.

To tell the truth, Honeywell has done well with their air purifiers. They are powerful, effectively clean the air, at an affordable price. So the Honeywell 50250-S is still a good product that worth your consideration.


  • Durable product
  • Filters are easy to clean and change


  • Loud noise

GermGuardian AC5350B Elite 4-in-1 Air Cleaning System – Best Air Purifier with UV-C Light

A normal air purifier with several filters is not enough for you? You want to kill all the bacteria, germs and viruses in the air? Here is a product for you.

The GermGuardian Elite 4-in-1 Air Cleaning System is equipped with a three-layer filter system (consists of a pre-filter, a charcoal layer, a True HEPA filter) and UV-C Light Technology. Thanks to these, the machine will capture 99.97% of dust and household germs, absorb common odors from smoking or cooking, and destroy airborne germs.

There are total five speeds available to maximize the cleaning effect of the product. And here comes a thing that makes GermGuardian Elite 4-in-1 stand out from other air purifiers: even when running in the maximum speed, it is still quiet. Therefore, if you are easily distracted or cannot stand the noisy sound, this is one of the best choices for you.

The most mentioned drawback of this product is that it is only suitable for a small room with the area of about 200 square feet. Because of this, you need to measure your room carefully before purchasing.

In general, GermGuardian Elite 4-in-1 is good for those who are looking for an air purifier equipped with UV-C Light for a better air cleaning result. It is also a machine that will not take up so much space and best for small rooms.


  • Small and beautiful design, go along with a digital display
  • Equipped with UV-C light technology, which will kill airborne viruses and bacteria
  • Quiet even when running in high speed


  • Limited coverage area, only suitable for small rooms

AeraMax 300 Air Purifier – Best Air Purifier for Cold and Flu Season

Finally, we got to the end of the list, and this time is a product from AeraMax. The AeraMax 300 Air Purifier also uses a four-stage purification. Besides the carbon filter and True HEPA filter, there are two more stages to get your air clean thoroughly: the AeraSafe antimicrobial treatment which is provided to avoid the growth of bacteria and fungi on the HEPA filter, and plasma technology which will ionize the air to remove all the leftover pollutants completely. With that said, the product has received a certification of asthma and allergy friendly.

Another wonderful feature about AeraMax 300 Air Purifier is that it has a special mode for cold and flu season, which is in the high-performance mode to effectively capture influenza virus. Thanks to this, you do not need to worry about that annoying time every year.

One more glad news for those who are looking for an air purifier for their large rooms or open spaces, this AeraMax 300 is best used for an area of about 300 to 600 square feet. However, if your place is a little larger, no problem, it will do fine.

As for the downside of this air purifier, the sound is quite loud while running on the ionize setting. In case you cannot stand the noise, you can easily turn it off while you are in the room.

To conclude, AeraMax 300 Air Purifier is highly recommended for families who have some asthma or allergic issues, especially during cold or flu season. Your indoor air will be much more breathable, fresh.


  • Special high-performance mode for cold and flu season
  • Four-stage purification with AeraSafe antimicrobial treatment to avoid bacteria and fungi
  • Work well for large room


  • Ionize setting has loud noise

Final Words

Even an air purifier is only a gadget among thousands of things in your home; you should not buy it in a hurry. Take a deep breath, do some research, read some best air purifier reviews on the internet before decide to buy one. I hope this article will save you some time and make it easier for your decision.

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