7 Best air purifiers


  • 4-stage filtration system
  • Includes air quality indicator+ filter change indicator
  • Ionizer and Eco modes available
  • Recommended for room size 528 sq. ft.
  • Airflow rate of up to 7.6 CMM

Having to go through the flu season or work indoors all day can be a chore. And it’s made even worse if you’re sensitive to smells and allergens a bit more than the regular Joe. Who wants that if they can help it?

Well, ask anybody and they will tell you to get yourself an air purifier. But, with so many brands and types out there and considering your budget, narrowing down on which best air purifier to buy can make your head spin.

Let us help you out! What is the best air purifier in 2021, you wonder? Based on our tests and air purifier reviews from buyers, we have compiled a list of the best products available on the market below.

Best air purifiers in 2021

PreviewProduct nameAir Quality IndicatorAutomatedHEPA filtrationRecommended room sizeDimensionsWarrantyMore information

Coway best air purifier

Coway AP-1512HHYesYesYes528 sq. ft.16.8 x 9.6 x 18.3 inches3 years
best air purifier for smokeBissell air400YesYesYes300-400 sq. ft.16.1 x 9.8 x 24 inches
best air purifier for moldGermGuardian CDAP4500BCAYesNoYes153 sq. ft8.88 x 6.38 x 22 in
best home air purifierWinix 5500-2YesYesYes360 sq. ft.15 x 8.2 x 23.6 inches1 year
Hathaspace top rated air purifierHathaspace 6-in-1YesYesYes350 sq. ft.13.5 x 7 x 19.5 inches
Honeywell air purifier for dustHoneywell HPA300NoNoYes465 sq. ft.9.2 x 20 x 22.2 inches5 years
Levoit - cheap air purifierLEVOIT LV-H132YesYes86-129 sq. ft8.5 x 8.5 x 14.5 inches1 year

Air purifier reviews

Coway AP-1512HH – Purifier that won’t break the bank



  • 4-stage filtration system
  • Includes air quality indicator+ filter change indicator
  • Ionizer and Eco modes available
  • Recommended for room size 528 sq. ft.
  • Airflow rate of up to 7.6 CMM

We begin our list with the Coway Air Purifier, a top choice among many customers based on their list of most popular air purifiers. If you are looking to buy a cheap, but one of the top-rated air purifiers, without compromising on the quality, we recommend giving the Coway Air Purifier review a read.

Thorough filtration

While small, the Coway is one powerful air purifier. The presence of a four-step filtration sets up a mix of a bipolar ionizer, pre-filter, true HEPA filter, and an odor filter that successfully reduce any allergens, airborne odors, and pollutants present. The bipolar ionizer in the four-stage filtration process works up an electrochemical reaction that decreases particles in the air, effectively creating a flow of clean air within your space. Coway’s air quality indicator lets you know the indoor air quality in real-time. So just look at the LED sensor light and find out how well the purifier is working.

Reasonable price

Comparing the prices of other, similar purifiers, what we noticed straight off the bat was that Coway AP had one of the cheapest retail prices out there. If you are not willing to spend more than a couple hundred dollars on a filtration system, this definitely one air purifier you should consider. However, just because the Coway is a cheap air purifier, it absolutely doesn’t mean this is its best quality; just one up for consideration. It was rather hard for us to come by another purifier that came at such a low price and provided with a range of facilities you can expect from some of the top-rated ones.

Saves power and energy

If irritants are detected in the air, the Coway will automatically adjust fan speed as required for far more effective filtering. When the device does not detect any more particles indoor for over half an hour, it switches off by itself to save power. Besides the automatic fan speed regulator within the air purifier, you choose between the three modes to adjust the device to your preferences.

What we like:

  • A HEPA-certified machine that thoroughly filters the air
  • Excellent prices and comes with 1 HEPA filter and 1 carbon filter
  • Automated and saves energy when not needed
  • Indicates the quality of the indoor air through sensors

What we didn’t like:

  • Indicator light too bright for sleeping spaces
  • Can make noise when fan set to the highest speed

Bissell air400 – Best air purifier for smoke and fumes



  • 1-inch thick activated carbon filter designed specifically for the purpose of absorbing smoke, odors, and VOCs
  • 3-stage filtration system
  • Suitable for medium to large rooms between 300-400 sq.ft.

The Bissell air400 is another top-notch product that made its way into our list of the best air purifiers. Particularly designed for large living spaces, this purifier functions to rid the indoor air of fumes and other harmful irritants.

Smoke absorption

The Bissell air400 rids indoor air of odors. Like any quality air purifier, it is considered one of the best air purifiers for dust. But its specialty lies in filtering the air to create a completely smoke-free zone.

Before reviewing anything, we usually take the manufacturers’ claims of their products with a grain of salt. But Bissel’s promise of being adapted to combat smoke has proven to be tried-and-true, with many buyers living in areas prone to wildfires claiming this to be their saving grace.

Thick charcoal filter

The thicker the carbon filter, the stronger the odor a purifier can absorb and Bissell air400 seems to have one of the thickest ones around. It moves a lot of air in a small amount of time, effectively cleaning up odors from kitchens and that wet, stable smell most pet owners seem to experience.

Night mode

A common complaint, as seen with the Coway Air Purifier, is that the indicator light is too bright and that it disrupts sleep when kept in the bedroom.

To combat this, the Bissell comes with a silent mode and an automatic night mode, perfect for when you need that little peace and quiet. The lights on the top of the device switch off and the color wheel dims, allowing for the purifier to run in the background without being a distraction.

What we like:

  • Filters a huge amount of air considering its compact size
  • Runs silently in the background
  • Suited for areas experiencing a lot of smoke or pollution
  • Absorbs smells without a trace
  • Reasonable price

What we didn’t like:

  • Can sometimes receive products with faulty systems


GermGuardian CDAP5500B – Good for fighting mold



  • Control via Wifi and Bluetooth
  • Reminds you to replace the filter
  • UV-C light technology works with Titanium Dioxide to kill germs

We’re no germophobe but we do like our indoor space not making us sick every so often. This is where this particular air purifier comes into action. The GermGuardian does what it says on the can and much more. Check out our experience with the purifier to help you with your decision in picking one.

Fights bacteria and other germs

You will find other air purifiers on the market that get rid of allergens and other irritants from your living area but so far, this is one of the few ones we have that not only filters the germs but also kills them. Molds, bacteria, fungi spores, these are all irritants that are always present around us, in some areas more than others and you will be surprised to know how much if you ever brought a blue light into your home.

A good indicator that indoor space is prone to germs is how often the inhabitants are getting sick, be it sneezing, allergies, rashes the whole nine yards. This is especially true if you have children or pets in the house. Not only are they more likely to introduce germs into space, but they are also the most vulnerable when these pathogens become airborne.

The GermGuardian is heavily marketed towards getting rid of such issues, using a combination of UV-C light technology and Titanium Dioxide to kill those pesky germs once and for all, eliminating chances of breeding in your home.

Can be operated from anywhere using a smartphone

With GermGuardian feeding data to your preferred devices through a WiFi and Bluetooth connection, it’s possible to always monitor the quality of your air whenever wherever. This particularly useful if you are away with pets or children back at home. The app lets you control the settings and set the timer according to your needs.

Uses a light ring to indicate PM (particulate matter)

As an air purifier heavily advertised towards fighting allergens and other disease-causing pathogens, it seems only right that the GermGuardian has a light ring that changes color to indicate the amount of particulate matter present. The ring changes color from green to yellow to red to show how the air is changing. Even without the app feeding you more specific data in real-time, you or another inhabitant, perhaps a young child, could always have an approximate idea of what is happening in their living space.

What we like:

  • Designed to fight allergies and fungal infections
  • Kills the bacteria instead of just flushing it out
  • Air quality readings are sent over to your phone
  • Suitable for a place susceptible to mold growth, bacteria etc.
  • Washable filter

What we didn’t like:

  • Cannot be controlled without an app
  • The app may have a problem connecting


Winix 5500-2 – Good air purifier for odors

WINIX 5500-2


  • A 3-stage air filtration system
  • Washable AOC carbon filter
  • PlasmaWaves permanently filters out odors and VOCs
  • Makes auto-adjustments to fan speed

The Winix 5500-2 makes its way into our list because of its innovative odor-destroying technology and perhaps it will be your choice too.

Very cheap for an air purifier

Coming down to just around 160 dollars, this is so far the cheapest air purifier on our list. We get our money’s worth out of the Winix. However, just because it’s cheap doesn’t have to mean it’s cheap. The Winix 500-2 is one of the most intuitive devices for your home, with a user-friendly interface, 4 fan modes, PlasmaWave technology, and all without having to loosen our purse strings.

PlasmaWave technology and light indicators

The PlasmaWave works double-time breaking down odors and smells. The machine functions to process the air and work to permanently filter it, instead of recycling it. The light communicates when this is happening, stays the same color with the process is going on, and then changes back to the normal setting when it is done. This function can even be turned off if necessary.

4 fan speed settings

You can manually run the machine on 4 fan settings, or choose an auto mode and let the machine choose the settings based on the data collected from the sensor. This means hands-off operation. With 4 settings we can manually set the speed to exactly what we want. The options include Low, Medium, High, and Turbo.

What we like:

  • Deals with dust
  • Detailed light indicators
  • Cutting-edge plasma technology
  • Very cheap price
  • Indicates when the filter needs changing
  • Good for people handling common household odors

What we didn’t like:

  • Sensors may be faulty

Hathaspace HSP001



  • Targets asthma-inducing particles and allergens
  • Suitable for average-sized rooms
  • Combats pet dander and hairs
  • 4-stage filter system

We recommend the Hathaspace for those on a budget and are willing to give up a little space for fresh air.

4-stage filter system for thorough purification

The nano-cold catalyst filter gets rid of larger particles such as pet dander and dust, along with toxic household chemicals such as ammonia, formaldehyde, and benzene from the air space. This is the first step.

After the catalyst is done, activated carbon molecules absorb smoke, odors, fumes, and VOCs around your home so that the air can move into the next stage. In the final step of the process, nano-materials in the anti-bacterial filter eliminate and destroy any traces of bacteria, viruses, and fungi left.

3 fan speeds as well as automatic functioning

Buyers get the option to choose from 3 fan speeds which are low, medium, and high. There is also the option to switch Hathaspace to auto mode, where the fan speed is automatically adjusted based on the air quality sensor measurements.

UV light technology and ionizer

Hathaspace gives the choice between two settings: an ionizer and a UV-C light sterilizer. UV light gets rid of airborne bacteria and other micro-organisms by targeting their DNA, stopping them from multiplying altogether. On the other side, we have the ionizer, which gives negative ions that attach themselves to irritants that are positively charged and presented in the air, nullifying them in the process.

What we like:

  • Cheap retail price
  • Thorough filtration system
  • Automatic functioning
  • Dual technology for twice the efficiency

What we didn’t like:

  • Can fail to run or stop during filtration process (may be unique to the device)


Honeywell HPA300 – Good for dust control



  • Cycles air at a rate of 5 times per hour
  • Certified HEPA-technology
  • Made for x-large spaces (465 sq. ft.)
  • Capture up to particles as small as 0.3 microns

4-stage of filtration + little to no sound

There are 4 levels of setting on the Honeywell HPA300. In the order they come in, these are GERM, GENERAL CLEAN, ALLERGEN, and TURBO. The first level, GERM, produces minimal to almost no sound. This is ideal if you do not prefer white noise while going about daily activities. The second stage is a pleasant white noise that is barely audible but does not skimp out on the filtration. The 3rd and 4th levels offer superior airflow. In a lot of air purifiers, the highest settings produce considerable noise, with the fans working overtime. But Honeywell is almost silent compared to those, sometimes pricier options.

Replacement filters are easy to use and maintain

The Pre-Filter A inside the purifier needs to be replaced in a rotation of 3 months while the HEPA filter can be replaced annually. But it’s all right if we forget because the lights on the machine give you reminders when your filters need changing. The maintenance process itself is fairly simple with usually no need for expert help.

Works well for large rooms

Honeywell HPA300 is an exception from other air purifiers designed for larger spaces. Unlike the other designs we see on the market, Honeywell can function at one of its highest modes without making a peep not seem clunky and out of place.

What we like:

  • Covers a lot of ground
  • Can filter up very small particles
  • Relatively quiet

What we didn’t like:

  • Can sometimes give off chemical odors

LEVOIT LV-H132 – Best for small spaces



  • Does not emit ozone
  • Includes 3-stage filtration system
  • 3 fan speed settings
  • Light includes brightness setting

The Levoit is what we would call a humblebrag. Coming in at a whopping 89 dollars, this mini-purifier is available in two shades: black and white.

A 3-stage filtration system for common airborne particles

Fine Preliminary filter gets rid of dust particles and the carbon filter takes care of any lingering smells and odors in our home. After that Preliminary and HEPA filter rids our space of animal dander and allergens respectively.

For small spaces only

Expecting such a small purifier like Levoit to cover a 3-bedroom house would not be our best decision but for such a mini device, it can still pack a punch. This is a family-friendly product suitable for small apartments and single rooms. Not as powerful as some of the heftier options in this list but with the right placement in a medium room, this gives us our money’s worth.

What we like:

  • Doubles as a nightlight
  • Small and sleek
  • Easy to handle
  • Suitable for small indoor spaces

What we didn’t like:

  • Product warns of choking hazard for very young children


Questions to ask when investing in an air purifier

So far, we discussed quite a few products in this air purifier review. If you are still stuck on the fence about which purifier to buy, we have listed some pointers to help you narrow down your search. Also, hang around to find out which purifier we crown our favorite.

Consider your room size

If someone is thinking about buying an air purifier, chances are they have already considered where it’s going to go. If you live in a small apartment by yourself, your needs will be much more different than a family of six living on a farm. Think about if the gadget will become an obstacle if it is placed in certain areas. If necessary, bust out a measuring tape and compare the purifier sizes available. No need to buy something three sizes too big.

Consider which size you would like

So you know which size you might need, but what you actually need might actually vary. Size doesn’t always correlate to power so what you will need to look into instead is how fast the device needs to cycle air. If you are someone with respiratory problems or are prone to allergies, you will need a purifier that has a high rate of ACH.

Think about the upkeep

The air purifier you have your sights set on; does it need its filters changed every month or every year? Are you a forgetful person? Maybe get a purifier that does the job of reminding you when it’s time to change them. Consider this and look into product details for more information.

What’s the reason you need an air purifier in the first place?

If you live in a city with smog or near a wildfire zone, it’s best if you invest your money in a purifier that is specialized to handle smoke, like the Bissell model. If you suffer from infections and diseases, GermGuardian may be your guardian angel.

Final thoughts

Having reviewed many air purifiers, we probably will never smell stuffy, indoor air the same way again. We hope you find the right air purifier for your home and that this article has pushed you a little closer to making a choice.

For our pick, we will have to go with the Coway AP-1512HH, which is our favorite out of all of them. With its sleek, sophisticated design and all-over functions, it isn’t really a surprise that it is also a top-rated purifier among many customers as well.

5/5 - (8 votes)

Last update on 2023-01-21 / Affiliate links / Images from Amazon Product Advertising API

Edwin Roberts

Edwin is a certified design and home interior specialist. He also has extensive personal experience in home improvement and housekeeping.

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