Top 10 Best Large Room Air Purifiers in 2021 (over 300, 500 square feet)

There are always large rooms in this world, right? Maybe they are one or two large rooms in your home, a 5-star level Hotel room, or even a meeting hall. A large room covers a huge amount of air which can be very polluted. Here are the reasons you are looking for the best large room air purifiers for your needs.

  • You found out that your air purifier is insufficient for your large room (over 300 or 500 sq ft) or kind of useless.
  • You had a large room with lots of people (meeting halls, restaurants, hospitals) and you need a real large room air purifier to meet everyone’s demand.

Let’s not waste your precious time searching for many other website reviews and ratings. You will be overwhelming for sure! Meanwhile in Breathe Quality:

  • We do give honest reviews (both pros and cons) and a base comparison for all the air purifiers so anyone will guarantee to have the wisest choices.
  • We do not (in fact, we never) exaggerate one product just to let you click the links and buy that product blindly.
  • Air purifiers are for everyone. Believing that, we will give you the best air purifiers in all price ranges. To know the exact price of your air purifier, make sure to hit the Check price button.

Important Note: If you have a small room, we highly recommend that you read our list of the best small and quiet air purifiers in 2021.

A large room over 300 and even 500 sq ft is a huge space of airflow. To inhale and exhale such a large amount of air, an air purifier needs lots of fan power. And therefore, you can’t expect a cheap air purifier to do such a difficult task for you. We will bring you the top 10 most powerful large room air purifiers in 2021.

UPDATED: We have updated our list of best large room air purifiers on 03/15/2020, as a result of a 3-month lab test. In Breathe Quality, we keep updating our posts whenever possible, and this time we will add the latest version of Dyson Pure Cool Tower in the list of best large room air purifiers, as well as welcome the Blueair Classic 605 and Blue Pure 121 back in the game. Also, we finished testing the Medify MA-112 and we believe this air purifier deserves a slot in our list.

Our next update will be set for 3-6 months later, depending on the release of new products from the well-known air purifier brands. However, you don’t need to wait, because the air purifier market will never change so quickly.

Related posts:

It’s time to dive into the best large room air purifiers.

Base Comparison Table of Best Large Room Air Purifiers in 2021

This Comparison Table of the best large room air purifiers in 2021 will help you have a quick overview of our list. The factor for comparison in this table is the filter types of this air purifier, we also give the most concerned factors as Room Capability (of course you need it for your large room over 500 sq ft), and a shortcut to their True HEPA Filter replacements (HEPA Filter needs to be replaced after 6 months to 1 year).

Remember that you should check the reviews of the air purifiers in this comparison table. Just check the factors won’t help you know why we put these 10 devices as the best large room air purifiers in 2021.

ImageNameFilter TypesRoom Coverage (sq ft)Annual Filter ReplacementCheck ReviewCheck Price
best large room air purifiersIQAir GC MultiGasTrue HEPA Filter, Carbon Filter1125IQAir HyperHEPA FilterRead More
Top 10 Best Large Room Air Purifiers in 2021 (over 300, 500 square feet)Blueair Classic 605Particle/SmokeStop filter (HEPA Filter + Carbon Filter)770Blueair FilterRead More
Top 10 Best Large Room Air Purifiers in 2021 (over 300, 500 square feet)Dyson TP04True HEPA Filter, Carbon Filter700Dyson FilterRead More
Top 10 Best Large Room Air Purifiers in 2021 (over 300, 500 square feet)Austin Air HealthMate Plus (HM450)True HEPA Filter, Carbon Filter1500Austin Air FR450A FilterRead More
best large room air purifiersAIRMEGA 400STrue HEPA Filter, Carbon Filter1560AIRMEGA FilterRead More
Top 10 Best Large Room Air Purifiers in 2021 (over 300, 500 square feet)Medify MA-112True HEPA Filter, Carbon Filter, Ionizer1200Medify MA-112 FilterRead More
best large room air purifierAlen BreatheSmart 75iTrue HEPA Filter, Ionizer, Carbon Filter1300Alen True HEPA FilterRead More
best large room air purifierLevoit LV-H134True HEPA Filter, Carbon Filter710Levoit LV-H134-RF FilterRead More
Top 10 Best Large Room Air Purifiers in 2021 (over 300, 500 square feet)Blue Pure 121Particle filter, Carbon Filter620Blue Pure 121 FilterRead More
best air purifiers for dustSharp FPA80UWTrue HEPA Filter, Carbon Filter, Plasmacluster455Sharp FilterRead More

Best Large Room Air Purifiers – The Most Powerful List in 2021

1) IQAir GC MultiGas – Our 2021 Champion

 Previously in our list:   IQAir GC MultiGas.

IQAir is a true giant in the air purifier industry, the only to claim as the World’s Best HEPA Air purifier, with the foundation to be 50 years ago. This brand is only dedicated to bringing out the luxury high-range air purifiers. IQAir GC MultiGas is currently the most powerful air purifier for large room.

So why Breathe Quality gave the gold medal to IQAir GC MultiGas?

It has the highest-quality air filtration process and an amazing fan power to keep cleaning your room quickly and effectively. As the champion of the large room air purifier, IQAir GC MultiGas can cover a room of up to 1125 square feet. But equally important, the IQAir GC MultiGas features a powerful New Edition Fan. With this new technology, GC MultiGas can have a Clean Air Delivery Rate (CADR) of 300 cfm. To top up with this high CADR, IQAir GC MultiGas loads 5x air changes per hour (ACH).

best large room air purifier

Related post: Best air purifiers for smoke.

However, room coverage and fan power is just one criteria to decide the champion. The bottom line is the perfect performance rating of IQAir GC MultiGas. IQAir proudly claim to be the #1 Air purifier for smoke, odors and MCS not without a reason. Let’s have a look in the 4-stage Air Cleaning system below:

  1. HyperHEPA filter – You will have a powerful HyperHEPA H11 pre-filter. This True HEPA filter is effectively capture 99% of particles down to 0.3 microns, and 95% of particles as small as 0.003 microns.
  2. Cartridge-based activated carbon filter – This filter can remove VOCs and odors effectively because it is made with the highest quality ABS plastics.
  3. Cartridge-based chemisorption – This stage destroys harmful chemicals, such as formaldehyde by an oxidation process. Any kinds of smoke or VOCs pass through these two cartridge-based filter will be absorbed completely.
  4. Post-filter sleeve – A post-filter sleeve wraps each gas cartridge to prevent media dust from being released back into the air.

IQAir GC MultiGas is well-built with the highest quality materials, so you should not worry too much. The IQAir unique 3D UltraSeal no-leakage design will prevent air from escaping back into the room without being drawn through the GC MultiGas filters.

Here is the pros/cons of IQAir GC MultiGas:


  • Large Room coverage: 1125 square feet
  • World class fan power
  • Perfect air filtration system
  • Well-built with highest quality materials
  • 320° air distribution
  • Very quiet
  • Low power consumption
  • 5-year warranty

Review: IQAir GC MultiGas Review.

The IQAir GC MultiGas is mostly for dealing with the smoke, odors, VOCs, formaldehyde and other chemicals. If you have been worried about the typical dust, dust mites, pollen or pet dander, you should look for the IQAir HealthPro Plus. This air purifier is $400 cheaper than its GC MultiGas brother, while upgrading the HyperHEPA from H11 to H13. That being said, IQAir HealthPro Plus can deal with even 99.97% of any ultra-fine particles as small as 0.3 microns, and 95% of particles as small as 0.003 microns. We believe this is the best HEPA filter at the moment.

best large room air purifier

Review: IQAir HealthPro Plus Review.

Related post: Best air purifiers for baby.

2) Blueair Classic 605 – Our 2021 Runners-up

 Previously in our list:   Blueair Pro XL.

Blueair is also a well-known brand in the air purifier market for about 20 years. After many years of honing their experience, it is safe to say Blueair is a safe option for air purifiers, especially when it comes to a big air purifier machine for large room.

As the runners-up of best large room air purifiers list, Blueair Classic 605 can cover an extra large room of 775 square feet.

But don’t let the smaller room coverage fool you, the Blueair Classic 605 is one of the most powerful air purifiers at the moment, with a matchless fan power. The CADR rating of this air purifier is 500 Dust/ 500 Smoke/ 640 Pollen (cfm) and the ACH rating is 5X, which is even higher than the champion IQAir GC MultiGas.

best large room air purifier

In terms of power, Blueair Classic 605 isn’t as powerful as the previous Blueair Pro XL, but its high fan power nearly reaches the flagship of Blueair Pro series for only a third of the price. And the flagship of Blueair Classic series is using an all-in-one air filter as below.

  1. Particle Filter/ SmokeStop Filter – You can choose from the Particle Filter with the power to capture 99.97% of pollutants such as pollen, dust, pet dander, mold spores, viruses and bacteria down to 0.1 microns. Otherwise, you can pay more for SmokeStop Filter, which is most likely the combination of True HEPA filter and Activated Carbon filter.

Related post: Best air purifiers for dust.

After months of using the Blueair Classic 605, we believe this is the air purifier with most value for money you can get from the famous Blueair. It has a top-notch performance rating and a superior style, as well as high-end features that you can’t get in the Pro Series – the Smart control through Wi-Fi and Alexa, which is especially necessary in a large room.

Here is the pros/cons of Blueair Classic 605:


  • Large Room coverage: 775 square feet
  • Most powerful fan power in the world
  • World class performance rating and amazing air filtration
  • Well-built with highest quality materials
  • 5-year warranty

  • Bulky size and heavy
  • High power consumption

Review: Blueair Classic 605 Review.

3) Dyson TP04 – Our 2021 Third place

 Previously in our list:   Oransi Erik 650A.

The third position, again, sees a new shift for the Dyson TP04 – the flagship of the Dyson Pure Cool Tower series by Dyson. The British leading innovator in fan and air purifier market has released the fourth generation of their signature fan-air purifier combination

While the air purifier isn’t tested by AHAM for room coverage, we believe it can cool and clean an area of at least 700 square feet.

To deal with such large room, the Dyson TP04 has an unchallenged CADR rating of 600 to 770 cfm at maximum. The air purifier can deliver up to 93.5 gallons of purified air per second, thus clear the Oransi Erik 650A out of the list of best large room air purifiers. Moreover, the Dyson air purifier doesn’t have ACH rating, because it will continuously blow the air around your room, thanks to its cooling fan function.

best large room air purifier

Not only has an excellent fan power, the Dyson TP04 invents a high-quality air filtration system which passed many rigorous tests to meet the highest requirements.

  1. True HEPA filter – With the glass HEPA filter, the Dyson TP04 is able to capture 99.97% of all airborne particles as small as 0.3 microns, including pollen, bacteria and pet dander.
  2. Activated Carbon filter – Removes household odors and gases such as formaldehyde, benzene and nitrogen dioxide.

Besides the top-notch performance of its air filtration system, the Dyson TP04 is truly quiet for such fan power. You will enjoy using the device without any problem of the noise level.

Most importantly, the Dyson TP04 is a real Smart air purifier, as it can be controlled via Wi-Fi or Alexa, just like the Blueair Classic 605. Moreover, the flagship tower air purifier of Dyson has Smart Sensor, so it can clean the room automatically with precision.

Here is the pros/cons of Dyson TP04:


  • Large Room coverage: 700 square feet
  • Great performance
  • Cooling power is really cool
  • High-end features
  • Unique design


  • Only 2-year warranty
  • The air filtration system isn’t the best

Review: Dyson TP04 Review.

4) Austin Air HealthMate Plus (HM450) – Best Medical Grade for Large Room

 Previously in our list:   Austin Air HealthMate Plus.

With the title of “The only Clinically Proven, Medical Grade Air Purifier”, Austin Air is always the first priority when considering a best large room air purifier. If you could afford a high-range budget machine, Austin Air is the brand mentioning the most in 2021.

Their Austin Air HealthMate Plus is notable for large room coverage of 1500 square feet.

We can easily measure the fan power of this Austin Air flagship with a 5X ACH and 400 cfm CADR. This fan power is still extremely powerful for an air purifier, being double the CADR of the best low-range air purifiers like Coway AP-1512HH or Winix HR900.

best large room air purifier

One advantage for Austin Air HealthMate Plus is their medical grade 4-stage filter.

  1. Pre-filter – To remove any large objects of pollutant particles like pet hair, human hair or large dust. This pre-filter is washable and permanent.
  2. Medium Particle Pre-filter – Just like Rabbit Air MinusA2, Austin Air HealthMate Plus can remove molds, spores and pollen from this pre-filter.
  3. Activated Carbon filter – A 15-lb Activated Carbon, Potassium Iodide Impregnated Carbon and Zeolite to help remove VOCs, formaldehyde, benzenes, chemicals, gases and odors.
  4. True HEPA filter – With twice the pre-filter, the True HEPA filter will only need to capture the tiniest particles. Using a Medical Grade 60-square-ft True HEPA filter, Austin Air Healthmate Plus is a real deal to any contaminant problems in your large room.

The sound of this Austin Air HealthMate Plus is little at the lowest setting, but is incredibly high at the highest setting. It is recommended to run this air purifier at low setting more often.

Related post: Best air purifiers for allergies.

Here is the pros/cons of Austin Air HealthMate Plus:


  • Large Room coverage: 1500 square feet
  • Impressive fan power
  • Top-notch performance rating and air filtration process
  • 360° air intake
  • Well-built with highest quality materials
  • 5-year warranty

  • Lack of Smart features
  • Low CADR for the room coverage
  • Too noisy at high setting

Review: Austin Air HealthMate Plus Review.

5) AIRMEGA 400S – Top Rated Smart Air Purifier

 Previously in our list:   AIRMEGA 400S.

As the current flagship in 2021 of Coway, we expect much from AIRMEGA 400S. Indeed, this air purifier still marks the impressive performance and features.

For a large room air purifier, AIRMEGA 400S can cover up to 1560 square feet. The CADR is not included in this AIRMEGA’s manual, but through many deep tests, Breathe Quality recorded an underrated CADR of 340 Dust/ 350 Smoke/ 400 Pollen. This CADR specs is not sufficient for a large room coverage of 1560 sq ft.

best large room air purifier

Just like Blueair, Coway is now combining their air filters to become one for better installation. In this AIRMEGA 400S machine, we will have:

  1. Pre-filter – A powerful washable pre-filter is available to help you capture large objects of contaminants.
  2. Max2 filter – A combination of both Activated Carbon Filter and True HEPA filter, this filter can both capture up to 99.97% of airborne particles 0.3 microns and reduce more than 99 percent of volatile organic compounds and reduces fumes such as NH3 and CH3CHO.

With Smart Enabled Feature, AIRMEGA 400S is also the top rated smart air purifier at the moment. This brand has an unique Eco Mode to change the fan speed depending on the air quality, and therefore save energy.

Related post: Best air purifiers for office.

Here is the pros/cons of AIRMEGA 400S:


  • Large Room coverage: 1560 square feet
  • Amazing performance rating
  • 360° air intake
  • Well-built with highest quality materials
  • 5-year warranty

  • App receives many negative reviews
  • High cost filter replacement
  • Low CADR for the room coverage

Review: AIRMEGA 400S Review.

6) Medify MA-112 – The best flagship on a budget for large rooms

 Previously in our list:   Dyson DP04.

With an unmatched fan power, together with a H13 True HEPA filter, the Medify MA-112 officially wins a slot in our list of the best large room air purifiers. This is the flagship of Medify Air, packing with the internal power that you could expect from a flagship, with much lower price than things like the IQAir GC MultiGas or Blueair Classic 605.

Medify MA-112 is suggested for a room size of 1200 to 2400 square feet by the manufacturer, and with the AHAM’s CADR rating of 400 Dust/ 450 Smoke/ 450 Pollen (cfm), this is one of the best air purifiers for fan power we’ve ever tested.

best large room air purifier

Unlike other air purifiers above in the list with only mechanical air filters, the Medify MA-112 retains the signature air filtration system from its popular brother – the Medify MA-40.

  1. Pre-filter – A layer of pre-filter covers the True HEPA filter, to prolong the life time of the core filter, by trapping the large objects of pollutants like fur, hair and large dust.
  2. True HEPA filter – The True HEPA Filter (graded H13) that captures 99.97% of as small as 0.3 microns allergens, virus particles, pollen, mold and fungi particles.
  3. Activated Carbon filter – Uses substantial carbon filter with carbon pellets to remove toxic odors and formaldehyde.
  4. Ionizer – Produces negative ions to charge particles and trap them inside the unit. Can be switched on/off. Activated Carbon filter – Removes household odors and gases such as formaldehyde, benzene and nitrogen dioxide.

With these traits, the Medify MA-112 easily beats the Dyson DP04 in every versus test for air purifying. It can clean a large room in no time, and with the highest efficiency you could expect from an air purifier that normally costs you $200 higher.

The Medify MA-112 also features the Smart Sensor, to automatically detect the changes in indoor air quality, and adjust the fan speed accordingly.

Related post: Best air purifiers for bedroom.

Here is the pros/cons of Medify MA-112:


  • Large Room coverage: up to 2400 square feet
  • Great performance
  • Top-end design
  • Lifetime Warranty
  • Comes with Filter Club subscription


  • Low filter’s lifetime
  • High power consumption

Review: Medify MA-112 Review.

7) Alen BreatheSmart 75i – Best for Customer Service

 Previously in our list:   Alen BreatheSmart.

Alen is the first and the best air purifier brand that delivers a Forever Warranty – a policy to guarantee the rights of their customers, as well as show the absolute confidence in their products. After many years of manufacturing the HEPA-type devices, finally we have a True HEPA flagship from Alen – the Alen BreatheSmart 75i.

With a coverage of 1300 square feet, Alen BreatheSmart 75i is the best air purifier for large rooms from this company.

Also, the fan power is strongly improved from the predecessor, as Alen BreatheSmart 75i has a CADR rating of 347 cfm, and can exchange the air 5 times per hour.

best large room air purifier

Now, Alen BreatheSmart 75i can boast about its powerful 3-stage air cleaning system, with the core of a great True HEPA filter. In addition, the Alen BreatheSmart 75i still combines its mechanical filters with the ionizer to push the limit of trapping 99.97% of allergens as small as 0.3 microns. You can select one from the 4 different True HEPA filters, depending on your demand.

  1. Pure – The standard True HEPA filter of Alen BreatheSmart 75i, which is able to capture 99.97% of as small as 0.3 microns pollutant particles such as dust, dust mites and pollen.
  2. Fresh – The next level HEPA filter will improve the first Pure, with the addition of Activated Carbon filter, to deal with the household odors and chemicals. This air filter is necessary for people who are sensitive to VOCs.
  3. Pet – Without the Activated Carbon filter, the Pet air filter uses the Alen’s patented Molecular Conversion Powder to ensure  heavy pet odors are destroyed at a molecular level.
  4. Heavy Odor – Alen BreatheSmart 75i changed the Molecular Conversion Powder in the Pet air filter to make the new Heavy Odor filter, which can remove the household odors from smelly kids/teenagers, kitchen garbage, and other everyday activities.

Related post: Best air purifiers for pets.

This air purifier is extremely quiet thanks to WhisperMax technology, to generate pink noise to guarantee a peaceful sleep. No one could deny the importance of sleep, right? That’s why this is also one of the best air purifiers for large bedrooms.

Here is the pros/cons of Alen BreatheSmart 75i:


  • Large Room coverage: 1300 square feet
  • Great air filtration process, with True HEPA filter
  • Well-built with highest quality materials
  • WhisperMax technology
  • Lifetime warranty

  • Bigger than average air purifiers
  • High-range cost

Review: Alen BreatheSmart 75i Review.

8) Levoit LV-H134 – The Best Bang for the Buck

 Previously in our list:   Levoit LV-H133.

The 2021 air purifier from Levoit proves that this brand can really make the air purifiers targeting large rooms (over than 500 sq ft). In the most affordable list of best large room air purifiers, we have a $400 Levoit LV-H134 with a room coverage of 710 square feet, larger than the previous Levoit LV-H133.

This air purifier upgrades to a CADR of 312 cfm from the previous 135 cfm of Levoit LV-PUR131. We believe that this improvement for fan power will make Levoit LV-H134 one of the top-notch performers in this low-range segment.

best large room air purifier

As a large room air purifier, Levoit LV-H134 has no different air filtration system compared with previous models. We still have a 3-stage air filtration system as below:

  1. Pre-filter – This nylon pre-filter can capture airborne large objects like dust, pet dander, pet hair, lint and fiber. This pre-filter is mostly for maximizing the True HEPA filter life.
  2. True HEPA filter – A True HEPA Filter can reduce 99.97% down to 0.3 microns all contaminant particles like dust mites, allergens, pollen, and mold spores.
  3. Activated Carbon Filter – This Activated Carbon filter efficiently adsorbs smoke, odor, formaldehyde, VOCs and benzene.

Using a new technology, Levoit LV-H134 is more stable and more silent than even the air purifier for bedroom LV-H132. Also, this air purifier is one of the lowest energy-consuming air purifiers.

The Levoit LV-H134 utilizes the advanced laser sensor, for more accurate and quicker result of indoor air quality index, within only 30 seconds. Based on the result, the Levoit LV-H134 will monitor the right fan speed for your home.

Here is the pros/cons of Levoit LV-H134:


  • Large Room coverage: 710 square feet
  • Stunning performance rating
  • Solid-built
  • Very quiet
  • Low energy consumption

  • There is a bump in the price from previous models
  • Still the same CADR rating from Levoit LV-H133

Review: Levoit LV-H134 Review.

9) Blue Pure 121 – The most powerful air purifier for under $500

 Previously in our list:   Biota Bot MM608I.

It is normal to find 2 air purifiers from Blueair in any lists of best large room air purifiers, because the company is really dedicated in making air purifiers with high fan power. The Blue Pure 121 is only suggested for a room size of 620 square feet, but we all believe it is able to clean a much larger room with ease.

best large room air purifier

Blue Pure 121 still features the exclusive Blueair air purification system as below:

  1. Pre-filter – The fabric pre-filter of Blue Pure 121 is outside the air purifier and can catch the large particles. This pre-filter is washable and/or vacuumable.
  2. Particle filter – Instead of using a True HEPA filter, Blue Pure 121 uses a polypropylene fibers filter to help capture 99% of all allergens like dust, dust mites, pet dander, pollen and fungi (HEPA technology).
  3. Activated Carbon Filter – The Activated Carbon filter is added inside the Particle filter and effective against smoke, odors, gases and VOCs.

Though the Blue Pure 121 is a simple air purifier without any smart features, it is simply the most powerful air purifier for under $500, which is widely confirmed by many reputable air purifier reviewers in the world. It is rated by the Association of Home Appliance Manufacturers (AHAM) with a CADR rating of 400 Dust/ 400 Smoke/ 400 Pollen (cfm).

Related post: Best air purifier for mold.

Here is the pros/cons of Blue Pure 121:


  • Large Room coverage: 620 square feet
  • High-quality performance
  • Ease of use
  • Slightly quiet
  • 5-year warranty

  • No Smart features

Review: Blue Pure 121 Review.

10) Sharp FP-A80UW – Great value and performance

 Previously in our list:   Whirlpool WPPRO2000.

Sharp FP-A80UW is the last one in Breathe Quality’s best large room air purifiers list, and this air purifier comes from one of the most well-known electronics incorporation in the world – Sharp. With high fan power, Sharp FP-A80UW can cover up to 455 square feet.

This air purifier also comes with a great CADR rating of 303 Dust/ 293 Smoke/ 360 Pollen (cfm) and an ACH rating of 5X.

best large room air purifier

As a great performance air purifier in mid-range with a reasonable price in 2021, Sharp FP-A80UW will bring to you the signature 3-stage air filtration process:

  1. Activated Carbon filter – It helps reduce the pet odors and smoke, as well as some common household chemicals.
  2. True HEPA filter – The True HEPA Filter that captures 99.97% of as small as 0.3 microns particles like pollen, dust, pet dander, smoke, germs, bacteria, viruses, odors, mold, and fungus.
  3. Plasmacluster Technology – This technology is one kind of ionizer, which can further reduce the amount of pollutants. Can be switched on/off.

Out of the box, Sharp FP-A80UW will bring to you additional features like Smart Sensor. This air purifier has high efficiency of trapping airborne pollutants, thanks to the combination of True HEPA filter and Plasmacluster technology. The best part? The Sharp FP-A80UW is always on discount, and you can get this air purifier for much better price.

Here is the pros/cons of Sharp FP-A80UW:


  • Large Room coverage: 455 square feet
  • Powerful air filtration system
  • Decent fan power
  • Really silent

  • Only has 1-year warranty

Review: Sharp FP-A80UW Review.

Best Large Room air purifiers in 2021 Buying Guide

On this page, you’ll find everything you need to quickly make the right decision on which top rated air purifier to get for your large room. The most useful buying guide we could give you is to check the area (large room coverage) your air purifier can cover. Because if you are using a 200 sq ft air purifier for a, well, 500 sq ft space, even in the best ACH rating (Air changes per hour) your air purifier still can’t purify your room air. The outcome is the reduction of your air purifier’s filter lifetime, as well as energy wasting. We guess you understand why you need to find the most suitable air purifier for your large room thoroughly, right?

To ensure that your air purifier will work well, all you have to do is check the square footage rating of the device that you’re interested in buying. Then, compare it to the size of the room that you want to use it in. The device has a square footage rating that’s equal to (=) or greater than (>) the intended room size, then it’s a good choice. If not, DO NOT BUY THIS.

If you need a complete buying guide for your large room air purifier, for example you want to know about the technical specifications like ACH, CADR, you can read more here.

We hope our best large room air purifier list will help you choose your suitable air purifier in 2021. Thank you!

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