The Best Large Room Air Purifiers Reviews (over 500 square ft) – 2018 List

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. Therefore you need the best large room air purifiers for your needs.

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 (never) exaggerate one product just to let you click the links and buy that product blindly.

Important Note: If you have a small room (below 500 sq ft), we highly recommend you to read our list of the best rated air purifiers.

Related posts: 

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

Base Comparison Table of Top 7 Best Large Room Air Purifiers in 2018

This Comparison Table of the best large room air purifiers will help you have a quick overview of our list. The factor for comparison in this table is Filter Type of this air purifier, also we give the most concerned factors as Room Capability (of course you want 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 this comparison table. Just check the factors won’t help you know why we put these 7 as the best large room air purifiers.

ImageNameFilter TypeRoom Capability (sq ft)Annual Filter ReplacementsCheck Reviews
best large room air purifiersRabbit Air MinusA2 Ultra Quiet HEPA Air PurifierAdvanced BioGS HEPA, Ionic Filter, Carbon Filter815Rabbit FilterRead More
best large room air purifiersAIRMEGA 400S Air PurifierTrue HEPA Filter, Carbon Filter1560AIRMEGA FilterRead More
best large room air purifiersBiota Bot mm608I Large Room Air PurifierTrue HEPA Filter, Carbon Filter, Ionic Filter860Biota Bot FilterRead More
best large room air purifiersBlueair Classic 605 Air PurifierTrue HEPA Filter, Carbon Filter775Blueair FilterRead More
best large room air purifiersIQAir GC MultiGas Air PurifierTrue HEPA Filter, Carbon Filter1125IQAir HyperHEPA FilterRead More
best large room air purifiersAlen BreatheSmart Customizable Air PurifierTrue HEPA Filter, Carbon Filter1100Alen BreatheSmart FilterRead More
best large room air purifiersWhirlpool Air Purifier WPPRO2000 with True HEPA FilterTrue HEPA Filter, Carbon Filter508Whirlpool FilterRead More

Top 7 Best Large Room Air Purifiers List

1) Rabbit Air MinusA2 Ultra Quiet HEPA Air Purifier

Not only stay on the top of our best air purifiers list for 2018, Rabbit Air continues to be on top of this best large room air purifiers list with up to 815 sq ft in coverage.

Rabbit Air MinusA2 SPA-780N is their latest True HEPA Filter air purifier product. Looks like it is the one you would be proud to have in your room, with not only the stylish black and white but also the variety of design options, from Vincent Van Gogh, Claude Monet, Katsushika Hokusai to original designs by Rabbit Air’s creative team. What a perfect art!

best large room air purifiers

To take up less space, this air purifier can also be mounted on the wall. You can easily control this air purifier via an iOS app. Perfect for an air purifier in 5-star level hotel, right?

What makes this air purifier to be top 1 in the list of best large room air purifiers in 2018 is because up until now, Rabbit Air BioGS HEPA Filter is the best True HEPA Filter one manufacturer could provide. Combine with a pre-filter and a medium filter, BioGS HEPA Filter could remove 99.97% of even the tiniest of allergens, viruses, pollen, mold and fungi particles. The special part is, BioGS HEPA Filter will last longer than other typical True HEPA filter, claimed to last up to 2 years (while typical filters only last for 6 months to 1 year).

Expert tips: Only True HEPA filter could guarantee to remove most of the contaminant particles.

Light Sensor is also the function can only be found in high-end air purifiers. It automatically adjusts the fan speed settings of your MinusA2 air purifier. The ACH (air changes per hour) will change from 4 ACH in 350 sq ft of room coverage to 2 ACH in 700 sq ft area for normal use in an instant.

Ultra Quiet is truly a money feature of Rabbit Air MinusA2. The noise level from the highest speed is much lower than average air purifiers. Since one of your main reasons is to buy air purifier for a better sleep, Ultra Quiet is gold.

Related post: Best air purifier for bedroom.

Here is the pros/cons of Rabbit Air MinusA2


  • BioGS HEPA prolongs longer than typical True HEPA Filter
  • Wifi Capability Control
  • Can be either stand alone or to be mounted on the wall
  • Ultra Quiet
  • Smart Sensor
  • 5-year warranty


  • Overall price is high
  • No Android app for Wifi version – SPA-780N
  • No Timer

2) AIRMEGA 400S The Smarter App Enabled Air Purifier

With Smart Enabled Feature and a coverage of up to 1560 sq ft, AIRMEGA 400S Air Purifier is one of the best large room air purifiers today. That’s right, with an iOS or Android app, you can control this air purifier anywhere anytime. It allows you to monitor the air quality inside your home, see the status of the filters, schedule the timer, and even receive real-time outdoor air quality updates.

No matter how large your room is, AIRMEGA 400S still can cover. Coverage is up to 1560 sq ft. Huge, isn’t it?

best large room air purifiers

Eco Mode helps AIRMEGA 400S one of the most energy conserved air purifier. It depends on the air quality to change the fan speed.

This best large room air qualifier comes with an advanced set of air filter, with one pre-filter, one True HEPA filter and one Activated Carbon Filter to capture 99.97% of all other pollutants.

Related post: Best air purifiers for office.

Here is the pros/cons of AIRMEGA 400S


  • True HEPA Filter
  • Smart Enabled Feature
  • Eco Mode is great
  • Cover up to 1560 sq ft
  • 5-year warranty


  • The fan sometimes doesn’t work well
  • Smart app is quite bad

3) Biota Bot MM608I New and Improved Large Room Air Purifier

Biota Bot MM608I is the latest product of the well-known air purifier manufacturer. Basically this product is an upgrade version of the successful #MM208 for larger room, covers an area up to 860 sq ft.

Biota Bot MM608I still features their 7-stage air purification, with 4 filters as below:

  • Pre-filter: to remove larger particles like pet dander, hair and dust.
  • True HEPA filter: a certificate of True HEPA filter always guarantee the effective removal of 99.7% of 0.3 microns particles.
  • Activated Charcoal filter: to combat with odors and smokes.
  • Ionic filter: instead of using UV-C Light filter like Biota Bot #MM208, this new model will take use of an ionizer and can produce up to 10 million negative ions for your large room.

best large room air purifiers

Just like other high-end air purifiers, MM608I has Automatic Sensor to monitor air quality easily.

Related post: Best air purifier for allergies.

Here is the pros/cons of Biota Bot MM608I


  • True HEPA Filter, combine with Charcoal Filter and an UV Light Filter
  • Automatic Sensor works great
  • The Sleep Mode is a gold feature
  • 3-year warranty


  • Noisy at highest setting

4) Blueair Classic 605 Air Purifier

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

This Blueair Classic 605 was certified by Alexa Amazon, so you can control this product using your voice through selected Alexa devices. Cool, right?

But what really makes this air purifier to stay high in our list is because of its design for large room. Its size is quite bigger than average air purifier, with wheels for better mobility. That’s why it can cover a large area from 700 sq ft to 800 sq ft.

best large room air purifiers

Blueair Classic 605’s power is all from the great True HEPA filter. This True HEPA filter produces less noise than ever thanks to Blueair HEPASilent Technology. You will experience one of the most powerful HEPA filter (can capture 99.97% particles down to 0.3 microns) with almost no sound.

With 5 ACH (of course in max fan speed), your large room will always be fresh and sterile.

Expert tips: Normally you only get 1-year warranty for purchasing Blueair air purifier, but you can register for a maximum of 5-year warranty.

Here is the pros/cons of Blueair Classic 605


  • One of the best True HEPA Filter
  • HEPASilent Technology is gold
  • Smart Sensor to adjust fan speed
  • Control via Alexa device
  • 5-year warranty


  • May have bad smell

5) IQAir GC MultiGas Air Purifier

IQAir is a true giant in air purifier industry, the only to claim as the World’s Best HEPA Air purifier, with the foundation to be 50 years ago.

Therefore anyone who want to seek the best air purifier will definitely take a look for IQAir’s latest products. Today we will have a look at the product IQAir proudly claim to be the #1 Air purifier for smoke, odors and MCS – IQAir GC MultiGas.

GC MultiGas’s True HEPA filter is called HyperHEPA, guarantees to capture up to 99.5% of particles down to 0.3 microns. To test this air purifier against smoke, even IQAir president Frank Hammes stays in a full-smoke room with only GC MultiGas.

With a coverage of up to 1125 sq ft, IQAir GC MultiGas fits perfect for large room.

best large room air purifiers

Related post: Best air purifier for smoke.

Here is the pros/cons of IQAir GC MultiGas


  • HyperHEPA Technology
  • The output is 360 degree to direct air to everywhere
  • Very quiet
  • 5-year warranty


  • The price is the highest on the list

6) Alen BreatheSmart Customizable Air Purifier

The customizable air purifier from AlenCorp is not only standing in Breathe Quality’s best air purifiers list, with a coverage of 1100 sq ft, Alen BreatheSmart is perfect for a large room.

best large room air purifiers

Notice that, Alen BreatheSmart is the only air purifier in this list without True HEPA Filter. Instead, as AlenCorp said that they want to reduce the noise and the cost of air filter replacement, Alen BreatheSmart makes use of 4 different HEPA Filters:

  • The HEPA-Pure filter is the standard filter that captures most of the pet dander, mold spores and pollen.
  • The HEPA-Silver filter is perfect for mold, germs and asthma related concerns.
  • The HEPA-FreshPlus filter to remove smoke, VOCs and heavy chemicals.
  • The HEPA-OdorCell filter can neutralize pet and diaper odors.

Just like other high-end air purifiers, Alen BreatheSmart uses Smart Sensor to automatically adjust the air quality in your room, therefore saving energy and maximizing the filter life.

Target directly in air purifiers for large bedroom, Alen BreatheSmart possesses WhisperMax technology, to generate soothing sound to guarantee a peaceful sleep. No one could deny the importance of sleep, right?

Here is the pros/cons of Alen BreatheSmart


  • 4 HEPA Filter for 99% removal of dust and allergens
  • Customizable color options
  • Very quiet
  • SmartSensor is great
  • Lifetime Warranty


  • No True HEPA Filter
  • High cost
  • Bigger than average air purifiers

7) Whirlpool Air Purifier WPPRO2000

Whirlpool WPPRO2000 is the last one in Breathe Quality best large room air purifiers list. This latest technology air purifier is the only one you can find for Auto Air Quality Monitor with Whirlpool brand, to help you adjust the cleaning power for saving energy. The indicator for Air Quality Monitor has three colors: blue/yellow/red.

With 4 Fan Speed Settings, Whirlpool WPPRO2000 air purifier can cover up to 508 sq ft.

best large room air purifiers

With a True HEPA filter combining with Activated Carbon filter, this air purifier is perfect at capturing 99.97% of dust and allergens such as household dust, pet dander, mold spores and plant pollen. Whirlpool WPPRO2000 also features Quiet Partner System to ensure the quietest sound during your sleep or work.

Here is the pros/cons of Whirlpool WPPRO2000


  • True HEPA filter with Activated Carbon filter to remove dust, pollen, pet dander and odors.
  • Auto Air Quality Monitor with light indicator
  • Quiet Partner System works great
  • 5-year warranty


  • The air purifier is somehow heavy

Best Large Room air purifiers 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 (room capability) 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 (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 life time, 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. Thank you!

The Best Large Room Air Purifiers Reviews (over 500 square ft) – 2018 List
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