Best Air Purifier for Large Rooms

When it comes to choosing the right air purifier for your home, one of the most important things you have to take into consideration is room size. If you’re looking for an air purifier to cover wide, open spaces, then you’ll need one that’s built to do the job.

Large room air purifiers are air purifiers rated to cover rooms more than 500 sq. ft. in size. This means they’re able to purify the air in spaces like your living room, master bedroom, or basement with ease. Large room air purifiers are more powerful and durable than regular air purifiers and, as such, tend to cost more upfront.

Read our review of the best air purifiers for large rooms to find out which model is right for you!

Top Air Purifiers for Large Rooms

Product Features Price

Top Pick

1. Coway Airmega 400S

  • Washable pre-filter + Max2 filter (combined HEPA and carbon filter)
  • 1560 sq. ft. coverage area
  • Air quality sensor and indicator
  • 8-hour timer
  • Compatible with Amazon’s Alexa
  • 5-year Warranty
Check price on amazon

2. Alen BreatheSmart Classic

  • Pre-filter + HEPA filter + Carbon filter + Ionizer
  • 1100 sq. ft. coverage area
  • Intelligent sensor to monitor air quality
  • 15 Front Panel designs available
  • Customizable HEPA filter
  • Lifetime warranty
Check price on amazon

3. Whirlpool Whispure WPPRO200B

  • Pre-filter + True HEPA + Carbon filter
  • 508 sq. ft. coverage area
  • Smart auto mode and sleep mode
  • Air quality/VOCs sensor
  • Child safety lock
  • 5-year Warranty
Check price on amazon

Budget Pick

4. Envion Therapure TPP240

  • Permanent HEPA-type filter + UV lamp + Photocatalyst filter + Ionizer
  • 500 sq. ft. coverage area
  • Washable filters
  • 24-hour automatic timer, filter indicator
  • 3 cleaning levels to choose from
  • 1-year warranty
Check price on amazon

5. Levoit LV-H134

  • Pre-filter + True HEPA + carbon filter
  • 710 sq. ft. coverage area
  • Air quality indicator
  • Auto and sleep mode
  • Casters for mobility
  • 1-year warranty
Check price on amazon

6. SilverOnyx HEPA 5 Speed

  • Pre-filter + True HEPA + Carbon filter + Ionizer + UV
  • 500 sq. ft. coverage area
  • 5 fan speeds
  • Particulate matter sensor
  • Filter change indicator
  • 1-year Warranty
Check price on amazon

Large Room Air Purifiers Reviews

1. Coway Airmega 400S

The Airmega 400S from Coway is one of the most robust, well-designed air purifiers available today. Rated to cover up to 1560 sq. ft. of space, the widest coverage of all the air purifiers on this list. Aside from wide coverage area, the 400S boasts cutting-edge technology such as WiFi capability, compatibility with Amazon’s Alexa, and automatic air quality monitoring.

For such a high-performance device, it’s no surprise this model costs quite a pretty penny and is easily the most expensive on this list. If you’re not facing serious air quality issues at home and not looking to invest too much upfront, this model probably isn’t for you. For a cheaper Coway alternative, you can check out the Coway Airmega 300.

Regardless of what your needs are, however, the 400S has got your back. It has a ton of useful features and uses a powerful air filtration system so you get every bang for your buck. From performance to convenience to design, the Airmega 400S just ticks all the right boxes.

Pros

  • Max2 filter permits higher airflow and removes different types of air pollutants quickly
  • WiFi-capable, Alexa-compatible, comes with Airmega app
  • Automatic air quality monitoring and fan speed adjustment
  • Programmable timer and scheduler
  • Unique, modern design
  • Excellent for large areas
  • Long warranty

Cons

  • Expensive upfront and long-term
  • No casters

2. Alen BreatheSmart Classic

The Alen BreatheSmart Classic is a popular large room air purifier capable of servicing areas up to 1100 sq. ft. in size. What users love about this air purifier is that it’s very customizable: you have 15 front panel designs to choose from as well as 4 HEPA filters to choose from. You can choose a HEPA-Pure filter for dust and allergens, a HEPA-Silver filter for mold and bacteria, a HEPA-FreshPlus filter for chemical fumes and VOCs, and a HEPA-OdorCell filter for neutralizing odors.

As with most air purifiers on this list, the Classic is also expensive — even more expensive than the Coway Airmega 400S. Unfortunately, the high cost persists long-term due to its expensive replacement filters and high power consumptions. Fortunately, you get a lifetime support and warranty from Alen when you buy this!

Like the Coway Airmega 400S, the Classic also boasts a variety of features that allow you to conveniently set it and forget it: it has smart sensors to detect particles in the air and adjusts fan speed accordingly. If you’re struggling with different air pollutants, rest assured that the Classic is fully equipped to do all the work for you!

Pros

  • Customizable panel with several different colors/designs to choose from
  • Interchangeable filters to fit your specific needs
  • Smart sensors
  • Large coverage area
  • Lights-off mode
  • Automatic all day mode

Cons

  • Expensive upfront and long-term
  • Big and bulky

3. Whirlpool Whispure WPPRO200B

The WPPRO200B is the latest addition to the Whirlpool Whispure air purifier line and is currently their most high-performing model. It’s rated to cover large rooms up to 508 sq. ft. in size and uses three filters: a pre-filter, a True HEPA filter, and a carbon filter.

While not as expensive as the first two air purifiers on this list, the WPPRO200B is still relatively expensive and the same games for its replacement filters. This model also has a large footprint so you might need to move around some furniture at home to accommodate it.

The WPPRO200B has a wide range of different features such as a sleep mode, auto mode, and an optional nightlight. It’s quiet, energy efficient, and is backed by a long warranty from Whirlpool. The WPPRO200B is perfect for those looking for a mid-priced air purifier capable of servicing large areas!

Pros

  • Large coverage area
  • Energy Star certified
  • Air quality monitor with VOCs sensor
  • Sleep mode, auto mode, and optional nightlight
  • Timer up to 8 hours
  • Operates quietly
  • Great for removing household odors
  • Filter status monitor
  • Long warranty

Cons

  • Relatively expensive
  • Expensive replacement filters
  • Big and bulky

4. Envion Therapure TPP240

The Envion Therapure TPP240 is an affordable large room air purifier that is capable of purifying the air in rooms up to 500 sq. ft. in size. What’s interesting about this model is that it uses permanent filters that don’t need to be replaced! It uses a washable HEPA filter, UV light treatment, ionizer, and photocatalytic filter.

While its modest price tag makes it an attractive choice right off the bat, there are some drawbacks to the TPP240. The first is that it doesn’t use a True HEPA filter, only a HEPA-type one which is less efficient at removing small particles like allergens. Another design flaw is that it has a bright blue light that you can’t turn off, making it distracting for anyone who might be sleeping.

Overall, however, the TPP240 does a good job of removing common household air pollutants using different air purifying technologies. This is a great option for those on a budget looking to save money long-term. Despite being affordable, the TPP240 remains a reliable and effective device to help you combat air pollutants.

Pros

  • Affordable upfront and long-term
  • No filters to replace
  • Large coverage area
  • Can tackle a wide array of air pollutants such as allergens and germs
  • Optional UV light and ionizer
  • Timer up to 24 hours

Cons

  • Short warranty
  • Not durable
  • Very bright blue light on unit is distracting
  • Not a True HEPA filter

5. Levoit LV-H134

The LV-H134 is one of Levoit’s new air purifier models and is rated to cover up to 710 sq. ft. — the widest coverage we’ve seen from a Levoit air purifier yet! It uses an air filtration system quite similar to their massively popular LV-H132 which is comprised of a pre-filter, a True HEPA filter, and a carbon filter.

As expected, the LV-H134 is also relatively expensive both upfront and long-term because of its pricey replacement filters. Despite its high cost, however, Levoit is only giving buyers a measly 1-year warranty with this purchase which is off putting to say the least.

However, the LV-H134 does hold a lot of potential to succeed like its predecessor, the LV-H132, primarily because it has more smart features. Its key features include an air quality indicator, an auto mode and sleep mode, a 12-hour timer, and even casters for easier mobility! Its unique tower design also allows it to stand out among all the console-type air purifiers on this list.

Pros

  • Large coverage area
  • Unique, tower design
  • Air quality indicator
  • Operates quietly
  • Auto mode and sleep mode
  • Timer up to 12 hours
  • Casters for mobility
  • Great for both allergies and odors

Cons

  • Relatively expensive
  • Short warranty

6. SilverOnyx HEPA 5 Speed

The SilverOnyx HEPA 5 Speed is an affordable large room air purifier than has a bevy of useful features to give you more bang for your buck. Rated to cover up to 500 sq. ft., the HEPA 5 Speed uses a pre-filter, a True HEPA filter, a carbon filter, an ionizer, and UV light treatment to remove a wide array of household air pollutants.

One of the biggest complaints with this model is that it operates loudly, even on lower fan speeds. Because it’s so affordable and is only backed by a 1-year warranty, it comes as no surprise that several users have had issues with durability.

Despite these minor flaws, however, the HEPA 5 Speed definitely packs quite a punch with its comprehensive air filtration system and convenient features. On auto mode, you can rely on the HEPA 5 Speed to do everything on its own — from air quality monitoring to fan speed adjustments. You also have 5 fan speeds to choose from and a sleep mode.

Pros

  • Affordable
  • Large coverage area
  • Comprehensive air filtration system for a wide array for pollutants
  • 5 fan speeds to choose from
  • Auto mode and sleep mode
  • Timer up to 24 hours
  • More compact than other models/takes up less space

Cons

  • Operates loudly
  • Durability issues
  • Short warranty

Buyer’s Guide:

Air Purifier for Large Rooms

Determining Room Coverage

Before you go out and purchase an air purifier for your home, you should first determine the size of the room you’re planning to put it in. Normally, manufacturers measure room coverage in square feet. To determine the size of your room, just multiply the length and width of the room in feet. The result is the coverage area that you’ll need your air purifier to cover.

It is recommended, however, to pick an air purifier that has a room coverage that’s slightly larger than the room you’re using it in. This is just a precautionary measure and helps ensure that the air purifier is fully capable of cleaning the air in your home. When an air purifier is used in smaller rooms, it is able to cycle the air more times and work more effectively.

When you use an air purifier whose room coverage is smaller than your room size, it loses its effectiveness and struggles to purify the entire room. This means that you run the risk of leaving potentially harmful air pollutants floating around in your home.

The Importance of Air Changes (ACH)

ACH stands for air changes per hour and denotes the number of times an air purifier is able to completely cycle all the air in a room in an hour. The more air changes an air purifier produces, the cleaner the air in your home. For allergy sufferers and asthmatics, an air purifier capable of producing 4 to 5 ACH is more ideal as it ensures more allergens and irritants are removed.

Because of their wider coverage area, large room air purifiers are capable of more ACH than other types of air purifiers and are ideal for those suffering from moderate to severe air quality problems at home.

Benefits of Large Room Air Purifiers

  • Wider coverage

    With large room air purifiers, you get more room coverage which is generally more ideal regardless of your needs. Wider coverage means you have a more powerful air purifier designed to produce more ACH and handle different types of air pollutants.

  • Powerful system

    Because they’re designed to handle large rooms, this type of air purifier normally has a more robust air purification system and a more powerful fan.

  • Capable of more ACH

    As previously mentioned, large room air purifiers typically have more powerful systems that are capable of producing more ACH. This means it is able to clean the air more thoroughly and more quickly.

  • More features

    Large room air purifiers have more smart features than other types of air purifiers. These features typically include an auto mode, a sleep mode, an air quality indicator, and more. Some air purifiers, like the Coway Airmega 400S and 300S, are even WiFi capable with an app that allows you to control it from your mobile device.

  • Ideal for bigger families

    If you have a big family and pets, a large room air purifier would be more effective at removing air pollutants. The more inhabitants in a home, the more chances air pollutants are invited in. A large room air purifier will be able to handle higher pollutant concentrations with ease.

Disadvantages of Large Room Air Purifiers

  • Relatively expensive

    Because they are more powerful and robust, large room air purifiers are naturally more expensive upfront than other types of air purifiers. Long-term costs are also high due to more expensive replacement filters and higher power consumption.

  • Large and bulky

    Large room air purifiers are generally heavier and larger than regular air purifiers, thus taking up more floor space. If you’re interested in purchasing a large room air purifier, make sure you have the space for it at home!

  • Louder operation

    Large room air purifiers use powerful fans which tend to run quite loudly, even on lower settings. However, this doesn’t apply to all large room air purifiers and will ultimately depend on the model. Some large air purifiers, like the Alen BreatheSmart Classic, boast quiet operation.

Frequently Asked Questions

How do I choose an air purifier for my allergies?

When it comes to choosing an air purifier for allergies, it’s best to choose one that has a True HEPA filter which is the best at trapping allergens such as pollen, dust mites, pet dander, and mold. Ideally, it would have high CADR ratings to match as well as the ability to do several air changes per hour. Our pick for the best air purifier for allergies is the Coway AP-1512HH. Read our detailed review here.

How does an ionizer work?

An ionizer works by emitting a high concentration of negatively charged ions. These negatively charged ions attach themselves to positively charged ions like allergens, dust, and bacteria. By attaching themselves to these air pollutants, they become heavier and get weighed down. This causes them to fall to the ground and makes them easier to collect or clean up.

What is CADR?

CADR stands for Clean Air Delivery Rate and it is given in three measurements — each of them indicating the purifier’s performance when tackling a certain contaminant – a rating for pollen, a rating for dust, and a rating for tobacco smoke. It is an indicator of the quality of the air purifier’s performance which gives you the volume of filtered air provided by the purification system per unit time. The higher the CADR ratings, the better. For a more detailed explanation, you can read our article on CADR here.

Will an air purifier remove pet odors?

Yes, as long as you choose the right air purifier! When it comes to choosing an air purifier for odor removal, you will want an air purifier that has a dedicated carbon filter. Activated carbon or charcoal is excellent for removing odors coming from cooking, smoking, and pets. With that said, our pick for the best air purifier for odors is the Alen BreatheSmart Classic. Find out why in our review.

Is it safe to keep my air purifier running 24/7?

Yes, it is. Air purifiers are designed to run for long periods of time to ensure that the air remains as clean as possible. If you leave your air purifier off for 3 to 4 hours, you run the risk of allowing air pollutants to re-enter your home. If you are concerned about power consumption or wearing out your filters, you can run your air purifier on low.

Final Thoughts

Large room air purifiers are capable of servicing larger rooms in your house like your living room or master bedroom. These air purifiers are typically rated to cover upwards of 500 sq. ft. of space and have more features than other types of air purifiers. In general, they are more durable, robust, and powerful.

After searching high and low, we’ve found that the best air purifier for large rooms is the Coway Airmega 400S. Its impressive lineup of modern features as well as unique design sets it apart from the rest. Its extra large room coverage allows it cycle the air in most rooms with ease, effectively removing allergens, odors, VOCs — you name it!

If you’re not looking to invest in anything as expensive as the Coway Airmega 400S, then we highly recommend purchasing the Envion Therapure TPP240 or the SilverOnyx HEPA 5 Speed instead!

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