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7 Best Air Purifiers for Large Rooms

The increasing level of pollution in the air, both indoor and outdoor, is becoming a major issue nowadays. Since indoor air does not circulate as much as outdoor air, many air pollutants grow inside.

However, an air purifier can help you with this problem. It can freshen up stale air, which helps decrease the risk of health diseases that are caused due to indoor air pollution.

Air Purifiers are designed to remove contaminants from the air around your home. When using an air purifier, you should ensure that you purchase one that is adequate for the size of your room. Below we will review the best air purifiers available for large rooms.

Best For Large Rooms
Medify Air MA-112 Air Purifier 

Medify Air MA-112 Air Purifier 

  • Coverage: 1,000 sq ft 5 times hourly
  • Particle Removal: 99.9% down to 0.1 microns
  • CADR: 560 CFM


Best Performance
AirDoctor 5500 Air Purifier

AirDoctor 5500 Air Purifier

  • Coverage: 868 sq ft 5 times hourly
  • Particle Removal: 99.9% down to 0.003 microns
  • CADR: 560 CFM

Read Full Review

Alen BreatheSmart 75i Air Purifier 

Alen BreatheSmart 75i Air Purifier 

  • Coverage: 520 sq ft 5 times hourly
  • Particle Removal: 99.9% down to 0.1 microns
  • CADR: 347 CFM

Read Full Review

Smart Air Purifier
Coway AirMega 400 Air Purifier 

Coway AirMega 400 Air Purifier 

  • Coverage: 624 sq ft 5 times hourly
  • Particle Removal: 99.9% down to 0.01 microns
  • CADR: 328 CFM

Read Full Review

Smart Auto Cleaner
Okaysou Apollo 818 True-HEPA Air Purifier 

Okaysou Apollo 818 True-HEPA Air Purifier 

  • Coverage: 300 sq ft 5 times hourly
  • Particle Removal: 99.9% down to 0.3 microns
  • CADR: 200 CFM
HATHASPACE Smart Air Purifier 2.0

HATHASPACE Smart Air Purifier 2.0

  • Coverage: 300 sq ft 5 times hourly
  • Particle Removal: 99.9% down to 0.3 microns
  • CADR: 260 CFM

Read Full Review

Levoit LV-H133 Tower Air Purifier

Levoit LV-H133 Tower Air Purifier

  • Coverage: 411sq ft 5 times hourly
  • Particle Removal: 99.9% down to 0.3 microns
  • CADR: 274 CFM

The Best Air Purifiers for large rooms should be able to remove 99% of all impurities from the air; they should also have an extended warranty period of at least five years, and they should be cheap and easy to maintain.

Best Air Purifiers for Large Rooms 

1. Best Air Purifier For Large Rooms: Medify MA-112 

Medify MA-112 Air Purifier Review

The Medify MA-112 v2.0 air purifier is a modern and sleek device that comes in two colors: white and black. Here are some of its most notable features.

This Medify MA-112 air purifier has a larger body, carrying twice as many air filters. That is why it is the best purifier for a large room. This air purifier has a width of 15.7 inches and a height of 28.3 inches.

The Medify MA-112 v2.0 air purifier contains three filters, the activated carbon filter, prefilter, and True HEPA filter. The Medify MA-112 Air Purifier’s activated carbon filter is included in the composite filter to neutralize VOCs and odors.

This layer of the air purifier has activated carbon pellets instead of an impregnated-type filter. These carbon pellets are more efficient and can capture odorous and gaseous substances with the help of the thousands of spores present in them. As a result, you can breathe toxin-free and particle-free air.

According to the Energy Star certificate, the Clean Air Delivery Rate, or CADR Rating, for the Medify MA-112 is 560 CFM.


  • It is available in two colors.
  • It has a modern touch control panel.
  • It comes with a child lock feature.
  • It has a sleep mode.


  • It has no smart control.
  • It has no auto mode.

2. Best Performance: Air Doctor 5500 Air Purifier 

AirDoctor 5000 Air Purifier

The AirDoctor 5500 is an air purifier device that promises to remove 99.9% of airborne pollutants as small as 0.003 microns. No other large spaces air purifier can capture such small particles. 

The medium-sized air purifier features a 3-stage purification system that can clear the air in rooms up to 868 square feet 5 times per hour. 

It also has many smart features, such as real-time particle sensors measuring air quality and automatically adjusting the fan speed. That way, you can save energy.


  • Ultra Lock Space Technology
  • Auto Sensor With Air Quality Indicator
  • Automatic Mode
  • 24-Hour Timer
  • Stylish Design


  • No Remote

3. Quietest Large Room Air Purifier: Alen BreatheSmart 75i Air Purifier

Alen BreatheSmart 75i Air Purifier Review

The Alen BreatheSmart 75i True-HEPA Air Purifier is one of the most efficient air purifiers. This energy-efficient and powerful purifier cover up to 1,300 square feet per 30 minutes. Or 520 sq. ft. 5x per hour.

The Alen BreatheSmart 75i uses a single combination filter within the air purifier to purify the air. This air purifier has different filters you can choose according to your requirements. Three different filters are available: Allergies, Odor + Allergies, and Allergies + Smoke + Odor.

The Allergies + Odor + Smoke filtration system is the most effective and complete, including an activated carbon filter, HEPA filter, and pre-filter. These filters provide complete spectrum protection against all forms of pollutants.

The BreatheSmart 75i allows five fan speeds to choose from. The air purifier produces a sound that ranges from 25 to 49 decibels depending upon the speed of your fan.

The sound level of 25 decibels is similar to whispering at a distance of a few feet; therefore, it will not wake you up while you sleep. The sound level of 49 dB is comparable to that of a refrigerator.

Many users may be able to sleep through it without difficulty. The sound that BreatheSmart 75i produces is Pink noise. This noise has a lower frequency and is thought to promote better sleep.


  • It is ideal for large rooms.
  • It comes with a lifetime warranty.
  • It contains air quality sensors.


  • The Alen BreatheSmart 75i is expensive as compared to other air purifiers.

4. Smart Air Purifier: Coway Airmega 400 

Coway Airmega 400 Smart Air Purifier Review

The Coway Airmega 400 Smart Air Purifier is an excellent choice for large rooms and comes in two colors: silver and graphite. When used as directed, the Coway Airmega 400 room air purifier detoxifies at least twice an hour and can cover rooms up to 624 square feet based on 5 air changes per hour.

The Coway Airmega 400 room air purifier contains two levels of filtration. These filters can catch 99.97% of air pollutants, such as noxious fumes and volatile organic compounds, even as small as 0.01 microns.

The noise level of this air purifier varies between 22 and 52 decibels (dB). So despite having a higher fan power, the Coway Airmega 400 is quiet and would not disturb your sleep.


  • It is energy efficient.
  • It comes with a five-year warranty.
  • It is WIFI compatible.


  • Heavy and Large size

5. Smart Auto Cleaner: Okaysou Apollo 818 True-HEPA Air Purifier 

Okaysou Apollo 818 True-HEPA Air Purifier 

Okaysou is one brand that misled consumers when telling their air purifier capacity. For example, this model is a 1,500 sq. ft. model. Well, in reality, that’s with 1 air change per hour.

Recommended is 4-5 air changes per hour, so when we calculate it to 5 air changes per hour, it can cover only 300 square feet of area.

Okaysou Apollo 818 comes with four stages of filtration, including a pre-filter, activated carbon filter, HEPA filter, and UVC light to provide fresh air for your home or office.

It has the best technologies – an air quality sensor measuring air quality in real-time and auto mode adjusting fan speed in real-time.


  • It weighs 6.6 lbs.
  • Certifications like CE, ETL, CARB
  • Sensitive Auto-Mode
  • Low Energy Consumption
  • Real-Time Air Quality Indicator
  • Intelligent Air Quality Sensor


  • Not made of the best quality materials
  • Small motor

6. HATHASPACE HSP002 Smart Air Purifier 2.0 

HATHASPACE Smart Air Purifier 2.0

No more wondering whether or not your family is breathing clean air—the HATHASPACE Smart Air Purifier 2.0 makes it easy to see when it’s time to turn on the cleaner and live better.

Hathaspace does the same as Okaysou advertising their air purifiers as they cover extra large areas. At least this brand tells people that this large coverage is by cleaning the air 1 time per hour. It is ideal for rooms up to 300 square feet, cleaning air five times an hour. 

It is very large in size and heavy. And for such a size, I would like to see more powerful purification. It has a pre-filter, H13 HEPA filter, and carbon filter, cleaning 99.97% of airborne particles as small as 0.3 microns.


  • Sleek and Modern Design
  • 5 Stage Purification
  • Certified Energy Star
  • Medical Grade H13 HEPA Filter
  • 100% ozone-free, CARB approved, Energy
  • Particle sensor, AQI display


  • Not Wi-Fi or app-enabled
  • The CADR is not AHAM verified

7. Levoit LV-H133 Air Purifier

Levoit LV-H133 Air Purifier Review

It is an ideal air purifier that filters particle and gaseous air pollutants without creating ozone or other potentially dangerous byproducts. That is why Levoit LV-H133 is the safest option.

This air purifier contains three filters: a true HEPA filter, a pre-filter, and an activated carbon filter. The prefilter carries huge air pollutants such as dust, hair, lint, and pet fur.

The Levoit LV-H133 Air Purifier’s true HEPA filter catches and eliminates smaller particles up to 0.3 microns. Last but not least, there’s an activated carbon filter. Thanks to its granular activated carbon structure, this filter absorbs cigarette smoke, household scents, kitchen odors, and VOCs.

The Levoit LV-H133 Air Purifier is best for large rooms and can cover 411 sq. ft. large spaces 5 times per hour.

The noise level of this air purifier does not surpass 54 dB. This is the sound of an average home conversation or numerous huge electrical transformers at a distance of at least 100 feet.


  • It has low noise levels.
  • It has air quality sensors.
  • The air filter contains a built-in display.


Large Space Air Purifiers Buying Guide

Here are some necessary and ideal things to consider when buying an air purifier for a large space:

Size of the Air Purifier: Make sure the unit is big enough to purify the space you want clean. A minor team may not do the job well enough. Look for a cleaner with at least three filters and one that has an adjustable fan speed setting.

Number of Filters: Some air purifiers have more than one filter. You need to decide and choose what type of filter you want before buying a new one. You can find models with HEPA filters or carbon filters to help remove dust mites from your home.

CADR Rating. If you have a space of up to 1,200 square feet, then an air purifier with a CADR rating of between 300 and 400 will be able to cleanse your area effectively. CADR means: Clean Air Delivery Rate measures the amount of filtered air an air cleaner provides per minute. The higher the CADR, the better the performance of your purifier.

Noise level. It is important because a more expensive unit does not necessarily mean you will get a quieter machine. If the equipment has a higher noise output, it can be hard to hear someone talking from across the room.

air changes per hour (ACH). The ACH rating on your air purifier measures the number of times it will circulate the air in your room in an hour. The more air changes per hour, the preferred. Ideally, you want a minimum ACH rating of five for this size room.

How Large Area Can an Air Purifier Cover? 

If you are planning to buy an air purifier for your large room, make sure to buy a large one. A small air purifier won’t cover much surface area in your room, which would kill the reason behind buying it.

While on the other hand, a large air purifier can cover a 500 to 1000 sq ft area. That is why a large air purifier can purify the air perfectly.

7 Best Air Purifiers for Large Rooms Reviewed [+Buying Guide]

Benefits Of a Large Room Air Purifiers

Air Purifiers are vital to those living with allergies or asthma. But getting rid of airborne toxins can be challenging if you have ample space or live in a climate where windows are seldom opened. So it’s time to invest in a large room air purifier.

 Here are some benefits of having a large room Air Purifier:

  • You’ll get cleaner air quicker. You can get away with using a smaller air purifier in a small space. However, it will take longer for the same level of cleaning to happen in larger areas. A giant room air purifier will clean the space faster so you can breathe easier sooner.
  • You’ll save money in the long run. While an air purifier may have an upfront cost, it will be cheaper than medical bills and over-the-counter allergy medications over time. In addition, air purifiers do preventative maintenance on your health, which is always less expensive than corrective treatments after symptoms appear!

Large Room Air Purifiers FAQ

Do air purifiers work in large rooms?

Any air purifier can remove dust, pollen, and other contaminants from the rooms in which they are installed. However, you must ensure that the air purifier you purchase is appropriate for the size of the space.

If you buy the improper air purifier model, the air in the room will most likely not be cleaned effectively.

It relies on the air purifier’s power and how much space it is equipped to clean.

Can an air purifier be too big for a room?

If the air purifier’s capacity or CADR rating is too large for your space, it will cause issues. If the CADR rating of the air purifier you’re contemplating surpasses the room area by a significant amount, it might be too large for your room. Getting an air purifier with a good CADR rating is always preferable.

That is, having a slightly larger air purifier is preferable to having one that is too small for your room. If you try to save money by buying an air purifier that is too tiny for your space, you will be defeating the device’s purpose.

The purifier will not filter the indoor air to an acceptable level. On the other hand, an air purifier device with a CADR rating slightly larger than your room size will operate flawlessly.

How many square feet can an air purifier cover?

Small Air Purifier: Standard for personal spaces and rooms up to 200 square feet. 

Medium Air Purifier: Ideal for rooms between 200 and 400 square feet.

Large Air Purifier: Best for rooms between 400 and 1,500 square feet. 

For example, if you want to use an air purifier in your bedroom with a closed door and windows, it’s essential to know how big that room is and how tall the ceiling is. For example, if the room is 12 (twelve) feet by 15 feet with 8-foot ceilings, you would need an air purifier that covers 240 square feet or more because something like this would allow for enough absorption of all particles in the air.

Will a small air purifier work in a large room?

Small air purifiers are only suitable for spaces that are less than 300 square feet in size. If the room is any larger, you’ll need a more powerful air purifier. A small air purifier will not complete the job. For rooms with less area, small air purifiers may be sufficient.

Even if your bathroom is small, you can consider using an air purifier. A small air purifier will only work well in a larger room if numerous similar air purifiers are positioned in various corners of the room.

Multiple tiny air purifiers in one location can outperform a single large air purifier at a high cost. Therefore, a small air purifier can work in large rooms only if the purifier capacity is matched to the size of the space in which it will be used.

Therefore, purchasing an air purifier smaller for the size of your room will be a waste of money as it won’t work efficiently.

Can you use 2 air purifiers in a large room?

Yes, you can, but the only thing to remember is that each air purifier is meant to cover specific square footage, so putting two devices in one room that are too efficient to clean is a waste of money.

To avoid high costs, ensure that the coverage area is large enough to support two or more air purifiers. Furthermore, both air purifiers should use different filtration processes.

Is it better to buy a bigger air purifier?

It would be best if you always chose the air purifier that goes with the size of your room. If your room is small, go for a small air purifier; if it is large, you must buy a large one to get maximum results.

A small air purifier would not efficiently work in a large room, killing its purpose. That is why you must first determine the room’s accurate size you wish to purify before selecting the appropriate air purifier size. Then you’ll want to get an air purifier that meets or exceeds those requirements.

For the purest air, choosing the proper air purifier size is critical. An air purifier can technically be too large for a room. It will, however, clear the air effectively.

How long does it take for an air purifier to clean a room?

Cleaning a room with an air purifier might take 45 minutes to two hours. You must consider the air purifier’s purifying coverage, room size, and fan speed to better estimate how long it will take to cover a space. While some air purifier companies claim that a whole room’s air may be purified in as little as 30 minutes.

However, this is only possible in small rooms. At the same time, an air purifier in a large room will take more time. That is why it’s fair to expect the air to clear out after at least 45 minutes.

Does an air purifier make air dry?

An air purifier doesn’t eliminate moisture from the air. It can, however, make the air feel drier, mainly if your air purifier is too big in size for your room or is operating too fast. In the winter, air purifiers are frequently utilized to substitute ventilation.

However, because chilly winter air is usually dry, the air cleaner is not to blame for the dryness. The air purifier can only trap pollutants such as dust, pet hair, mold, pollen, and so on; it can’t remove moisture from the air. When the indoor air is cold, low humidity is more typical.

Final Thoughts

If you are planning on buying an air purifier for a large room, you must go through this guide and consider every detail that can help you make the right choice.

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