5 Best Large Room Air Purifiers – You Can Trust! (2023)

Keeping the air in your living space clean is very important. But, choosing the right one can feel impossible due to the handful of air purifiers that can be found on the market. You need to pay attention to certain factors depending on if you are looking for an air purifier for a large bedroom, living room, or other large room.

In order to help you not to waste your time and money, I’ve tested a lot of air purifiers and listed the top five for large rooms you can find out there. I have used parameters such as CADR, room coverage, filtration efficiency, quality, and the device’s advanced features to determine the best air purifiers.

Read on to find out more about the mentioned features, why they are so important, and why the five selected air purifiers on the list are the best to buy for large rooms.

5 Best Air Purifiers for Large Rooms

All the devices you’ll find in the best of the best list are high-quality, tried, tested, and reliable, and I’m sure that you won’t make a mistake, whichever one you choose. After countless hours of research and analysis, I have compiled a list of the best air purifiers for large rooms so that everyone can find the air purifier that suits them best.

Before I move on to the suggestions, I would like to point out that every air purifier on the list is bigger than you might be used to. You should think carefully about the air purifiers’ location in the room. You will be surprised how many air purifiers are bigger than they look in the pictures.

Blueair 121 – Minimalist But Powerful

The Blueair 121 is a minimalist air purifier without many advanced features but with highly efficient filters and extremely high airflow. All of that with a low energy-consuming motor that will save you money in the long run.

It uses a three-stage filtration system consisting of a pre-filter, a particulate filter, and a carbon filter, plus HEPASilent technology, an additional filtration stage. The filters are long-lasting and, on average, last for about 6 months.

This air purifier is modern, with a unique washable pre-filter available in 5 different colors. It weighs approximately 22.4 lb and measures 28.3 x 13 x 13 inches.

The Blueair 121 is best used in rooms up to 620 sq. ft., and in a room this size, the Blueair will clean the air 4.8 times in an hour. Additionally, in a 1465 sq. ft. room, it will clean the air two times; in a 2900 sq. ft. room, it will clean the air one time per hour. Basically, you can use this air purifier in larger rooms where the Blueair has an ACH (air change per hour) of less than 4.8x, but only if the air in the room is not heavily polluted.

This air purifier does not boast many advanced options. The only features I would like to mention are the filter reset indicator and the possibility of connecting to a smart plug.

Coway Airmega 400 – High-Quality Filters

The Coway Airmega 400 is a premium air purifier with advanced options. The ones I like the most are the air quality sensor, auto mode, and ECO mode options. The Airmega 400 air purifier is best used in rooms up to 550 sq. ft. In a room of this size, it has 4.8 ACH (Air Changes Per Hour), which means it will clean the air 4.8 times in one hour.

In addition, in a 1290 sq. ft. room, this air purifier has 2 ACH, while in a 2550 sq. ft. room, it has 1 ACH.

All in all, the Coway Airmega 400 is an extremely powerful air purifier that will easily clean the air in large rooms. Plus, it is very modern and stylish and will easily blend into almost any environment. It can be easily used in the bedroom because of its very quiet work.

The Airmega 400 uses 3-stage filtration technology that includes washable pre-filters, Green True HEPA filters, and activated carbon filters.

Levoit Core 600S – Smart and Innovative

The Levoit Core 600S is another Levoit air purifier on the list. This air purifier is designed for rooms up to 584 sq. ft. This air purifier will clean the air 4.8 times in one hour in a room of this size. While I would recommend using this air purifier in a 635 sq. ft. room, it is important to note that in a 1588 sq. ft. room, the Core 600S will clean the air two times in one hour, and in a 2665 sq. ft. room, the Core 600S will clean the air one time in 60 minutes of operation at maximum speed.

Like many other Levoit models, this one also has a low-power motor that does a great job filtering air and saving energy.

What I like about this model is having plenty of advanced options, including an air quality sensor, light sensor, auto mode, and the inevitable ability to connect to the VeSync smart app. The Levoit Core 600S uses 3-stage filtration technology, including a pre-filter, True HEPA filter, and activated carbon filter.

I would like to point out that VeSync is an excellent and very functional app. Connecting the Levoit Core 600S air purifier to this app opens up many new possibilities that can be very useful when using the device. I really like the ability to view the air quality by history, set the auto mode option, and have a detailed filter usage overview.

Medify MA-112 – Highest CADR

The Medify MA-112 is the air purifier with the highest airflow on this list. This air purifier has an ACH (Air Changes Per Floor) of 4.8 in an 865 sq. ft. room. In addition, in a 2050 sq. ft. room, it cleans the air two times, and in a 4100 sq. ft. room one time.

The Medify doesn’t boast many advanced options, but it is a very effective air purifier, and I’m sure you’ll notice a difference in the air after just a few hours of use. It uses a dual 3-in-1 filter, which is mounted on the sides.

The first stage of filtration is a pre-filter, the second stage is a True HEPA filter, and the third stage is an activated carbon filter. In addition, this air purifier has the addition of an ionizer that can be mandatorily switched on. The filters on this unit only last 4-5 months, which is definitely the shortest on this list. 

The extremely high airflow and the high-quality filters make the Medify MA-112 one of the best choices for a large room. Not to mention the benefits from easy-to-use features and ultra-quiet work at lower speeds.

Levoit LV-H134 – Large and Long-lasting Filters

The Levoit LV-H134 is a large air purifier that covers rooms up to 492 sq ft. To be honest, in my opinion, this air purifier is a bit too big, and I advise you to think carefully before you buy where you are going to put it. However, the fact that it is huge also means that it uses equally large filters, which are also very durable.

This Levoit air purifier has 4.8 ACH in a 492 sq. ft. room, 2 ACH in an 1160 sq. ft. room, and 1 ACH in a 2320 sq. ft. room. In the bigger rooms, ACH drops, which is normal and should not bother you.

This air purifier uses 3-stage filtration, including a pre-filter, a True HEPA filter, and an activated charcoal filter.

Of the features, I would definitely point out the air quality sensor, the air quality indicator, and the automatic mode as the most interesting and valuable features. If the size of this beast scares you, don’t be scared, this air purifier is fully certified and is absolutely safe to use.

And don’t think that this enormous air purifier will use much energy; it has only a 45W motor which means that it is energy star certified.

Overall, the Levoit LV-H134 is a high-quality air purifier that perfectly fits into large rooms.

What Makes an Air Purifier Good Choice for Large Rooms

From my point of view, many factors make an air purifier an exceptional choice for a large room. All the factors need to be summarized to determine whether one air purifier is the right choice to buy. To help forthcoming air purifier owners make the best choice for a large room, I have used the factors listed below to make my selection.

Size and coverage: The first thing to look for is whether the air purifier room coverage matches the size of the room you plan to use it in. Fortunately, the air purifiers I have chosen are the best in class. You will be very hard-pressed to find an air purifier that covers larger rooms of 865 sq. ft., the room coverage of the Medify MA-112 air purifier.

Filtration technology: Thus, you will find many air purifiers on the market that do not use conventional filtration but some other variations, such as washable filters or filter technologies, such as ionizer or UV filtration. However, as HEPA filters are known to be the most reliable, I have only listed the devices that have a HEPA filter in this article. To be a little more precise, all devices except the Blueair have a True HEPA filter, which can capture 99.97% of particles down to 0.3 microns in size. In addition to HEPA, many of the devices on the list also use a pre-filter and an activated carbon filter. Some, such as Medify, have a built-in ionizer as an additional level of filtration.

Efficiency: When you combine high-quality filters with high airflow, you get an air purifier combination that is highly efficient. This means that the True HEPA filter and the high room coverage also influence the choice of machine, especially as they all combine to give extremely high efficiency and outstanding performance.

Maintenance: This fact includes energy consumption, the cost of replacement filters, and the filters’ duration. Although it may not look like it at first glance, air purifiers can be very demanding and expensive to maintain, so I recommend everyone to check these facts thoroughly. In addition, I try to detail in each review how you can maintain your air purifier filters to extend their life.

Portability: As most air purifiers designed for large spaces use huge motors, making the devices huge, it is important to take the device’s size as a parameter when choosing the best one. I have noticed that the size of a device does not necessarily mean that it has the largest airflow. Many brands are coming up with new innovations that make air purifiers dimensionally smaller but not less efficient.

How Did We Determine the Best Ones?

In determining the best large-room air purifiers to buy, I researched efficiency, filtration technologies, price, brand reliability, maintenance costs, and other factors. Apart from the price and filtration technology, room coverage is one of the most important parameters when choosing the best air purifiers. The first air purifier on the list is designed for rooms of 620 sq. ft., while the device with the lowest room coverage on the list covers rooms up to 492 sq. ft.

Basically, all the air purifiers on the list are of high quality. They use high-quality filters, and only a few little things set them apart. I am very surprised at how much technology has advanced. Now motors with not-so-powerful outputs are powering large air purifiers and making such high airflow. All this has made it possible to now have medium-sized air purifiers on the market, but they are designed for very large rooms.

Personally, I like to use advanced options, and I like a device to have a lot of smart features, so I took that into account when choosing a device. However, I am also aware that some users are looking for minimalism, so you will find some minimalist air purifiers on the list without a lot of advanced options. If you are interested in the best smart air purifiers you can buy, I suggest you read the article I wrote on that subject.

Almost all air purifiers on the list use a True HEPA filter. In addition, they are all CARB certified, which means they do not produce illegal amounts of ozone and are safe to use.

What is the Coverage Area Of Large Air Purifiers?

Essentially, the point of large room air purifiers is to maximize the coverage of the room. This unit of measurement is defined by sq. ft.

Each air purifier has an airflow that is measured for each fan speed. The reference value is the Max Airflow, which is essentially the amount of air that the air purifier can process at its maximum speed. The airflow is specified in CFM values. Below, I will describe the two most essential air purifier space coverage characteristics.

CADR rating

The CADR (Clean Air Delivery Rate) rating is an AHAM-affirmed metric that informs us how well a certain air purifier catches air pollutants such as dust, smoke, and pollen. If you look at the list of air purifiers I’ve chosen as the best for large rooms, you’ll see that almost all have a CADR above 350.

I am always guided by the AHAM-verified values when I test air purifiers. I always take the AHAM recommended value as a reference for room coverage. Why? Well, because these are reliable tests and because AHAM is backed by tests for more than 400 different air purifiers. The recommended room coverage recommended by AHAM means that an air purifier in a room of the recommended dimensions will clean the air 4.8x, which means that the air purifier in that room has 4.8 ACH (Air Changes Per Hour). To better explain the metrics I have used to describe each air purifier, I first need to describe the ACH value.

4.8 ACH: The air purifier will clean the entire air in the room every 13 minutes, or translated, clean the air 4.8 times in one hour.

2 ACH: this means that the air purifier will clean the entire air in the room every 30 minutes, or translated, it will clean the air completely 2 times per hour.

1 ACH: this value means that the air purifier cleans all the air in the room once per hour.

FAQ on Large Room Air Purifiers

Final Thoughts

It can be challenging to make the right decision when buying the best air purifier for a large room in which you will use it, especially if you are confused with all the parameters that should be considered. The most important are the CADR and True HEPA filter, which you need to consider if you want to buy the air purifier that will do the job for you. With that, I tested many devices and presented the top five.

However, if you want me to make your choice even easier, I would point to the Blueair 121 and the Coway Airmega 400 as the two best devices.

The reasons why I singled out these two as the best are as follows. I recommend Blueair to people looking for minimalism in one device who don’t want to bother with many extra options but want a powerful air purifier that will really be up to dealing with dirty air in large rooms. On the other hand, I recommend the Coway for users looking for an air purifier with additional options that will make the device easier to operate and allow more advanced settings but still can successfully clean the air and work on its own thanks to the air quality sensor that will switch speeds depending from the current air quality in the room.