Best Large Room Air Purifiers (Reviews & Buying Guide)

best large room air purifiersDo you have a large room in your home or office that you’re trying to improve the air quality in?

Are you looking for the best air purifier for large spaces that can get the job done well?

If so, you’ve come to the right place.

When it comes to shopping for the best air purifier for large room areas, the process is slightly different than when looking for a smaller unit.

To get the right air purifier for your needs, you need to know what features to look for in a large room air purifier and make sure that it has enough power to keep the air around you clean.

And that’s exactly what you’ll find on this page.

Below, is a comprehensive guide on how to choose a good air purifier for large rooms that not only has powerful air filtration, but also meets your individual needs, and budget.

Best Large Room Air Purifier Comparison Chart

Here’s a chart showing a comparison between the top products.

We’ll go more in depth about each one later in this guide, but this gives you a sense of what’s available and an easy way to quickly compare them.

ImageAir Purifier DetailsPrice
AIRMEGA 400S Air Purifier
  • Best smart air purifier for the largest rooms
  • Includes a dual air intake system with two True HEPA filters and two Activated Carbon filters to capture particles down to 0.3 microns
  • Covers 1,560 square feet
Check Price
Medify MA-112 Air Purifier
  • Offers adjustable air filtration coverage
  • Includes a dual air intake system with two HEPA filters and two Activated Carbon filters
  • Covers 1,250 to 3,700 square feet
Check Price
IQAir HealthPro Plus Air Purifier
  • Has the most advanced HEPA filter
  • Includes a HyperHEPA filter and V5-Cell Odor & Gas filter to trap particles down to 0.1 microns
  • Covers 1,125 square feet
Check Price
Alen BreatheSmart Air Purifier
  • Powerful air purifier with a customizable front cover panel
  • Includes a True HEPA filter with 4 options: Pure, Silver, Fresh Plus & Odor Cell
  • Covers 1,100 square feet
Check Price
Rabbit Air MinusA2 Air Purifier
  • Has the most advanced six-stage air filtration system
  • Includes a Pre-filter, BioGS HEPA filter, Medium filter, Custom filter, Activated Carbon filter and Ionizer
  • Covers 700 square feet
Check Price

Top Features to Look for in the Best Air Purifier for Large Spaces

The goal of every best home air purifier is to remove particles from the air that can have a negative impact on your health or cause bad odors.

How the air purifier accomplishes those tasks will vary from brand to brand.

You see, no two air purifier manufacturers create their units in the same way, and each one cleans the air in various ways.

Every air purifier brand also offers a wide range of features in their particular models.

Despite the fact that every air purifier is different, there are some things you should be looking for when it comes to finding the right air purifier for a large space.

These top features include:

True HEPA Filter

To ensure that you’re removing the most harmful airborne particles, you need an air purifier that’s equipped with a True HEPA filter.

There are many different types of HEPA filters available, but only a True HEPA filter is certified to remove 99.97% of particles down to 0.3 microns in size from the air.

While other HEPA filters will remove contaminants, they may only be rated to trap particles that are 2 to 5 microns in size.

And that difference is what makes standard HEPA filters far less efficient than a True HEPA filter kind.

Some of the particles that a True HEPA filter has the capability of trapping include:

  • Dust
  • Visible smoke
  • Allergens
  • Mold spores
  • Pet dander
  • Pollen
  • Some bacteria

Removing these pollutants from the air can have a huge impact on your indoor air quality.

To ensure that you’re getting the most out of your new large room air purifier, only settle for one that includes a True HEPA filter.

Activated Carbon Filter

The best air purifier for large spaces is also one that can remove bad odors, toxic chemicals, and gaseous vapors from the air.

And that’s where an Activated Carbon filter comes in.

While True HEPA filters are amazing at removing microscopic particulates, hey can’t get rid of smells or gases.

Whether those smells are caused by cooking, mold, visible smoke, or pets, and Activated Carbon filter can take care of it, making the air in a large space smell fresh and clean.

This special type of air filter also has the ability to remove volatile organic compounds (VOCs) from the air.

These compounds are found in a variety of different products, including paints, cleaning products, office equipment, furniture, carpeting, and others.

In some cases, you may not even realize that VOCs are invading your space, as they are often odorless.

Even though you can’t smell them, they can still have an impact on your health because they’re toxic gases.

Breathing in VOCs could result in headaches, fatigue, or respiratory issues.

Thus, having an air purifier with an Activated Carbon filter is your best line of defense when it comes to removing these compounds from a large room in your home or office.


Not every air purifier will have an Ionizer, but it’s a good feature to look for when cleaning the air in a large room.

The role of an Ionizer is to knock pollutants out of the air at an incredibly fast rate and extend the life of the filters inside your air purifier.

It’s an advanced technology feature that increases the cleaning power of the air purifier unit.

An Ionizer works by emitting negatively charged ions into the air that latch onto various particles and contaminants.

These ions weigh airborne particles down, which causes some of the pollutants to more easily get sucked into the air purifier’s filters.

If these pollutants don’t get trapped in the filters, they’ll fall to the ground where they can’t be breathed in or stick to various surfaces.

You don’t necessarily need an Ionizer on your large air purifier, but if you’re looking for a way to make the unit more powerful and effective in large spaces, then it’s a nice feature to have.

Smart Wi-Fi Control

Today, most home appliances are coming with smart Wi-Fi controls.

People enjoy being able to control appliances from their smartphone or other mobile device, and with the right air purifier, you can do this as well.

In addition to being able to turn your air purifier on and off from anywhere in the world, you can also use the included mobile app to get real-time air quality reports and alerts and create personalized air cleaning schedules for every day of the week.

Having a smart air purifier in a large room is a good thing for anyone who wants complete control over their unit and up-to-date information on how polluted or clean the air is the space.

Square Feet Coverage

When it comes to finding the right air purifier for your needs, you need to find an air purifier that can cover your entire large room.

To do that, you need to look at the square feet coverage of the unit.

If you get an air purifier that’s too small for the space, it won’t have enough power to clean and purify the air well.

Thus, if the air purifier you choose is rated to cover rooms up to 500 square feet in size, but your room is 1,200 square feet, your air purifier unit won’t clean the air efficiently.

On the other hand, if you get an air purifier that’s too large for the space, then you could be wasting unnecessary money on the initial purchase.

Sure, a large air purifier will do a good job of removing airborne pollutants, but it may cost you more money than you needed to spend on a high-quality unit.

In each of our air purifier reviews below,  you’ll find the total square footage coverage for each unit. That way, you can find the exact model for your needs.

Best Large Room Air Purifiers List

There are literally hundreds of different air purifiers on the market that you can choose from.

But not every model is good for large rooms or works well in the long-run.

After giving you an idea of some of the top features to look for in a high-quality device, we can now dive into some of the best air purifier for large spaces.

Out of all of the models available today, these are the top products you can pick.

We’ll start with the largest air purifier for the largest spaces and and work our way down.

1. AIRMEGA 400S (Best Air Purifier for the Largest Rooms)

Covers 1,560 square feet

If you’re looking for a smart air purifier with Wi-Fi control that can handle the largest space, then this might be the right air purifier for you.

The AIRMEGA 400S contains an Advanced Max2 filter set, which is a combination of two powerful air filters that consist of:

  • A True HEPA filter that remove 99.97% of airborne pollutants down to 0.3 microns in size (i.e. dust, allergens, mold spores, pet dander, smoke, bacteria, etc.)
  • An Activated Carbon filter that captures 99% of odor-producing molecules as well as toxic VOCs that might be floating around your indoor air.

This air purifier also has a dual intake air filtration system, so it draws air in from both sides to maximize efficiency and performance.

You can also control every aspect of this machine from a smartphone or mobile device. Get real-time air quality alerts, create air cleaning schedules, and more.

There’s also a standard AIRMEGA 400 model without Wi-Fi control if you want to save a little bit of money or don’t need that added feature.

With the ability to cover so much room size and square footage, this is a good air purifier choice for master bedrooms, basements, combination living/dining rooms, conference rooms, and any very large space in your home or office.

See Amazon Reviews

2. Medify MA-112 (Adjustable Size Large Room Air Purifier)

Covers 1,250 to 3,700 square feet

Perhaps you want an air purifier that can adjust to the exact size room you need it in.

If so, this is a good air purifier to consider.

This unit can work extremely fast to clean the air in a 1,250 square feet room in as little as 15 minutes. That’s a total of 4X air changes per hour (ACH).

Or, you can put it in a large room up to 3,700 square feet and having the full volume of air cleaned in about 1 hour.

For rooms that are any size in between, you can expect about 30 to 45 minutes to remove airborne pollutants, which is about 2-3X air changes per hour.

The powerful and thick air filters included with this air purifier include:

  • Two Medical-Grade True HEPA H13 filter which is the second best type you can get to remove 99.95% of airborne particles down to 0.1 microns. The highest class you can get is an H14 filter which is super rare to find.
  • Two Activated Carbon filters to reduce airborne odors, gases, and volatile organic compounds (VOCs) from the air you breathe.

This air purifier also has a dual intake air filtration system, which is why this unit is so fast at cleaning the air in large rooms.

It also comes with a touch-screen panel, four fan speeds, an Ionizer function that can be turned on and off, a sleep mode, a child lock, and an 8-hour timer that can be set to run for 1, 2, 4, or 8 hours.

This air purifier is also CARB, ETL, and Energy Star certified, and comes with a lifetime warranty.

See Amazon Reviews

There’s not much else you can ask for in a top air purifier such as this.

3. IQAir HealthPro Plus (Most Advancted HEPA Air Purifier)

Covers 1,256 square feet

This air purifier is heavily marketed to people who suffer from severe allergies or asthma, but it can also be used by anyone who wants to experience clean, fresh air in their home or office.

Similar to our last pick, this air purifier also has a Medical-Grade HEPA filter, but it goes by a different name, “HyperHEPA”. It also includes a high performance Activated Carbon filter that goes by its own name as well.

Here are the exact specifications for the air filtration system:

  • An Advanced HyperHEPA filter – This amazing filter lasts up to 4 years and can trap 99.95% of particles down to 0.003 microns in size, which are the smallest particles that exist. That’s 100x more efficient than a standard True HEPA filter.
  • A V-5 Gas and Odor filter – This filter lasts up to 2 years and traps the most odors and toxic gases that come from VOCs, paints, carpeting, vehicle exhaust, formaldehyde, and carbon monoxide.

This air purifier also delivers 320 degrees of clean air out the top of the unit so fresh air can be more evenly distributed into a large room.

A remote control is include to adjust 6 fan speed settings and the programmable timer that allows specific scheduling for air cleaning at various times and days during the week.

When it comes to a good air purifier for large rooms that has the best and longest lasting filters available, this unit tops the charts.

See Amazon Reviews

4. Alen BreatheSmart (Customizeable Air Purifier for Large Spaces)

Covers 1,100 square feet

Looking for an air purifier for large spaces that can match any existing decor?

How about a unit that lets you customize the main True HEPA filter to meet your exact needs?

If that sounds good, then this air purifier model could be right for you.

With the ability to choose from 14 different panel colors and designs, this air purifier will blend in well in any room.

Some of the top color choices you have include white, brown, blue, pink, graphite, brushed bronze, brushed stainless, natural maple, black, champagne, rosewood, and more.

As for the customized internal True HEPA filter, you can choose between:

  • HEPA-Pure – This filter is good for anyone with allergies since it targets microscopic allergens.
  • HEPA-Silver – This filter offers an extra layer of protection to kill off bacteria that gets filtered from the air.
  • HEPA-FreshPlus – This filter has added features to get rid of smoke and other heavy chemical vapors.
  • HEPA-OdorCell – This filter is best for anyone looking to reduce strong odors caused by babies and pets.

Also included on this air purifier is an Ionizer feature to further reduce the number of pollutants in your home to keep your air smelling fresh and clean.

And finally, this unit has an Air Quality indicator light that shows you in real-time how good or bad the air quality is in the room (Blue = Excellent, Orange = Fair, Red = Poor).

See Amazon Reviews

5. Rabbit Air MinusA2 (Wall-Mountable Air Purifier for Large Rooms)

Covers 700 to 810 square feet

If you have a large room that’s on the smaller size of the big room scale, this air purifier is an excellent choice.

In fact, it’s our favorite and most recommended air purifier for a number of reasons:

  • It includes an unmatched 6-stage air filtration system.
  • It can be mounted to a wall or placed it on the floor.
  • You can customize the front panel with two colors (white or black) and numerous artistic designs, making it blend in like a piece of artwork.
  • It comes in two room sizes: 700 square feet and 810 square feet.
  • It comes in two versions: a standard model with a remote control and a smart air purifer Wi-Fi model.

As for the air filtration system, it strips pretty much every harmful particle out of your indoor air.

And it accomplishes this with these six powerful filters:

  • Pre-filter – This traps the largest particles in the air and helps extend the life of the other filters.
  • Medium filter – This filter is in place to trap larger dust and debris that passes through the pre-filter.
  • BioGS HEPA filter – This is a specially designed True HEPA filter that can last up to 3 years and collects 99.97% of pollutants down to 0.3 microns in size
  • Activated Carbon filter – This filter reduces toxic VOCs and common odors.
  • Customized filter – You can adjust this filter to best suits your air purification needs, choosing from Odor Elimination, Enhanced Germ Defense, Pet Allergens, or Toxin Absorption.
  • Ionizer – This features adds extra air cleaning power to the unit to help the internal filters better collect particlces like dust, allergens, smoke, mold spores, bacteria, etc.

This air purifier works great if you suffer from asthma, allergies, or any other respiratory issues.

It’s also one of the most powerful air purifiers for large spaces to remove tobacco smoke and odor.

While this unit may cover a smaller space than the other air purifiers on the list, it does have unmatched air cleaning performance for those who need it.

See Amazon Reviews

Common Questions About Large Room Air Purifiers

Can an Air Purifier Be Too Big for a Room?

An air purifier can’t necessarily be too big for a room because the larger the air purifier is, the faster it will clean the air in the room.

Technically, it can’t be too big, but you may not need something that powerful for a smaller room.

Larger air purifiers tend to be more expensive, so you could spend less money upfront by getting a smaller air purifier for a smaller room that matches the square footage size.

However, there’s nothing wrong with getting a larger air purifier if you want maximum power and efficiency when it comes to cleaning the air in your home.

Can I Use a Small Air Purifier in a Large Room?

You can use a small air purifier in a large room, but it may not be as effective as you had hoped.

Every air purifier is built to deal with a maximum amount of space.

When you place a small air purifier in a large room, it will take a long time for it to fully clean the air.

Most air purifiers can exchange the entire volume of air within a room 4 to 6 times per hour.

If you place an air purifier that’s rated for a 300 square feet room in a 700 square feet room, the exchange rate will be cut in more than half.

The larger the room and the smaller the air purifier, the fewer air changes will occur per hour.

When it comes to effectively and efficiently cleaning the air in a large room, getting an air purifier that’s rated to cover the square footage is in your best interest.

The air filters have the capability to filter out any impurities from large volumes of air, making sure you get the cleanest air possible.

Do Home Air Purifiers Really Work?

Yes, air purifiers really work.

If you get one with the right filters and the ability to handle the square footage of your space, it can do a really good job of trapping a high percentage of the airborne particles floating through your home.

Not only will this make the air cleaner and fresher, but it can also reduce symptoms associated with allergies and asthma.

This is a great way to keep you and your family healthy.

Where Should I Place My Air Purifier?

To ensure your air purifier is working the way it’s supposed to, you’ll want to put it someplace where the air can circulate in, around, and out of the unity freely.

There should be at least 24 inches between the air purifier and any potential obstacle, including furniture, walls, and curtains.

It’s recommended that you keep it away from corners, but you also want to put it in a place where it can’t get knocked over.

It may take a little effort to find the ideal spot in your home, but once the air purifier is in place, you’ll be happy and amazed by how fresh and clean your air will be.

Should I Leave the Air Purifier On All Day and Night?

Yes. To ensure that your air purifier is cleaning the air properly, it’s best to leave it running all day and night.

The more often the indoor air is cycled through the air purifier’s filters, the cleaner it becomes.

Turning off the unit for any length of time allows the pollutants and odor levels to rise.

Thus, it’s a good idea to keep your air purifier running all day and night, every day of the week.

What is the Best Large Room Air Purifier?

The best large room air purifier comes in five different models. All of which are reviewed on this page:

  • AIRMEGA 4002 Air Purifier
  • Medify MA-112 Air Purifier
  • IQAir HealthPro Plus Air Purifier
  • Alen BreatheSmart Classic Air Purifier
  • Rabbit Air MinusA2 Air Purifier

What Size Air Purifier for Large Spaces Do You Need?

best air purifier for large spacesWhen it comes to a large space, the common starting point is any room that’s at least 450 to 500 square feet in size.

The vast majority of rooms in typical homes are smaller than this (i.e. bedrooms, bathrooms, kitchens, dining rooms, etc.).

When looking for the best large room air purifier, you’ll want one that’s rated to cover at least 500 square feet or more.

Air purifiers for large spaces can either be used in one large room or several connected rooms.

Here’s how to measure the intended space to get the total square footage needed in an air purifier for your needs:

Measuring for One Large Room

Measuring one large room is simple, but it will require having a tape measure.

You’ll want to measure both the length and width of the room in feet, and then you’ll multiply those two numbers together.

For example, if your room is 30 feet by 30 feet, then the square footage of the entire room would be 900 square feet.

30 x 30 = 900 square feet.

If during your measurements you realize that one of those numbers is an odd number, such as 20 feet, 5 inches, then you can round the number up to 21 feet.

Using whole numbers will make it easier to figure out the square footage of the room and it won’t have that much of an impact on the air purifier you’ll need to buy.

Measuring for a Large Space with Connected Rooms

If you’re looking to add an air purifier to a large space with connected rooms, such as to an area that includes a kitchen, dining room, and living room, you’ll need to take the measurements of each room and then add them together.

Here’s an example:

  • 20 x 20 = 400 square feet (kitchen)
  • 10 x 10 = 100 square feet (dining room)
  • 30 x 20 = 600 square feet (living room)
  • Total = 1,100 square feet

Once you have this number, you’ll be able to find an air purifier that’s rated to handle the combined total square feet.

Finding the best air purifier and placing it in the right area will ensure that the air in all of these rooms is cleaned optimally, reducing odors and harmful airborne particles.

How Does an Air Purifier Help in a Large Room?

There are a variety of different items in your home that contribute pollutants to your indoor air.

Some of the most common pollutants you should be concerned about include:

  • Particulate matter
  • Dust
  • Tobacco smoke
  • Pet dander
  • Allergens
  • Mold
  • Pesticides
  • VOCs

Some of these items originate inside your home or office, but they can come from outside sources as well.

The most common sources of the harmful particles indoors include the following:

  • Cleaning supplies
  • Paints
  • Chemicals used to kill insects and other pests
  • Pets
  • High humidity (contributes to excessive dust and mold growth)
  • Dust
  • Buidling materials, carpeting, and furniture (responsible for off-gassing VOCs)

When it comes to outdoor pollution, this can get into your home through open windows, the ventilation system, or cracks in the structure.

Some of the most common pollutants that get into your home from outside include:

  • Dust
  • Pollen
  • Mold spores
  • Automobile exhaust
  • Factory smoke

When you and your family go outside and come back in, you may also be tracking in dirt and other debris on your shoes and clothing, all of which can have a negative impact on the quality of your indoor air.

If you’re looking for the best way to reduce these contaminants and odors, adding an air purifier can be incredibly beneficial.

Again, the filters in these units were developed to remove many different particles from the air.

Getting an air purifier with a True HEPA filter or several stages of air filtration ensures that your air will be as clean as it can get.

You don’t necessarily have to suffer from health issues, including allergies or asthma, to add an air purifier to your home.

Although they can help with these problems, people who enjoy clean, fresh air can benefit from adding an air purifier.

They are also amazing in homes with pets and for people who smoke, as they’ll reduce noxious odors and remove other particles.


After reading this entire review, we hope that you now have the information you need to make an informed decision and find the best large room air purifier for your home or office space.

You should have learned that air purifiers come with a variety of features and are rated to handle a wide range of room sizes.

To find the air purifier that’s right for you, you need to figure out exactly how large your room or space is and what contaminants you want the air purifier to reduce.

Once you know that, you’ll be able to find the best air purifier for large spaces that will improve the air indoors.

We hope you’re happy with your purchase and notice a difference in the quality of the air that circulates throughout your large space.