Best Whole House Air Purifiers of 2022

These purifiers care for your entire home — and easily too.

Keeping your house clean of all the visible dirt and dust is essential, not only for your eyes but also for your comfort. But, what about that which you can’t see?

In your home, there are countless particles floating around in the air that you breathe. Pet dander can worsen allergies and asthma, whereas cigarette smoke causes cancer. Even if you’ve never picked up a cigarette, inhaling secondhand smoke can have adverse effects.

It’s obvious then that keeping the atmosphere inside your home clean is important. One effective way of keeping the indoor air clean is by using an air purifier. These come in all sizes, so today, we’re focusing on the best whole house air purifiers.

Our Top Picks

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Product Comparison Table

Product Image of the Alen BreatheSmart Classic Large Room Air Purifier, Medical Grade Filtration H13 True HEPA for 1100 Sqft, 99.99% Airborne Particle Removal, Captures Allergens & Dust, in White
Best Overall
Alen BreatheSmart Air Purifier
  • Unique HEPA filter
  • Full coverage
  • Ultra-quiet
Product Image of the Coway Airmega 400 Smart Air Purifier (Covers 1,560 sq. ft.), True HEPA Air Purifier with Smart Technology
Best Smart Pick
Coway Airmega 400 Air Purifier
  • Smart technology & air monitoring
  • Powerful suction
  • Filter indicator
Product Image of the Medify MA-112 Air Purifier with H13 True HEPA Filter | 2,500 sq ft Coverage | for Allergens, Smoke, Smokers, Dust, Odors, Pollen, Pet Dander | Quiet 99.9% Removal to 0.1 Microns | White, 1-Pack
Best for Large Homes
Medify AirMA-112
  • Powerful cleaning
  • Automatic quality updates
  • Medical-grade filtration
Product Image of the IQAir GC MultiGas – Medical-Grade Air Purifier for Chemicals, Gases, & Odors with MultiGas & H11 HyperHEPA Pre-Filter – Odors, Smoke, Allergens, Pets, Asthma Triggers, Pollen, Dust, MCS; Swiss Made, White
Best Filter
IQAir Medical-Grade HEPA Filter
  • Super filter
  • Minimal air leakage
  • Powerful fan and remote control
Product Image of the Greentech Environmental pureAir 3000 - Portable Air Purifier and Air Cleaner, Air Purifiers for Home, Office, and Bedroom, For Spaces Up to 3000 Square Feet, Neutralizes Tough Odors, Easy Set Up
Best for Mold & Mildew
PureAir 3000 Air Purifier
  • Removes mold and harmful pollutants
  • Easy to use
  • Refreshens the air

Benefits of Whole House Air Purifiers

1. Better Productivity

If you’re spending a lot of time at home — perhaps you work from home or you’re a stay-at-home parent — clean air can help. By improving the air you breathe, you can increase your productivity (1).

As the levels of airborne pollutants become too high indoors, you can quickly become fatigued and lethargic. You may notice that you feel sleepy most of the time, or you might experience frequent headaches. These could all be signs that the indoor air is poor.

2. Improved Health

If you suffer from either allergies or asthma, then an air purifier can have significant effects on your well-being. Indoor pollutants such as dust, dander, hair, among others, are likely to be the culprits of your symptoms (2).

Because most air purifiers can effectively remove particles as small as 0.3 microns, they can better your symptoms. If the machine contains the right filter, even better; it can collect 99.97 percent of the particles.

3. Superior Sleep

Poor indoor air quality can interfere with your sleep (3). Dust and other particles can cause snoring and reduce the efficiency of your rest. With infants, polluted air could, in severe cases, result in sudden infant death syndrome (SIDS) (4).

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Therefore, by improving the quality of the indoor air, you can minimize any chances of developing sleep disorders. In all, you’ll get a restful night.

How to Choose the Best Whole House Air Purifiers

If you’re looking for a product that will keep the air in your entire home clean, here are the features to look for.

Coverage Area

Whole house air purifiers can cover a great distance. You can get ones that connect to your HVAC system. However, today, we focused on portable units, capable of covering a whole house.

For each air purifier, we will state their coverage capacity. Work out how big your home is and buy accordingly. You’ll find that our picks range from 1100 to 3700 square feet.

Keep In Mind

For best results, choose one that can cover a few extra square feet more than your home. This will ensure you’ve got full coverage.

Noise Level

Having a noisy appliance is an annoyance, especially one that runs around the clock. But not all air purifiers are quiet, and the bigger models tend to produce more noise as well.

Almost all air purifiers will tell you their noise levels from the lowest to the highest setting. If it doesn’t say in the description, scroll down to the reviews and other users will surely tell you how loud it is.

To combat a noise issue, it’s a good idea to buy a larger unit.

It may sound like counterintuitive advice, but often, you can operate larger units on a lower and quieter setting. In comparison, smaller machines must work at a higher speed in large homes. Unfortunately, this usually means more noise.


The filter is what makes the air purifier successful. If the filter is of poor quality or just doesn’t have enough filtration stages, the air won’t get purified. The best filters to look for are HEPA and activated carbon.

HEPA filters remove the tiny pollutants from the air. Pollutants that HEPA filters can eliminate are dust, dust mites, pollen and mold.

For odors, though, you’ll need an activated carbon filter. Among smells, these can collect chemicals, gas molecules, formaldehyde and more.

Fortunately, most whole house air purifiers utilize both. The downside, however, is that they’ll require replacement eventually, which can be pricey.

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Warranties allow you to replace broken parts or even the whole unit, should something go wrong. When manufacturers back their products with a warranty, it means that they stand by the quality. So, having a good one generally means that the product is worth its price.

Best Whole House Air Purifier Reviews of 2022

With our criteria above in hand, we looked at reviews, expert opinions and leading sites to find the top models out there. Then we narrowed the choices down to the five best whole house air purifiers.

1. Alen BreatheSmart Classic Air Purifier

Best Overall Whole House Air Purifier

The BreatheSmart Classic air purifier from Alen is one of the best-reviewed products we found. It has received outstanding praise from homeowners suffering from allergies, stating that it helped ease the symptoms. So it’s well worth our top spot.

With a modern design and multiple color options, it suits any home and decor. But despite the beautiful unit, it’s quite subtle. It also features patented technology to ensure whisper-quiet operation.

This bad boy boasts several HEPA filter layers. Unsurprisingly, it works successfully at removing irritants, odors and dust from the atmosphere and surfaces. Then while you sleep, it emits a soothing noise for a restful night.

Photo of the Alen BreatheSmart Classic Air Purifier

The Pros

Unique HEPA Filter

The BreatheSmart air purifier works specifically to ease symptoms of allergies. To do this, it features a unique HEPA PURE filter.

The filter consists of several HEPA layers. Each layer catches particles such as pollen, pet dander and hair, dust and dust mites. Next, the unit sieves the air through the pre-filter, capturing hair and larger particles. And then, the next layers trap airborne irritants.

Full Coverage

The machine is very powerful and capable of covering up to 1100 square feet. It’s excellent for large family rooms or open-concept spaces. The BreatheSmart unit will get to work every 30 minutes to keep your house fresh and clean.


Whether you use it during the night or you’re sensitive to sounds, the BreatheSmart will not disappoint you. It features Alen’s WhisperMax technology, ensuring a quiet operation. The sound level ranges between 41.5 and 56 decibels, depending on which fan speed you’re using.

What’s more, while on turbo-speed, the unit emits a “pink noise” — a lower tone than white noise. It resembles heavy rainfall and is quite soothing.

Beautiful Design

You can choose between several front panel designs, suitable for various home decors. These include brushed bronze, brushed stainless, graphite, gold champagne, and oak. You’ll also find maple, rosewood, weathered gray and white designs.

The Cons

It Emits a Chemical Odor

Some users mentioned that during the first few uses, the machine would emit a chemical odor. Fortunately, after a few hours of running, it seemed to disappear.

Additional Specs

Unit measurements 26.75 inches by 17.75 inches by 10 inches
Stages of filtration Multiple
Power consumption 105 watts
Room coverage 1100 square feet
Warranty Lifetime warranty

2. Coway Airmega 400 Smart Air Purifier

Best Smart Whole House Air Purifier

The Airmega 400 from Coway is an excellent addition to the modern home. With integrated smart technology, the unit can automatically adjust to its surrounding environment. Reviewers praise how well it works at capturing pollutants from the air.

Featuring two filters, it can separate up to 99.97 percent of particles from the air, leaving your home refreshed. You can keep track of its progress through the sleek LED ring indicator, displaying the quality of the air. By doing two air-sweeps per hour, the machine can clean your home in no time.

With a modern design and powerful suction, it’s well worth a second look.

Photo of the Coway Airmega 400 Smart Air Purifier

The Pros

Smart Technology and Air Monitoring

Included with the Coway Airmega is its Smart Mode feature. This enables the unit to adapt its speed based on the surrounding environment automatically. Another benefit is energy efficiency — if high speed isn’t necessary, it will save you on your energy bill.

The unit is suited with pollution sensors, which communicate the indoor air quality to the Smart Mode. On the machine, you’ll see a vibrant LED ring that will let you know the state of the indoor air every minute. It changes color from blue to red.

Powerful Suction

With a double-sided suction, the Coway Airmega is quite powerful. It draws in air from two sides, pushing it through the filters and out through the top. Before leaving the unit, the air goes through two filters — a pre-filter and a HEPA and activated carbon layer.

The pre-filter is easy to clean and doesn’t require replacement — it works to capture fur and dust. The next layer is the Max2 filter, which is a combination of activated carbon and True HEPA filters. This combo will work to swatch all the microscopic particles.

Filter Indicator

Once the filter requires a replacement, the Filter Indicator will tell you. The indicator lights up clearly and well in advance for you to change the layers. It can also notify you when it’s time to clean the pre-filter.

Great Design

The design of the Coway Airmega is truly eye-catching. It’s modern with subtle details and is available in white or black.

The Cons

Expensive Filters

A few users noted that although the unit is great, the Max2 filters are quite expensive to replace.

Additional Specs

Unit measurements 14.8 inches by 14.8 inches by 22.8 inches
Stages of filtration Two
Power consumption 66 watts
Room coverage 1560 square feet
Warranty Five-year warranty

3. Medify AirMA-112

Best Whole House Air Purifier for Large Homes

With a modern design and powerful suction, the Medify Air MA-112 is fantastic. It has received stellar reviews from users, praising power and silence.

The unit is one of the most powerful air purifiers on our list today. It can cover a 3700 square-foot home in one hour. It draws in air from two sides, while distributing it in a 360-degree radius.

Suited with a True HEPA filter, the machine is medical-grade, efficient at removing even the tiniest particles. It features a digital display, giving you an idea of the indoor air quality both in colors and numbers.

Photo of the Medify AirMA-112

The Pros

Powerful Cleaning

The Medify air purifier is incredibly powerful. It can clean a 3700 square-foot area in an hour and a 2500 square-foot room in 30 minutes. Its effectiveness is mainly due to the high CADR rating of its filter, which is at 950.

It draws in the polluted air and then distributes the clean air in multiple directions. With four fan speeds, you can easily choose one to suit your needs.

Automatic Quality Updates

Included in this unit is an air quality indicator, which changes color to display improvements. In addition to colors, the machine tells you the Particle Matter (PM) of the air, indicated by a digital number readout. A low number means less particle pollution present.

Then the fan adjusts automatically for when higher or lower speeds are necessary. You can also regulate it yourself if you prefer, by selecting a fan speed.

Medical-Grade Filtration

By using four levels of filtration, the Medify Air has a medical-grade performance. It removes everything from pet dander, allergens to larger fibers. The machine includes a True HEPA filter, which effectively removes 99.97 percent of particles as small as 0.3 microns.

Then there’s the activated carbon filter, which contains carbon pellets, working to remove odors and formaldehyde. As an optional filter, you can choose to add an Anion generator that produces negative ions, refreshing the outgoing air.

Hidden Wheels and Child Lock

To prevent small fingers from meddling with the settings, the unit allows you to lock it. Then underneath are hidden wheels only grown-ups can find and operate, making it easier to move.

The Cons

Large Unit

A few users said that the unit is very large and doesn’t blend in well with the surroundings.

Additional Specs

Unit measurements 13 inches by 15 inches by 28 inches
Stages of filtration Four
Power consumption N/A
Room coverage 3700 square feet
Warranty Lifetime warranty

4. IQAir Medical-Grade Air HEPA Filter

Best Filter Whole House Air Purifier

If you’re suffering from allergies or asthma, then the IQAir will surely suffice. It features one of the finest HEPA filters, enabling the unit to collect ultra-fine particles, known for causing symptoms.

This efficient machine is suited with a strong fan and maintenance-free motor, distributing the filtered air in several directions. It works to eliminate drafts as well as escaping unfiltered air.

You can control all the settings via the included remote. The machine will notify you of any changes.

Photo of the IQAir Medical-Grade Air HEPA Filter

The Pros

Super Filter

The IQAir includes a super-fine filter, dubbed as HyperHEPA filtration technology. It’s an exclusive version of HEPA, designed to collect particles as small as 0.003 microns. Through independent testing, IQAir found that it successfully stopped 99.5 percent of ultra-fine particles known for causing viruses.

Minimal Air Leakage

To prevent unfiltered air from escaping, the IQAir includes a triple-sealing technology. It ensures that almost all the air entering the unit gets filtered before exiting. The system consists of a 3D UltraSeal, which are individual seals providing an airtight closure.

Powerful Fan

Included with the IQAir is a New Edition fan as well as a maintenance-free motor. This combo can deliver air up to 780 cubic feet per minute. It’s also energy efficient — depending on which setting you use, it draws between 27 to 215 watts.

Then the EvenFlow diffuser delivers air in a 320-degree radius. It’s ultra-quiet and won’t create a draft.

Remote Control

You can control the unit using the included remote. With that, you can monitor the filter, program the settings and much more.

The Cons

Creates Bad Smells

Some reviewers noted that when you first use the unit, it emits a bad odor. However, a few also said that the company was quick to respond and sent out a new filter to prevent the smell.

Additional Specs

Unit measurements 16 inches by 15 inches by 28 inches
Stages of filtration Multiple
Power consumption 215 watts
Room coverage 1125 square feet
Warranty One year warranty, 10 years if you register

5. PureAir 3000 - Whole Home Air Purifier

Best Whole House Air Purifier for Mold and Mildew

If your home is prone to mold, mildew and other harmful pathogens, the PureAir 3000 is fantastic. Users praise the way it helped refresh their homes.

The PureAir 3000 utilizes a special method for successfully removing all harmful particles. It’s very powerful and easy to use. Included is a user’s manual as well as a remote to control it.

However, it does use ionization so if you have asthma, use it with caution.

Photo of the PureAir 3000 - Whole Home Air Purifier

The Pros

Removes Mold and Other Harmful Pollutants

This device utilizes something called photocatalytic oxidation. The process works effectively at breaking down odors as well as mold, bacteria and other harmful pollutants present in the air. PureAir claims that it can successfully reduce such dangerous pathogens by 99 percent in just 24 hours.

Easy to Use

The unit is very easy to set up and use. It includes thorough instructions both for set up, use as well as maintenance.

Refreshens the Air

While removing almost all the pollutants from indoor air, the PureAir 3000 will also refresh it. By utilizing a method resembling that of nature, it leaves the atmosphere crisp and fresh.

The Cons

Emits Odor

A few users complained that the unit emits an odor. Thankfully, it seems to disappear after a few uses.

Additional Specs

Unit measurements 12 inches by 9 inches by 12.25 inches
Stages of filtration Multiple
Power consumption N/A
Room coverage 3000 square feet
Warranty One year warranty

Whole House Air Purifier Comparison Chart

Product Best Unit measurements Stages of filtration Power consumption Room coverage Warranty
Alen BreatheSmart Air Purifier Overall 26.75″ x 17.75″ x 10″ Multiple 105 W 1100 sq ft Lifetime
Coway Airmega 400 Air Purifier Smart Air Purifier 14.8″ x 14.8″ x 22.8″ Two 66 W 1560 sq ft 5-year
Medify AirMA-112 Large Homes 13″ x 15″ x 28″ Four N/A 3700 sq ft Lifetime
IQAir Medical-Grade HEPA Filter Filter 16″ x 15″ x 28″ Multiple 215 W 1125 sq ft 1 year
PureAir 3000 Air Purifier Mold & Mildew 12″ x 9″ x 12.25″ Multiple N/A 3000 sq ft 1 year

Cleaner Air for a Happier Home

Having the best whole house air purifier will benefit you in many ways, mainly if you suffer from allergies or asthma. They work to clean the atmosphere on a large scale — some as much as 3700 square feet.

While looking for the best whole house air purifier, make sure it can cover your entire home. Then verify that it won’t be too loud and includes the right filters. Warranties are a great factor to include as well, although they aren’t necessary.

Headshot of Matthew Sullivan

About the Author

Matthew Sullivan

Matthew is a freelance writer with several years of experience in DIY and HVAC. For as long as he can remember, Matthew has always found great pleasure in taking things apart and learning how to put them back together.