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Plus, it has a wireless charging dock.

Coway Airmega 400S App-Enabled Smart Technology Air Purifier

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(We were surprised by how often we used this feature.)

you’re free to connect your Amazon Alexa or Google Home Assistant to control it via voice commands.

The IoCare app offers a convenient way to remotely monitor your home’s air quality levels, as well.

Person pushing a button on the Levoit Core 400S Smart True HEPA Air Purifier

PHOTO: The Spruce / Henry Wortock

We experienced some initial frustrations trying to connect this air purifier to our home Wi-Fi.

Jeffrey Siegel, a professor of civil engineering at the University of Toronto.

The Levoit Core 400S is also convenient to operate.

Hand taking an air quality reading near the Levoit Core 400S Smart True HEPA Air Purifier

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All of the functionality is in a refined, tower-like, metal design.

Notably, the Dyson PH04 houses a permanent catalytic filter that eliminates formaldehyde.

The app lets you view filter reminders, historical air quality data, and set cleaning schedules, too.

Dyson Purifier Humidify+Cool Formaldehyde PH04 displayed next to a sofa and side table

PHOTO: The Spruce / Dera Burreson

It offers a convenient app along with Google Assistant and Amazon Alexa voice connectivity for remote control and monitoring.

We found that it performs superbly at its lowest setting, filtering pet hair and smoke.

Just like the MinusA2, you could expect a sleek design and efficient operation from the A3.

Person assembling the Dyson Purifier Humidify+Cool Formaldehyde PH04

PHOTO: The Spruce

But it’s even quieter, and registers under 50 decibels for its first three levels.

Filters can be restocked as a one-time purchase or subscription, making maintenance really easy.

We especially love how unobtrusive this air purifier is.

Hand pushing a button on the remote in front of the Dyson Purifier Humidify+Cool Formaldehyde PH04

It can even be mounted to a wall for the ultimate, built-in, home-maintenance gear.

The Blueair Blue Pure 411i Max impressed us with its quiet operation and compact design.

While the model is pretty straightforward, we recommend downloading the corresponding smartphone app.

Person filling the reservoir of the Dyson Purifier Humidify+Cool Formaldehyde PH04 with water

The app also allows you to monitor air quality and remotely control all of the air purifier’s features.

We then light incense, and spread a mixture of sawdust, dirt, and flour.

We also spray a room spray.

Person assembling the Dyson Purifier Humidify+Cool Formaldehyde PH04

If the air purifier has a sleep mode, we also see how noisy that is.

In general, smart air purifiers are much more expensive than regular, non-smart air purifiers.

More on Our Testing Process:Our process has evolved.

Person filling the reservoir of the Dyson Purifier Humidify+Cool Formaldehyde PH04 with water

In general, air purifiers can cover spaces anywhere from 80 square feet to 1,600 square feet.

While larger machines tend to deliver more coverage area, form doesnt indicate how much coverage an appliance offers.

Generally speaking, the higher an air purifiers CADR, the faster it will work to clean the air.

Person squatting next to Coway Airmega 400S Smart Air Purifier

PHOTO: The Spruce / Henry Wortock

And smart air purifiers dont necessarily have a higher CADR than regular air purifiers.

This is particularly the case because brands can market their products a bit confusingly.

The best interval for your home could be different, depending on your preferences and the air quality conditions.

Person lifting the lid of Coway Airmega 400S Smart Air Purifier

PHOTO: The Spruce

Some brands also offer custom filters that can be bought to target a specific concern.

Many brands also offer filter subscription services within the app or online for convenient maintenance.

For example, models that offer voice assistant support will require app integration.

Person pressing button of Coway Airmega 400S Smart Air Purifier

Amazon Alexa and Google Assistant are the most common voice assistants you might work with.

Why Trust The Spruce?

She currently uses theClorox Tabletop Air Purifiera tiny model that doesn’t disrupt her sleepin her bedroom.

Person lifting the lid of Coway Airmega 400S Smart Air Purifier

Our Experts:

How to Choose a Room Air Cleaner.Energy Star.

What Is A HEPA Filter?United States Environmental Protection Agency.

Person pressing button of Coway Airmega 400S Smart Air Purifier

A person measure the air quality around the Rabbit Air A3 Ultra Quiet HEPA Air Purifier

PHOTO: The Spruce / Dera Burreson

A person pulls the Rabbit Air A3 Ultra Quiet HEPA Air Purifier’s filter out

PHOTO: The Spruce

A person pours powder on the ground

A person pulls the Rabbit Air A3 Ultra Quiet HEPA Air Purifier’s filter out

A person pours powder on the ground

Blueair Blue Pure 411i Max Air Purifier displayed on wood table

PHOTO: The Spruce / Henry Wortock

Person setting up the Blueair Blue Pure 411i Max Air Purifier

PHOTO: The Spruce / Henry Wortock

Person assembling the Blueair Blue Pure 411i Max Air Purifier

Person sliding off the filter cover of Blueair Blue Pure 411i Max Air Purifier

Hand holding blue sound testing device

Person setting up the Blueair Blue Pure 411i Max Air Purifier

Person assembling the Blueair Blue Pure 411i Max Air Purifier

Person sliding off the filter cover of Blueair Blue Pure 411i Max Air Purifier

Hand holding blue sound testing device

A person removes the filter on the AirThings Renew Smart Air Purifier

PHOTO: The Spruce / Henry Wortock

A person lifts up the AirThings Renew Smart Air Purifier

PHOTO: The Spruce

A person lifts up the AirThings Renew Smart Air Purifier

A person removes the cord on the AirThings Renew Smart Air Purifier

A person places a filter into the AirThings Renew Smart Air Purifier

A person holds the AirThings Renew Smart Air Purifier by the top straps

A person presses a button on the AirThings Renew Smart Air Purifier

A person lifts up the AirThings Renew Smart Air Purifier

A person lifts up the AirThings Renew Smart Air Purifier

A person removes the cord on the AirThings Renew Smart Air Purifier

A person places a filter into the AirThings Renew Smart Air Purifier

A person holds the AirThings Renew Smart Air Purifier by the top straps

A person presses a button on the AirThings Renew Smart Air Purifier

A collection of air purifiers displayed next to a plant

Henry Wortock

Blueair Air Purifier

Henry Wortock

A person lifts up the AirThings Renew Smart Air Purifier

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Person sprinkling powder onto carpet

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Clipboard with notes, an air quality meter, and a stopwatch displayed on a table

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Person taking a decibel reading above the Toppin Comfy Air C2 Air Purifier

The Spruce / Henry Wortock

Blueair Blue Pure 411i Max Air Purifier controls

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Two hands removing foam from the Coway Airmega 160 Air Purifier

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Hand pressing a button on top of the Levoit Core 300S Smart True HEPA Air Purifier

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Hands removing the bottom of the Levoit Core 300S Smart True HEPA Air Purifier

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Person pressing button on the remote for the Rabbit Air MinusA2 Ultra Quiet HEPA Air Purifier SPA-780A

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The front panel on the LG PuriCare 360 Single Filter Air Purifier with Clean Booster

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