If you're looking to improve your home's air quality, you need an air purifier. The best ones can remove particulate matter (the main pollutant in wildfire smoke), bacteria, dust, industrial emissions, mold, odor, pet dander, pollen, viruses, and other harmful contaminants from the air. But not all air purifiers are equally effective, so we're here to help you find one that works and has the features you want. We've been reviewing smart air purifiers in our own homes for more than a decade. The Dyson Big & Quiet BP03 is our top pick due to its wide coverage range, long filter life, detailed air pollution data, and useful app and voice controls. However, our list below offers more excellent options for all room sizes and budgets.
Overview
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![Dyson Big+Quiet Formaldehyde BP03]()
Best OverallDyson Big+Quiet Formaldehyde BP03
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![Blueair Blue Signature]()
Best Air Purifying TableBlueair Blue Signature
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![Dyson Hot+Cool Formaldehyde HP09]()
Best for Space HeatingDyson Hot+Cool Formaldehyde HP09
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![Dyson Purifier Cool TP07]()
Best Oscillating FanDyson Purifier Cool TP07
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![Rabbit Air A3 Air Purifier]()
Best Customization OptionsRabbit Air A3 Air Purifier
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![Coway Airmega 250S Air Purifier]()
Best for Large RoomsCoway Airmega 250S Air Purifier
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![Smartmi Air Purifier P1]()
Best Portable Air PurifierSmartmi Air Purifier P1
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![Morento Smart Air Purifier HY4866-WF]()
Best for Budget ShoppersMorento Smart Air Purifier HY4866-WF
You Can Trust Our Reviews
Deeper Dive: Our Top Tested Picks
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![Dyson Big+Quiet Formaldehyde BP03]()
Best OverallDyson Big+Quiet Formaldehyde BP03
Pros & Cons
Why We Picked It
The Dyson Big+Quiet Formaldehyde BP03 uses a three-stage HEPA filtration system to remove harmful pollutants, including formaldehyde, nitrogen dioxide (NO2), carbon dioxide, and other volatile organic compounds (VOCs). It's one of the most efficient air purifiers we have tested, and its filters will last up to five years before needing replacement. We also appreciate its detailed air quality reports, which let you closely monitor indoor pollution levels.
Who It's For
Large rooms: If you need an air purifier that quickly and quietly purifies the air in large rooms, the Dyson Big+Quiet Formaldehyde BP03 is a top choice. It's meant for rooms up to 1,076 square feet, and it did an outstanding job of purifying the air in our testing.
Data analysts: The Big+Quiet lets you monitor real-time indoor pollution levels on its LCD panel and track them in its companion app. The app offers historical charts for general air quality, PM2.5, PM10, HCOC (Formaldehyde), VOC, NO2, temperature, and humidity readings.
Noise-sensitive individuals: When running at high speed, the Big+Quiet produced just 50dB. It's much quieter than many other purifiers we have tested.
Smart home enthusiasts: With support for Alexa, Google, and Siri voice commands, the Dyson BP03 is an excellent addition to any smart home. Alexa voice commands to turn the Big+Quiet on and off and change fan settings all worked well in testing.
Maintenance avoiders: Most air purifiers require yearly filter changes, but the Big+Quiet doesn't. Its HEPA filter is rated to last up to five years before needing replacement, and its carbon filter has a two-year lifespan.
Specs & Configurations
Cost of Replacement Filters $169.99 for HEPA, $89.99 for Activated Carbon Purification Method Activated Carbon Purification Method Composite Catalyst Purification Method HEPA Recommended Room Size 1,076 square feet Removes Formaldehyde Scheduling Support Voice Control Support Amazon Alexa Voice Control Support Google Assistant Voice Control Support Siri Learn More Dyson Big+Quiet Formaldehyde BP03 Review -
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Credit: John R. Delaney
![Blueair Blue Signature]()
Best Air Purifying TableBlueair Blue Signature
Pros & Cons
Why We Picked It
The Blueair Blue Signature utilizes multi-stage filtration to keep the air in your home clean and safe. It works seamlessly with the Alexa and Google smart home platforms, provides multiple air quality readings, and can even double as a side table. While its replacement filters are on the pricey side, it offered similar performance to air purifiers that cost hundreds more in our testing.
Who It's For
Large rooms: Designed for rooms up to 705 square feet, the Blue Signature did a superb job of clearing the air in our testing. Its 360-degree filters promise to capture 99.97% of airborne pollutants down to 0.1 microns, including VOCs from household cleaning products.
Interior designers: Because the top of the Blue Signature purifier is flat, it can be used as a tabletop to hold a plant or books, but if you really want this device to blend in as a furnishing, you can order a $79.99 wooden base with legs that adds another 4 inches to the overall height and makes the purifier look like a real end table. Other accessories include pre-filter coverings in various colors ($24.99 each) and a chrome base ring ($99.99).
Specs & Configurations
Cost of Replacement Filters $99.99 Purification Method HEPA Recommended Room Size 705 square feet Voice Control Support Amazon Alexa Voice Control Support Google Assistant Learn More Blueair Blue Signature Review -
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![Dyson Hot+Cool Formaldehyde HP09]()
Best for Space HeatingDyson Hot+Cool Formaldehyde HP09
Pros & Cons
Why We Picked It
Dyson makes some of our favorite air purifiers, and the Hot+Cool Formaldehyde HP09 is one of its most versatile models. It's not only a highly capable air purifier but also a fan and a space heater with 350 degrees of oscillation. In addition to the usual airborne pollutants, this model captures formaldehyde (HCHO), a colorless chemical emitted by cleaners, plywood, varnishes, and many other common household items and materials.
Who It's For
Temperate climates: If you need a space heater, this one blows fresh, purified air. Since it doubles as a fan, it's an excellent choice if you need both heating and cooling.
New and renovated homes: This is also a compelling option if you are undergoing a renovation, as common building materials like plywood and particleboard, as well as new furniture and rugs, can emit formaldehyde, a pollutant most air purifiers don't capture. The HP09's catalytic filter captures formaldehyde particles and converts them into carbon dioxide and water.
Specs & Configurations
Cost of Replacement Filters $79.99 Purification Method HEPA Removes Formaldehyde Scheduling Support Voice Control Support Amazon Alexa Voice Control Support Google Assistant Voice Control Support Siri Learn More Dyson Hot+Cool Formaldehyde HP09 Review -
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![Dyson Purifier Cool TP07]()
Best Oscillating FanDyson Purifier Cool TP07
Pros & Cons
Why We Picked It
The Dyson Purifier Cool TP07 is among our top picks for good reason. In addition to doing a great job of cleaning the air in our tests, it offers numerous air-quality measurements, voice control, and a fully sealed HEPA 13 enclosure. It even integrates a sleek oscillating fan that keeps you cool.
Who It’s For
Space savers: If you want a top-of-the-line, smart air purifier and fan combo, look no further than the Dyson Purifier Cool TP07. Its tower design makes it a top choice for staying cool, and it can oscillate up to 350 degrees to quickly distribute purified air throughout a room.
Specs & Configurations
Cost of Replacement Filters $79.99 Purification Method Activated Carbon Purification Method HEPA Recommended Room Size N/A Scheduling Support Voice Control Support Amazon Alexa Voice Control Support Google Assistant Voice Control Support Siri Shortcuts Learn More Dyson Purifier Cool TP07 Review -
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![Rabbit Air A3 Air Purifier]()
Best Customization OptionsRabbit Air A3 Air Purifier
Pros & Cons
Why We Picked It
The Rabbit Air A3 Air Purifier is pricey, but worth the money for its excellent purification performance and ample customization options. It uses six stages of filtration to eliminate harmful airborne pollutants and odors, including viruses, bacteria, volatile organic compounds (VOCs), and other dangerous germs and allergens. You can hang it on a wall or place it on the floor, and it offers several specialty filter options, mood lighting colors, and eye-catching prints for the front panel. Moreover, it can cover a very large area, with a recommended room size of up to 1,070 square feet.
Who It's For
Large spaces: Given its wide coverage area, the A3 is especially well-suited for large rooms and open-concept floor plans. It performed admirably in our tests and remained very quiet, even at high speed.
Art lovers: If you want an air purifier that isn't an eyesore and/or is wall-mountable, the A3 is our top pick. It offers a choice of specialty filters, mood lighting colors, and eye-catching prints for the front panel. The front features a magnetic filter/air intake cover that can be embellished with a variety of artwork prints, including Vincent van Gogh’s The Starry Night, Katsushika Hokusai’s The Great Wave, or Jan Davidsz. de Heem’s Vase of Flowers.
Specs & Configurations
Cost of Replacement Filters $115.95 Purification Method Activated Carbon Purification Method HEPA Purification Method Ionic Recommended Room Size 1,070 square feet Removes Formaldehyde Scheduling Support Voice Control Support Amazon Alexa Learn More Rabbit Air A3 Air Purifier Review -
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![Coway Airmega 250S Air Purifier]()
Best for Large RoomsCoway Airmega 250S Air Purifier
Pros & Cons
Why We Picked It
Featuring a HEPA carbon-activated filter, the Coway Airmega 250S impressed us with its ability to quickly remove pollutants from the air during our cleaning tests. We like the support for Alexa and Google Assistant voice controls, as well as the thoughtful companion app that presents the current PM10 and PM2.5 levels alongside colorful charts of daily, weekly, and monthly air quality measurements.
Who It’s For
Large spaces: The Airmega 250S is designed to remove dust, pollen, smoke, and other allergens from rooms up to 930 square feet. It's not the most stylish air purifier we've tested, but it effectively covers more space than similarly priced models and is quite easy to move between rooms. If you have a large home, this is a top option.
Specs & Configurations
Cost of Replacement Filters $79 each for MAX2 filters Purification Method HEPA Recommended Room Size 930 square feet Scheduling Support Voice Control Support Amazon Alexa and Google Assistant Learn More Coway Airmega 250S Air Purifier Review -
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![Smartmi Air Purifier P1]()
Best Portable Air PurifierSmartmi Air Purifier P1
Pros & Cons
Why We Picked It
Although the Smartmi P1 is the smallest air purifier we’ve tested, it handled our air cleansing tests with aplomb. It doesn’t provide nearly as many air quality measurements as more expensive models, but you still get support for Alexa, Google Assistant, and HomeKit.
Who It’s For
Small spaces: The Smartmi P1 is ideal for apartments, dorm rooms, and any other small spaces that require air filtration. It's also quite portable, measuring just 14 inches tall and weighing just over 6 pounds.
Budget shoppers: If you want cleaner air on a tight budget, this is a top pick. It's the most affordable model on this list, and replacements for its three-layer HEPA filters won't break the bank at just $39.99 apiece.
Specs & Configurations
Cost of Replacement Filters $39.99 Purification Method HEPA Recommended Room Size 320 square feet Scheduling Support Voice Control Support Amazon Alexa Voice Control Support Google Assistant Voice Control Support Siri Shortcuts Learn More Smartmi Air Purifier P1 Review -
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![Morento Smart Air Purifier HY4866-WF]()
Best for Budget ShoppersMorento Smart Air Purifier HY4866-WF
Pros & Cons
Why We Picked It
The Morento HY4866-WF uses a unique dual-filter design that draws air in from the front and back of the unit, making it effective for rooms up to 1,076 square feet. Measuring 17.5 by 13.1 by 7.6 inches (HWD) and weighing 7.9 pounds, it's fairly compact and lightweight, especially for an air purifier with such a large coverage area. Its multi-layer HEPA filters are designed to remove odors and up to 99.97% of airborne pollutants, including dust, smoke, pet dander, and formaldehyde. It supports Amazon Alexa and Google Assistant voice controls and performed well in our air cleaning tests.
Who It's For
Budget shoppers: If you're looking for the lowest-priced smart air purifier with the largest coverage area, the Morento HY4866-WF fits the bill. Its dual HEPA and carbon filters did a good job of purifying the air in our tests, and it had no trouble responding to voice commands and running Alexa routines. It only tracks PM2.5 levels, whereas some high-end models offer additional air quality insights, and it can get loud at high speeds, but neither is a deal-breaker given its reasonable price.
Specs & Configurations
Cost of Replacement Filters Starting at $36.99 Purification Method HEPA Recommended Room Size 1,076 square feet Removes Formaldehyde Scheduling Support Voice Control Support Amazon Alexa Voice Control Support Google Assistant Learn More Morento Smart Air Purifier HY4866-WF Review -
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Best For | Best Overall | Best Air Purifying Table | Best for Space Heating | Best Oscillating Fan | Best Customization Options | Best for Large Rooms | Best Portable Air Purifier | Best for Budget Shoppers | Best Overall | Best Air Purifying Table | Best for Space Heating |
Recommended Room Size | 1,076 square feet | 705 square feet | N/A | 1,070 square feet | 930 square feet | 320 square feet | 1,076 square feet | 1,076 square feet | 705 square feet | ||
Purification Method | HEPA, Activated Carbon, Composite Catalyst | HEPA | HEPA | HEPA, Activated Carbon | HEPA, Activated Carbon, Ionic | HEPA | HEPA | HEPA | HEPA, Activated Carbon, Composite Catalyst | HEPA | HEPA |
Removes Formaldehyde | |||||||||||
Cost of Replacement Filters | $169.99 for HEPA, $89.99 for Activated Carbon | $99.99 | $79.99 | $79.99 | $115.95 | $79 each for MAX2 filters | $39.99 | Starting at $36.99 | $169.99 for HEPA, $89.99 for Activated Carbon | $99.99 | $79.99 |
Scheduling Support | |||||||||||
Voice Control Support | Amazon Alexa, Google Assistant, Siri | Amazon Alexa, Google Assistant | Amazon Alexa, Google Assistant, Siri | Amazon Alexa, Google Assistant, Siri Shortcuts | Amazon Alexa | Amazon Alexa and Google Assistant | Amazon Alexa, Google Assistant, Siri Shortcuts | Amazon Alexa, Google Assistant | Amazon Alexa, Google Assistant, Siri | Amazon Alexa, Google Assistant | Amazon Alexa, Google Assistant, Siri |
Buying Guide: The Best Air Purifiers for 2026
What Makes an Air Purifier Smart?
Most air purifiers (not just smart ones) have sensors that measure the density of various airborne pollutants such as nitrogen dioxide (NO2, a toxic gas from car exhausts and power plants), PM2.5 (particulate matter smaller than 2.5 microns in size, including industrial emissions and tobacco smoke), PM10 (particulate matter up to 10 microns, including dust, mold, and pollen), and VOC (volatile organic compounds, or potentially harmful gases from things like cleaning products and paint).
Smart air purifiers typically feature Wi-Fi radios that enable them to connect to a companion app, which displays your home's air quality. Some apps offer graphs of your air quality over time. Dyson breaks it down by pollutant, showing charts for each one.
Most smart air purifiers feature an auto mode that automatically adjusts the fan speed based on the level of pollution detected. They also typically allow you to set up an air purifying schedule, so the machine automatically turns on and off at specific times. Some models feature support for Alexa, Google Assistant, and Siri, allowing you to control them with voice commands.
If a smart air purifier is out of your budget, consider the $69.99 Amazon Smart Air Quality Monitor. This monitor tracks airborne pollution levels around the clock. You can pair it with a traditional air purifier to save money.
Common Contaminants and Their Health Effects
Some sources of indoor air pollution are obvious, like cigarette smoke, household cleaning products, and pet dander. Others are less so.
The US Environmental Protection Agency (EPA) states that thousands of products—including air fresheners, dry-cleaned clothing, and office equipment such as copiers and printers—emit VOCs that can lead to a range of health effects, from headaches to cancer. Moreover, concentrations of VOCs are typically much higher indoors than outdoors.
Anything that causes smoke—such as cooking, burning candles or incense, or lighting up a fireplace—can lead to elevated concentrations of particulate matter. The EPA says PM10 and smaller can "get deep into your lungs" and, in some cases, your bloodstream. Inhalable particles, especially PM2.5, which is 30 times smaller than the average human hair, may pose a greater risk to those with heart and lung diseases such as asthma, chronic obstructive pulmonary disease (COPD), congestive heart failure, and coronary artery disease. Most smart air purifiers detect PM10 and PM2.5, but some high-end models also report the density of PM1.0 (particulate matter 1 micron or smaller).
Humidifiers can help relieve cracked lips and dry skin, but if you’re not careful to use distilled water and clean them often, they can provide a fertile breeding ground for bacteria and mold, which is then pumped into your air. Gas stoves, especially when not properly vented, can emit unsafe levels of NO2, which can irritate the respiratory system and exacerbate or contribute to the development of asthma.
Another gas pollutant to worry about, especially if you're renovating or redecorating your home, is formaldehyde. This chemical is found in many household items, including carpets, flooring, furniture, rugs, insulating materials, particleboard, plywood, paint, varnishes, and wallpapers. Long-term exposure to low levels of formaldehyde can cause irritation of the skin, eyes, nose, and throat. Higher levels can cause some types of cancer.
Dyson says that formaldehyde is 500 times smaller than 0.1 microns, making it difficult to capture. Not all air purifiers can detect and break down formaldehyde, and this feature typically comes at a premium price, so that's something to consider while you shop. Check out our in-depth reviews to see which contaminants each model detects and captures.
In some cases, exposure to airborne pollutants may not cause immediate symptoms, but it can lead to serious health problems in the long run. For this reason, the EPA says, "it is prudent to try to improve the indoor air quality in your home even if symptoms are not noticeable."
Buying an air purifier isn't the only way to improve your indoor air quality. Other steps you can take include eliminating the sources of your air pollution, opening a window (as long as the outdoor air quality is good), and regularly vacuuming and dusting surfaces.
HEPA vs. Ionic vs. Activated Carbon: Which Filtration Method Is Best?
The machines on this list combat airborne contaminants using High-Efficiency Particulate Air (HEPA) filters, activated carbon filters, ionic technology, and/or UV light.
HEPA air purifiers are the most popular. To comply with the current baseline standard, HEPA filters are tested and certified to remove at least 99.97% of dust, pollen, mold, bacteria, and any other airborne particles as small as 0.3 microns. There are different levels of HEPA filters, but in general, you want to make sure the model you buy meets the baseline standard (many that do have a "True HEPA" label) and stay away from those marketed as "HEPA-like," "HEPA-type," or "HEPA-style," which might not be as effective.
Recommended by Our Editors
According to Wirecutter, a NASA study found that HEPA filters can actually capture almost 100% of particles as small as 0.01 microns (10 nanometers), well exceeding the baseline standard. To put that in perspective, COVID-19 is about 60 to 140 nanometers, H1N1 influenza is about 80 to 120 nanometers.
Meanwhile, activated carbon filters are filled with porous carbon that traps gases such as NO2 and VOCs, as well as foul odors, from the air. Activated carbon filters are often combined with HEPA filters, which do not remove gases.
The Dyson Purifier Cool TP07 features a 360-degree filter with a HEPA layer that captures allergens, bacteria, mold spores, pollen, and other pollutants, and an activated carbon layer that removes gases and odors. It also doubles as an oscillating fan. The version that destroys formaldehyde, called the Purifier Cool Formaldehyde TP09, costs $100 more. Dyson says its latest air purifiers, including the TP07 and TP09, not only meet the baseline HEPA filter standard but are also fully sealed to the HEPA H13 standard, meaning they can remove 99.95% of particles down to 0.1 microns.
The only downside to HEPA and active carbon models is that the replacement filters can be costly (around $50 to $100) and wasteful.
Other models, such as the Sharp FXJ80UW, combine HEPA, activated carbon, and ionic technologies. Sharp's model features an ion-generating unit that creates positively and negatively charged ions using water and oxygen molecules in the air and disperses them throughout the room. The ions then actively attach to and break down airborne pollutants, such as bacteria, mold, and viruses, before returning to the air as invisible water vapor. Sharp says the technology reduced 94% of E. coli bacteria, up to 87.7% of mold fungus, and 90.3% of MS2 virus in a closed laboratory over a four-hour period.
The primary concern about ionic air purifiers is their potential to produce ozone gas molecules, a lung irritant that can exacerbate asthma symptoms and lead to a range of other health issues. The safety of ionic air purifiers came into question in the mid-2000s after it was revealed that the then-popular Sharper Image Ionic Breeze air purifier produced ozone (an issue that eventually bankrupted the company).
As the California Air Resources Board (CARB) warns, some ozone-producing devices are still marketed as air purifiers. The Clean Air Agency maintains a list of potentially hazardous models to avoid.
All models on our list that utilize ionic technology are EPA-compliant, CARB-certified, and considered safe for use in your home for extended periods.
The Best Smart Air Purifier for Large Rooms
Recommended for rooms up to 1,076 square feet, the Dyson Big+Quiet has the widest coverage area of any model on this list. As a more affordable alternative, the Morento HY4866-WF has the same stated coverage area, but you'll need to change the filter more frequently than with the Dyson model. As another top-rated alternative for large rooms, we also highly recommend the Rabbit Air A3 (1,070 square feet).
(Credit: John R. Delaney)In my roughly 1,000-square-foot, single-level home, most of the smart air purifiers I've tested can detect elevated levels of air pollution from several rooms away. Sometimes, when I'm frying veggies in the kitchen, the Dyson TP07 from the other end of my house even detects cooking smoke and automatically kicks on.
Can Air Purifiers Really Reduce Allergies?
According to the EPA, the effectiveness of air purifiers in reducing allergies caused by larger particulates, such as pollen, dust, mold, and animal dander, is somewhat controversial.
"Most of these particles are found where they settle on surfaces in the home, rather than in the air," the EPA says. "They cannot be removed by an air cleaner unless disturbed and re-suspended in the air."
Before turning to an air purifier for allergy relief, consider what type of allergies you have. Air purifiers may be more effective at capturing pet dander compared with other types of allergens. According to the American Lung Association, pet allergens "remain suspended in the air for a long time, much longer than allergens from cockroaches or dust mites." Dust mites, on the other hand, "cling to particles that are too heavy to remain in the air for long" and settle into things like pillows, bedding, and furniture "within minutes."
(Credit: Angela Moscaritolo)In my experience, air purifiers aren't an infallible cure for pet allergies, but they can certainly help. To combat dander from my dog, I usually keep at least one air purifier running 24/7. I find it particularly helpful to have one blowing clean air in my direction at night when my symptoms worsen.