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With air pollution levels intensifying across the globe, according to the World Health Organization, it’s important to think about air quality at home. “There are strong sources of particles and gasses in our homes which may affect our health, including cleaning and scent products, cooking, dust, pets, smoking, mold and mildew, and more,” says V. Faye McNeill, an atmospheric chemist and professor at Columbia University. “If there are high levels of pollution outside, like that from wildfire smoke or urban smog, this may also elevate the air pollution levels indoors.”
Air purifiers can help by reducing the amount of harmful pollutants and allergens lingering indoors. They can also combat “off-gassing” from new furniture and minimize volatile organic compounds (VOCs) emitted by materials such as paint and furnishings, according to a recent study. They’re also great for pet owners and people with respiratory conditions like asthma.
The best air purifier for you should have filtering capabilities for your entire space. It’s best to find an air purifier that has a high-efficiency particulate air (HEPA) filter or something equivalent. Extra features that enhance value, such as smart sensors, air quality indicators, or humidification capabilities, are bonuses.
With that in mind, our top pick overall is the Dyson Purifier Humidify + Cool Formaldehyde. We were impressed by its multifunctionality and formaldehyde sensors. We also found more top-notch air purifiers that meet specific needs, such as households with pets and shoppers on a budget. Here are all of our top picks.
Our picks for the best air purifiers
The best air purifiers of 2024
Best air purifier overall: Dyson Purifier Humidify + Cool Formaldehyde
PHOTOGRAPH COURTESY DYSON
Buy it now at Dyson
Why we like it: This air purifier has a HEPA and activated carbon filters for tackling a wide range of indoor pollutants. Plus, it has a humidifier, cooling capabilities, and removes formaldehyde, a toxic chemical found in household products and building materials. Dyson says this air purifier is also built with a sensor designed to monitor and react to changes in air quality. The aerodynamic design is a bonus that will look good in most homes.
Keep in mind: Some customers note the humidification function can be noisy or ineffective over time.
Product Details: Weight: 18 pounds | Speed settings: 10 | Size: 36 x 12 x 11 inches | Noise level: 46 decibels (on speed setting 4)
Best budget air purifier: Coway Airmega 400
PHOTOGRAPH COURTESY COWAY MEGA
Buy it now at Coway
Why we like it: The Coway Airmega 400 has comparable features to the Dyson air purifier but at a more affordable price. Like the Dyson, the Airmega 400 is equipped with two filters: a True HEPA and one made of activated carbon. The filters remove up to 99.97 percent of airborne particles, allergens, and odors, according to the company. The Airmega 400 also has a “smart mode” that assesses air quality and automatically adjusts fan speed.
We also love that the Airmega 400 lets you set a schedule via an app on your phone. It’s small, yet covers a large area without making too much noise. The washable pre-filter also helps keep costs down.
Keep in mind: When you set a schedule on the app, you’ll receive an alert each time the mode changes. That may not be disruptive during the day, but could be at night.
Product Details: Weight: 24.7 pounds | Speed settings: 3 “smart” modes | Size: 14.8 x 14.8 x 22.8 inches | Noise level: 22-52 decibels
Best air purifier for allergies: Blueair Blue Pure 211i Max
PHOTOGRAPH COURTESY AMAZON
Buy it now on Amazon
Why we like it: The Blueair Blue Pure 211i Max is one of the best air purifiers for allergy sufferers. It’s got a mechanical and electrostatic filtration system that grabs onto allergens such as pollen, pet dander, mold spores, and dust mites. The combination particle and carbon filter also traps odors and harmful gasses, leaving the air fresh and clean. It’s quick and efficient too, pulling in air from all sides and rapidly purifying the air in large rooms with a Clean Air Delivery Rate (CADR) of 590 cubic feet per minute (CFM).
The filter connects to a smart phone app, which lets you set up a schedule and track filter usage. It also has voice-activated controls.
Keep in mind: Some customers report that the Blueair Blue Pure 211i Max can be noisy at higher levels of filtration. It’s nearly silent on low levels and in night mode.
Product Details: Weight: 22.7 pounds | Speed settings: 5 | Size: 14.4 x 14.4 x 22.7 inches | Noise level: 23-53 decibels
Best air purifier for pets: Briiv Air Filter
PHOTOGRAPH COURTESY BRIIV
Buy it now at Briiv
Why we like it: The tiny but mighty Briiv Air Filter is our top choice for households with pets. With its glass dome filled with moss, it looks like an elegant terrarium that you can display on a table or counter, away from rambunctious pets. But the Briiv’s good looks doesn’t mean that it skimps on air purifying capabilities. The moss works together with coconut fibers and a filter cartridge to help eliminate pet odors and airborne particles like dander.
Keep in mind: The Briiv doesn’t come with a HEPA filter. The company recommends replacing the moss and coconut fibers every year. The filter cartridges should be replaced every three months.
Product Details: Weight: 1.9 pounds | Speed settings: Auto | Size: 8.6 x 6.3 inches | Noise level: 45 decibels
Best air purifier with a HEPA filter: RabbitAir MinusA2
PHOTOGRAPH COURTESY AMAZON
Buy it now on Amazon
Why we like it: The RabbitAir MinusA2 has tons of rave reviews, making it our top pick for an air purifier with a HEPA filter. The high-efficiency particulate air filter in this machine traps 99.97 percent of particles as small as 0.3 microns, according to the company. Some reviewers note they use the RabbitAir in cigar rooms.
We also like that the RabbitAir MinusA2 has a customizable filtration system. You can from a variety of specialized filters set for allergies, pet odors, or toxins. This machine also has smart sensors that automatically adjust fan speed based on real-time air quality data. Since it connects to Wi-Fi, you can set controls through an app on your phone.
Keep in mind: Some reviews note issues with the smartphone app and WiFi connectivity.
Product Details: Weight: 19.4 pounds | Speed settings: 5 | Size: 20 x 21.4 x 7 inches | Noise level: 25.6- 51.3 decibels
Best splurge: Molekule Air Pro
PHOTOGRAPH COURTESY AMAZON
Buy it now on Amazon
Why we like it: The Molekule Air Pro is one of the pricier air purifiers out there. But it’s FDA-approved as a Class II medical device, thanks to its patented air filtration technology, called photo electrochemical oxidation (PECO). This relatively new system eliminates airborne pollutants (including viruses, mold, and VOCs) at a molecular level. The system also helps prevent harmful microorganisms from growing within the purifier itself. Sensors and an auto mode mean the machine can adapt to changes in air quality as it runs. All in all, the Molekule Air Pro offers great performance with a beautiful, modern look.
Keep in mind: Molekule filters are expensive and must be changed twice a year. This machine is not compatible with other filters.
Product Details: Weight: 22.9 pounds | Speed settings: 6 | Size: 23.1 x 10.9 inches | Noise level: 33-64 decibels
How we chose the best home air purifiers
In compiling our list of the best air purifiers, we tested units and conducted extensive research. That included analyzing product specifications, customer reviews, and expert recommendations. Our goal was to provide a curated selection of top-performing air purifiers that offer effective filtration, user-friendly features, excellent value, and longevity.
Third-party testing: Honest reviews of air purifiers by industry experts and average consumers provide firsthand insights, as well as a range of perspectives about specific models. These reviews often highlight pros and cons of various air purifiers, from their longevity and effectiveness to their user friendliness.
Brand reputation: A company’s reputation is an important factor in selecting the best air purifier, especially when considering their cost. It reflects the trust and satisfaction of consumers over time, which is why we prioritized well-respected brands.
Airflow abilities: How well air flows through an air purifier is crucial for ensuring efficient circulation and purification in a room. We looked for units with a Clean Air Delivery Rate (CADR), which indicates faster and more effective purification.
Tips for buying home air purifiers
Filter type
When shopping for an air filter, consider the type of pollutants you want to target, such as dust, pollen, pet dander, or odors. Choose a filter designed to address those concerns. There are several types of filters, such as HEPA, activated carbon filters, UV-C light purifiers, ionizers, and PECO. Look for air filters with a high CADR rating, which tells you the volume of clean air the purifier can deliver per minute.
Smart controls
Smart controls such as remote monitoring and control via smartphone apps are convenient for adjusting settings and monitoring air quality from anywhere. Additionally, consider prioritizing air purifiers with sensors that can automatically adjust fan speeds or activate purification modes based on real-time air quality data. Air purifiers with scheduling capabilities are great extras too for maximizing energy efficiency and convenience.
Value
When shopping for an air purifier, consider the upfront cost along with the long-term expenses, such as filter replacements and energy. You can look for certification by reputable organizations like AHAM (Association of Home Appliance Manufacturers) or Energy Star to ensure the air purifier meets quality and efficiency standards. Choosing a high-quality air purifier that will stand the test of time will ultimately deliver higher value.
Airflow abilities
The airflow in an air purifier is important. Besides ascertaining the type of purifier you need based on the size of your space, consider one with adjustable fan speeds or multiple fan settings to customize airflow to your needs. Pay attention to where you place an air purifier too—you want unobstructed airflow to maximize capturing airborne pollutants.
The size of your space
Before buying an air purifier, measure rooms you want to purify so you can choose an air purifier with adequate coverage. Larger rooms may require air purifiers with higher CADR ratings or multiple units. Additionally, take into account any factors that may affect air quality, such as high ceilings or open floor plans, as these can impact the effectiveness of the purifier. Finally, remember that it’s generally better to choose an air purifier rated for a larger space than necessary.
How to set up your air purifier
Once you find the right air purifier for you, the next thing to do is set it up in your space. Each machine will have manufacturer instructions, but here are some general guidelines to help you get started.
Choose an ideal location
Select a location in the room where the air purifier will have unobstructed airflow. Avoid placing the air purifier near heat sources, direct sunlight, or areas prone to moisture, as these factors can affect the machine’s performance.
Prepare the air purifier
Store extra parts and instruction manuals. Install any filters or pre-filters according to the manufacturer’s instructions, ensuring they are properly aligned and securely in place.
Plug in and power on
Plug the air purifier into a grounded electrical outlet. Turn on the power switch located on the unit or use the remote control, if provided, and get ready to tune your settings to your liking.
Set up smart apps and adjust settings
Depending on the model, adjust the settings such as fan speed, timer, and mode (e.g., sleep mode or auto mode) to your needs. Some models are controlled directly on the unit itself, while others are better controlled by downloading a connected mobile application. If the latter applies to your air purifier, make sure you are connected to a reliable WiFi source.
How to maintain your air purifier
Regular maintenance is essential to ensure your air purifier operates effectively and efficiently. Follow these guidelines to keep your air purifier in optimal condition for the long run.
Regular cleaning
Wipe the machine down regularly. Turn it off and unplug it before cleaning to avoid electrical hazards. Clean the exterior with a soft, damp cloth to remove dust and dirt buildup. Pay special attention to air intake vents, ensuring they are free from anything that could obstruct airflow.
Filter inspection and replacement
Check the condition of filters regularly, looking for signs of dirt, discoloration, or damage. Follow the manufacturer’s guidelines for inspecting and replacing filters, which helps your purifier maintain optimal air purification efficiency.
Interior maintenance
Periodically clean the interior components of your air purifier to remove dust and debris. You can use a soft brush or vacuum cleaner with a brush attachment to remove dust from fan blades, air vents, and other internal parts. Avoid using harsh chemicals or abrasive materials that could damage the unit.
Frequently asked questions
Are air purifiers loud?
Air purifiers vary in noise levels depending on their make and model. But many operate at a moderate sound level comparable to a fan or air conditioner when set to a medium or high level. Some high-efficiency models are designed to run quietly, when set to a low level or night mode.
What are the benefits of air purifiers?
Air purifiers help improve indoor air quality by removing airborne pollutants such as dust, pollen, pet dander, and smoke particles from the air. They can help alleviate sneezing, coughing, and other symptoms of respiratory conditions, such as allergies. Air purifiers can also reduce odors.
Are there any cons to air purifiers?
Air purifiers can be expensive. They require regular filter replacements or cleaning. They can also be disruptive to people who don’t like ambient sound at home.
How much does a good air purifier cost?
The cost of a good air purifier varies depending on factors such as brand, size, and features. Prices typically range from $200 to $700 or more. Replacement filters for air purifiers typically range from $30 to $200, depending on the model, and usually require annual or semi-annual purchases.
What are the different types of air purifiers?
The various types of air purifiers include HEPA (high-efficiency particulate air) filters, activated carbon filters, UV-C light purifiers, and ionizers. HEPA filters are effective at capturing airborne particles like dust and pollen, while activated carbon filters excel at removing odors and volatile organic compounds (VOCs). UV-C light purifiers and ionizers work by targeting and neutralizing airborne pathogens and allergens, offering different mechanisms for air purification.
Austa Somvichian-Clausen is a journalist and author based in New York City. Her work has appeared in numerous publications, including Travel + Leisure, Men’s Journal, and Yahoo Life.
*Although we are sharing our personal opinions of these experiences or products with you, National Geographic is not endorsing these experiences or products on behalf of anyone. It has not performed product safety testing on any of these products, did not manufacture them, and is not selling, or distributing them and is not making any representations about the safety or caliber of these products or experiences for individual consumers. Prices and availability are subject to change from the date of publication.
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