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It also has a handy night mode for quiet operation while you're sleeping and a remote control that allows you to change settings from across the room. For even more detailed information and setting control, you can connect the device to the Dyson Link app or even pair it with your Alexa, Siri, or Google Assistant. One downside is that the light on the front dims in Night mode, but doesn't turn off entirely, which can be annoying if you like to sleep in total darkness and want to set up the air purifier in a bedroom. The Coway Airmega 250 is the larger, more powerful sibling of the Coway Airmega 150.
Are there any downsides to air purifiers?
When we tested air purifiers in our lab, we tried out every feature the devices offered to determine how well they worked and if they were actually valuable. The Dyson Purifier Cool was one of the best air purifiers we tested, significantly decreasing the number of particles in the air in just five minutes. After adding smoke and pet hair to the room, the model reduced the PM 2.5 (particulate matter) levels from 999.9 to 115.2 after five minutes and to just 8.0 after 10 minutes. Understanding the air quality in your home can feel confusing and overwhelming, but the Levoit Core 400S Smart True HEPA air purifier makes it easy.
Replace the Air Handler Filter
It’s easy to forget the occasional obligation of replacing your purifier’s filters—so set a calendar reminder. Purifier manufacturers typically recommend replacing them annually, but check the manual; some models call for less frequent or more frequent replacement. Most air purifiers arrive with the filters installed—but they are also sealed in plastic wrappers. The HEPA filters should have an arrow or other marking to indicate the correct orientation. If you specifically need to address high levels of volatile organic compounds (VOCs), we recommend the Austin Air HealthMate HM400.
Blueair Blue Pure 311i Max
Let’s take a closer look at what whole house air filters are and how they work. Flat filters can efficiently capture large particles like dust, pollen, and lint and prevent them from entering your heating and cooling system and spreading to your home. However, they can’t catch smaller-size air pollutants, such as viruses, bacteria, and mold spores.
That said, we were impressed with the results during testing—the MA-10 made a noticeable difference in the air quality, dropping the PM2.5 about 90% within 30 minutes. Instead of purchasing multiple appliances to keep your home clean, cool, and comfortable, the Dyson Purifier Humidify+Cool Formaldehyde is a space-saving, three-in-one option. In addition to being a powerful air purifier, it also has a built-in humidifier and a fan that oscillates to provide cooling to the whole room. We observed that the purifier made an even more noticeable difference in the air quality of the room on the highest setting. The design is very sleek and intuitive, and changing the filter is incredibly easy—we couldn’t see how even a new user could mess it up. On low mode, we found that the Bissell Air400 Professional air purifier is whisper-quiet at just 40 decibels, though it can be a bit noisy when run on high (80 decibels).
Also great: Blueair Blue Pure 311i Max
Contact our office to learn more about our superior line of residential air filtration products. The relatively high price of these filters is somewhat justified by their “smart” technology. With it, you can check the status of your filter from your smartphone to see if and when it needs replacing. However, unless you’re worried about needing to replace your filter early, you can also just set a calendar reminder.
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The first factor to consider when selecting the best air purifiers for your home is how many square feet your home has and its floor plan. The Alen BreatheSmart 75i is a sleek air purifier designed for large, open-concept living spaces up to 1,300 square feet. This freestanding Smart Home purifier is a great choice if you have a studio apartment, condo, or open-concept home. The PH950 model is the best air purifier for homeowners looking for a dual-purpose product that provides air purification and humidification for large rooms and homes up to 4200 square feet.
We have also removed from this list many since-discontinued models we tested. The 200M shares the Mighty’s display-shutoff feature, which we value highly because it turns off the overly bright air-quality indicator lamp and makes the 200M much more conducive to bedroom use. Visually, the 200M differs from the Mighty in that it has a square grille instead of a round aperture; like the Mighty, it’s available in both black and white versions. The problem is that many manufacturers dramatically overstate their machines’ abilities. A lot of “living room” purifiers are barely powerful enough to keep a walk-in closet clear. That experience has helped me gather objective data on their long-term purifying performance and any mechanical degradation.
Testing takes place in labs at the Institute and in consumer testers' homes, allowing us to evaluate the devices in real-world conditions. "Note that there are no widely used performance rating systems for portable air cleaners or filters designed to remove gasses," says Tim Carroll, EPA spokesperson. "Activated carbon filters can be effective [for removing gasses], provided that there is a large amount of material used in the filter." When testing the Honeywell HPA 104 Hepa Air Purifier in our lab, we found that it took more time to remove particles from the air than other models.
So both larger and—counterintuitively—smaller particles are captured more efficiently. We’ve pushed this machine beyond its on-paper limits in various ways—including running its filters 24/7 for two years, twice as long as recommended—and it has never wavered or weakened. It offers great value on initial and long-term costs, and its compact form, quiet operation, and display-light shutoff make it especially well suited to using it in a bedroom or living room. CR recommends more than three dozen models in our air purifier ratings, and most use a HEPA filter; a vast majority also have carbon filters to help assist in the removal of odors. These models meet Consumer Reports’ criteria for safety, performance, value, and reliability. For more information, read our article on the best and worst air purifiers of the year.
According to Energy Star, the Dyson Purifier Cool works best in rooms around 125 square feet, which is about the size of the average bedroom. This means it's less suitable for larger areas of your home, like your living room or kitchen. Your home likely has airborne contaminants floating around in the air you breathe, says Kenneth Mendez, president and CEO of the Asthma and Allergy Foundation of America (AAFA).
The process of charging particles, called ionization, may produce trace amounts of ozone, a lung irritant. Electronic filters cost $600 to $1,000 installed and require a 120-volt electrical outlet. Such systems are passive; as long as the fan is running, they are constantly filtering all the air in your house. The secret is that they can capture tons of debris while using relatively porous filter material, thanks to the huge surface area that dirty air has to pass over—about four times as much filter media as on a 1-inch filter. A MERV 13 is a great choice at this size, delivering excellent air quality for a reasonable price.
For example, blue light means the air quality is excellent, but red or purple indicates poor to bad air quality. For example, I don't live somewhere with much smoke, so I can stick with the model designed for allergies. With its easy-to-use functions, I would recommend this one to those who are looking for a straightforward model to get the job done. That said, this is also one of the most quiet models on my list, which would also make it suitable for a bedroom or nursery. When allergy season hits, I can even check pollen data through the Vesync app and adjust the purifier accordingly to make up for sudden increases in pollen.
In a 35-minute test, we run the machine on its absolute highest setting. In a separate test, we use the highest setting the machine can run while keeping the noise below 50 decibels; this is around the upper limit of what would be tolerable for normal conversation, watching TV, or sleeping. The Blue Pure 211i Max aced our tests, and on top of its powerful performance, it stands out for its energy efficiency, quiet operation, user-friendly features, and good looks. If pollen or related allergies keep you from opening windows, run your air conditioner or forced-air cooling system with a clean air filter.
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