The best air purifiers use a HEPA (high efficiency particulate air) filter that better captures unwanted particles from the air. Standard air purifying filters range from coarse-to-medium in terms of design and filtration capacity, similar to how a coffee filter works. In Auto, the air performed worse, reducing particles by 0.3 microns at only 18.0% (ambient) and 26.4% (clean). In Silent, it performed even worse, reducing 0.3 micron particles by 6.5% (ambient) and 7.2% (clean).
And in Dark plus Auto, with its primary PECO purification system turned off and its fan at the equivalent of a medium setting, it reduced them by 21.3% (ambient) and 18.0% (clean). After careful testing and consideration, these are the best air purifier options according to our research. Any of the air purifiers below should improve indoor air quality, filter out smoke and particles in the air, and at the same time provide fresh air. Ion filtration technology is not a big advantage, but it also doesn't produce significant ozone, as tested by the California EPA.
If you want an air purifier for a medium-sized room, the Coway HEPA air purifier is one of the best air purifiers with one of the most adventurous looks. The Blueair Blue Pure 411 is a simple and straightforward purifier with a smart design and a good investment. You get particulate and carbon filtration (activated carbon filter removes odors, pet dander, airborne allergens, and airborne gaseous contaminants) that will work well in a 160 square foot room, making it the best overall air purifier for rooms small. Some devices, such as the Sharp air purifier, don't even offer as much cleaning power at almost double the price.
If you have the money and want a super-powered air purifier or if you prefer a purifier to cover your entire house than buy one for each room, the Coway Airmega 400 could be the best air purifier for you. This thing costs a dime but you get 1,560 square foot air cleaning coverage. It's also important to note that many of the best air purifier models I tested have been going in and out of stock in recent months due to demand during the pandemic and in the midst of wildfires. While that could mean that some of the above options are out of stock, we've decided to keep our recommendations published so you can use them and find the best product for you.
For the above devices, I mainly considered power for price (i.e., the higher the CADR and the lower the price, the better). Secondly, I looked at additional cleaning modes, usefulness of controls, overall design and noise level. The best air purifier looks elegant enough to fit modern decor, can work as desired with minimal manipulation and can clean the air thoroughly and quietly. Like the Blueair Classic 605, this purifier is one of four air purifiers tested by Consumer Reports for an “Excellent” rating on both highest and lowest speed settings.
Like other Blueair purifiers, this model uses HepaSilent technology which can filter 99.97 percent of particles down to 0.1 microns according to the company. This Levoit air purifier is a Good Housekeeping seal holder thanks to its combination of value, performance and intelligent design. In particular, its three-stage filtration which includes true HEPA filter helps capture even smallest airborne contaminants in rooms up to approximately 400 square feet. A built-in precision laser sensor accurately monitors particles in room and automatically adjusts fan speeds as needed.
The purifier is also incredibly quiet working at only 24 dB which you will appreciate if it is placed in your bedroom. One of our staff evaluators has been operating unit for several months at home and says that light hum is quite quiet at night. Then there are intelligent capabilities including Levoit app which allows you to monitor air quality in real time view filter life and set schedules. Air purifiers are designed to eliminate indoor air pollution from cooking car emissions dust fire among other things so they can help businesses restaurants trying to improve air in their indoor spaces too.
If you think benefits of an air purifier can help someone in your own home it's always worth talking to an allergist. You can also find models built for smaller rooms or to move smaller volume of air which lowers prices some also employ class of minerals known as zeolites whose extremely fine pores allow them to function as molecular filters. The HEPA filter is also treated with antibacterial coating that according to Aeris “reduces risks of infection by replacing filters” You can use Dyson app to deliver real-time air quality reports that also include temperature humidity almost all air purifiers come with their filters wrapped almost all have stickers on machine or warnings on leaflet to remove wrappers but it's still common mistake use these items to clean air in your home reduce sources of respiratory problems limit infiltration of new particles similarly you'll want to keep an eye on clean.