![]() To determine whether you can trust HEPA features you see on an air purifier you’re considering, Corbat says to look for “compliance” with an “accepted test method” like IEST RP-CC-001. Tests like these are based on standards created by organizations like the Institute of Environmental Sciences and Technology (IEST). Having a HEPA filter, by definition, should ensure efficient filtration.īut HEPA isn’t a centrally regulated standard, explained Michael Corbat, vice president of engineering for Rensa Filtration, so it’s up to companies and sometimes third-party laboratories to test filters. Particles larger than 0.3 microns have a difficult time fitting through the filter, and smaller particles move too haphazardly to pass through. HEPA filters should meet a Department of Energy standard of clearing out at least 99.97 percent of particulates that are 0.3 microns in size, the particle size that most easily evades filtration, according to the EPA. Shopping How to choose the right Roomba robot vacuum What is a HEPA filter? ![]() You can also control settings from the companion Blueair app or from an Alexa device with voice control. The purifier uses the brand’s HEPASilent technology, which Blueair says can filter 99.97 percent of particles down to 0.1 microns. In Consumer Reports testing, this air purifier was one of only four models tested that scored an “Excellent” for removing particles at both the highest and lowest speeds. We ordered them by their capacity in square feet. For each purifier, we list its capacity and efficiency rates, according to AHAM testing. Aligning with that guidance, the air purifiers below are AHAM-approved and/or recommended by Consumer Reports. Since we don’t test air purifiers ourselves, we rely on expert guidance to recommend the best air purifiers. For more on HEPA and CADR, see our primer on HEPA and CADR filtration testing. According to AHAM, your air purifier should have a CADR rating equivalent to about two-thirds the area of your space (in square feet). CADR tells you how much air (in cubic feet per minute) an air purifier can process within one minute. Clean air delivery rating, or CADR: The Association of Home Appliance Manufacturers (AHAM) works with independent laboratories to certify air purifiers that meet its standards.You can learn more about HEPA filters here. That’s why experts recommend you shop for HEPA-level filtration and note each air purifier’s clean air delivery rate (CADR) which gives you more information about how well an air purifier will clear a given space of contaminants (including tobacco smoke, dust and pollen), its primary purpose. High-efficiency particulate air (HEPA) filters: Every expert we spoke to agreed that HEPA is crucial for filtration, but HEPA isn’t a centrally regulated standard, so shopping for these filters can be complicated.There are two standards and testing procedures, HEPA and CADR, that help show how efficiently air purifiers clear the air in a room. Shopping What type of air fryer should you buy? How to find the best air purifier for youĮxperts agree that filtration is key when choosing an air purifier. To help guide your search for an air purifier that best suits your needs and budget, we consulted health and filtration experts to learn more about air purifiers and what you need to know before buying one. These airborne particles enter your lungs, causing irritation or triggering allergic reactions, explained Kenneth Mendez, president of the nonprofit Asthma and Allergy Foundation of America. SKIP AHEAD Best air purifiers| Other highly rated air purifiers to consider | What is a HEPA filter? | Tips for maintaining good air qualityĪir purifiers are designed to remove indoor air pollution from cooking, car emissions, or dust from wildfires, among other contaminants. Air purifiers, which filter particles from the air, can help reduce indoor air contaminants that arise from everyday life However, the truth might surprise you: According to the Environmental Protection Agency, the air inside your home can be more polluted than the air outside. If you live in wildfire territory, or a smoggy city, you may feel that the air inside your house is cleaner, or safer than the air outside. ![]()
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