A high-efficiency particulate air (HEPA) filter is a high-quality device that the Department of Energy (DOE) states must remove 99.97% of particulates from the air.
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Air purifiers improve the quality of indoor air by removing contaminants. These contaminants may be any airborne particles, such as dust, mold, bacteria, and pollen. HEPA filters must follow certain standards that the DOE sets.
Air purifiers may offer benefits that include:
- Relief from some asthma symptoms: Removing air pollutants may relieve some asthma symptoms and cause a person to rely on an inhaler less often. However, a 2018 systematic review concluded there is no clear evidence showing this to be true.
- Removal of harmful chemicals and odors: A 2015 study evaluated the effects of office workers after exposure to some chemical and odorous contaminants. The research found increased cognitive function and productivity with lower contaminant exposure.
- Reduced risk of airborne diseases: There is conflicting evidence around whether air purification reduces the spread of airborne diseases. One 2020 review suggests that air purifiers may help control some diseases, including COVID-19, in settings such as dental clinics. However, other research suggests purifiers may result in further spreading.
- Improve sleep: Being able to regulate breathing better is important for sleep quality. A 2020 study found older adults with insomnia and anxiety benefited from air purification, which led to better quality sleep.
As well as improving indoor air quality, a purifier may reduce dust and the buildup of mold by trapping the dust particles before they settle on surfaces. This means they may also benefit people with allergies such as allergic rhinitis.
Below is a list of some HEPA air purifiers for a person to consider, based on factors such as cost, dimensions, and special features.
Please note that the writer of this article has not tried these products. All information presented is purely research-based.
BlueAir HealthProtect 7770i
BlueAir claims this filter works well for extra-large rooms, as it covers up to 674 sq. ft and completely filters the air in 12 minutes, at a rate of about five times per hour. It is only available in white.
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Source: https://www.medicalnewstoday.com/articles/hepa-air-purifier