Do HEPA Filters Effectively Remove Dust from the Air?

Air purifiers with HEPA filters are the most effective way to filter dust from your space. These devices are designed to capture pollutants, allergens, and other toxins from the air, but their efficiency in removing dust will depend on the specific characteristics of the device. For people with asthma and other respiratory issues, ASL and AAFA certified air purifiers are recommended for the best results. Are you looking for a way to reduce dust in your home? An air purifier may be the answer. Air purifiers work to remove a large number of pollutants from the air, including dust.

But do they really work? Not only do ionizers help keep the air fresh, but they also emit charged particles that help air purifier filters capture contaminants that would otherwise be too small to filter. According to the EPA, a HEPA filter can remove 99.97% of airborne particles up to 0.3 microns in size. Air purifiers with HEPA filters can capture particles from SARS-CoV-2, the virus that spreads COVID-19. While air purifiers with HEPA filters claim to almost completely clean the dust in your home, they can't remove most “hazardous substances”. Every model included in the Good Housekeeping Institute's rigorous guide to the best air purifiers you can buy has an authentic HEPA filter. Therefore, although HEPA can easily filter out all common contaminants, such as dust, pollen, mold, and bacteria, most of them are fine particles smaller than 2.5 microns, and they are the most annoying because they cause health problems.

In this phase, the HEPA filter is used, which can handle at least 99% of the particles, depending on the grade of the filter. EPA agents warn that air purifiers have limited functionality when it comes to gas filtration and that filters must be replaced frequently to achieve optimal performance, usually every three months or so.