Air Purifiers
Air purifiers are devices that remove pollutants from the air and improve air quality. Air purifiers do this either mechanically, using air filters, or using ionizers or chemical reactions. Read more to learn about air purifiers, how to choose the best air purifier, and how they can protect against viruses, wildfire smoke, air pollution and PM2.5.
How Do UV Light Air Purifiers Work and Can They Kill Viruses?
Air purifiers with UV light are marketed as effective virus killers, capable of targeting viruses such as COVID-19. UV light technology including far-uv, far-uvc, and UVGI are advertised to kill 99.9% of viruses. One in every four air purifiers displayed as top results on Amazon is labeled as a UV-C …
Do Air Purifiers Work With Window Open?
Will my air purifier still work with a window open? Recent test data from Smart Air, air purifiers can still significantly reduce PM2.5 in a room even when a window is slightly cracked. Here’s what you should know: The Obvious: Air Purifiers Most Effective With Windows Closed No one doubts …
Do Air Purifiers Use a Lot of Electricity? -The Hidden Cost of Air Purifiers
Energy costs are often overlooked when buying an air purifier. Although energy efficiency may seem minor, choosing an inefficient purifier can incur large electricity costs. In this article, we discuss how to choose an energy-efficient air purifier and also analyze the electricity costs of running some popular air purifiers. Comparison …
How Do HEPA Filters Capture Nanoparticles?
Many big purifier companies claim only their HEPA filters capture nanoparticles, like this Molekule ad. Although this claim is false, even journalists repeat this myth. Why is this belief so pervasive? What size micron is a HEPA filter? One reasonable explanation is that the definition of “HEPA” leads people down …
EN1822 HEPA Filter Testing Standard: Everything You Need to Know
Wondering what the EN1822 HEPA filter standard is, and when to use it? This article covers the scope and history of the EN1822 standard, the different EN1822 filter classifications, and the test methods used. Jump to the relevant section: EN1822 HEPA Filter Standard: Overview EN1822 and its latest version, the …
HEPA Filter Fan Placement: Should Air Purifiers Have the HEPA Filter on the Front or Back?
Should air purifiers have the HEPA filter on the front or the back–is it better to push or pull air? The Smart Air lab in Beijing ran tests of the same fan with the HEPA filter on either side, and the results contradict most people’s intuition. When I made my …
