HEPA - Wikipedia
网页HEPA (/ ˈhɛpə /, high-efficiency particulate air) filter, [1] also known as high-efficiency particulate absorbing filter [citation needed] and high-efficiency particulate arrestance filter, [2] is an efficiency standard of air filters. [3] Filters meeting the HEPA standard must satisfy certain levels of efficiency.
What is a HEPA filter? | US EPA - U.S. Environmental Protection …
网页2024年9月4日 · It is an acronym for "high efficiency particulate air [filter]" (as officially defined by the U.S. Dept. of Energy). This type of air filter can theoretically remove at least 99.97% of dust, pollen, mold, bacteria, and any airborne particles with a …
How do HEPA air filters work? - Explain that Stuff
网页2024年8月4日 · An easy-to-understand explanation of how HEPA filters clean the air by using densely matted fibers to trap dust and dirt particles.
What is a HEPA Filter and How Does it Work? – Smart Air
网页2024年4月17日 · HEPA stands for “high-efficiency particulate air” (filter). HEPA filters are incredibly effective at capturing almost every size of particle. They can capture viruses, bacteria, pollen, PM2.5, allergens, and more.
What is a HEPA filter and its benefits? - Dyson
网页HEPA (High Efficiency Particulate Air) is an air filter efficiency standard – a certification of a filter’s performance. HEPA is defined as a filter that captures 99.97 per cent of particles down to 0.3 microns and is tested using a standard by an organisation called the IEST.
9 of the Best HEPA Air Purifiers & How to Choose - Healthline
网页2021年7月30日 · A high efficiency particulate air (HEPA) filter is a pleated device that can remove particles from surrounding air. A number of devices use these filters, such as air purifiers, which are...
HEPA Filter Types + Mechanisms Of HEPA Filter Filtration
网页HEPA filters are made out of thousands upon thousands of neatly intertwined fiberglass fibers. In this overview article about HEPA filters, we will explore: What HEPA filters actually are, and what kind of particles they capture (dust, smoke, pollen, etc.).
Everything You Need to Know About HEPA Filters
网页2024年7月2日 · HEPA stands for high-efficiency particulate air. Learn how HEPA filters work and how to choose one as well as cost, care, and the importance of clean air.
What is a HEPA filter? 4 Important Functions Reviewed
网页2023年3月22日 · HEPA stands for high-efficiency particle arresting, it is an air (pleated mechanical filter) filter that can get rid of 99.97% of dust, mold, bacteria, pollen, or any harmful airborne particles bearing a size of 0.3 microns (particle sizes).
high-efficiency particulate air system - Encyclopedia Britannica
网页2024年8月30日 · High-efficiency particulate air system (HEPA system), particulate air-filtration system designed to capture at least 99.97 percent of fine airborne particles larger than at least 0.3 micrometre (0.00001 inch; 1 micrometre = 10−6 metre), as specified by the United States Department of Energy (DOE)