Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
high-efficiency particulate air system
Table of Contents
References & Edit History
Related Questions
Read Next
Florence Baptistery of Saint John, Italy
9 Historic Buildings in Florence
Beet. Beta vulgaris. Sugar beet. Two rows of harvested beets.
18 Questions About Farming Answered
Abstract vector hi speed internet technology background
History of Technology Timeline
Rooftop and patio gardens amidst modern office and residential towers in downtown city center, Vancouver, British Columbia, Canada. (green roofs, roof gardens)
The Evergreen Benefits of Rooftop Gardening
Binary Computer Code, Binary Code, Internet, Technology, Password, Data
How Does Wi-Fi Work?
Discover
jeans, denim, pants, clothing
Why Do We Say “A Pair of Pants”?
The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.
What If the President Is Impeached?
Martin Luther King, Jr.
Why We Celebrate MLK Day
Abstract vector hi speed internet technology background
History of Technology Timeline
Indian hijras participate in a religious procession in Gandhinagar, India, some 30 kilometers from Ahmedabad, on March 22, 2017. Hijra is a term used in South Asia which refers to transgender individuals who are born male. (gender identity, gender expression)
6 Cultures That Recognize More than Two Genders
American bison (Bison bison) also known as buffalo or plains buffalo on the prairie, western U.S.
What’s the Difference Between Bison and Buffalo?
Nazi Germany, Nazi SS troops marching with victory standards at the Party Day rally in Nuremberg, Germany, 1933. (Schutzstaffel, Nazi Party, Nurnberg)
Why Was Nazi Germany Called the Third Reich?

high-efficiency particulate air system: References & Edit History

Article Contributors

Primary Contributors

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Modified link of Web site: National Center for Biotechnology Information - PubMed Central - Assessing effectiveness of air purifiers (HEPA) for controlling indoor particulate pollution. Nov 06, 2024
Add new Web site: Cell Press - Heliyon - Assessing effectiveness of air purifiers (HEPA) for controlling indoor particulate pollution. Aug 30, 2024
Add new Web site: UW Courses Web Server - New technologies in HEPA filter development. Jul 04, 2024
Add new Web site: LiveScience - Do HEPA filters remove viruses? May 25, 2024
Add new Web site: National Center for Biotechnology Information - PubMed Central - Assessing effectiveness of air purifiers (HEPA) for controlling indoor particulate pollution. Sep 12, 2023
Corrected display issue. Mar 20, 2023
Add new Web site: Healthline - A Guide to HEPA Air Filters in HVAC Systems. Jan 19, 2023
Add new Web site: WebMD - HEPA Filters for Allergies. Dec 18, 2015
New article added. Apr 25, 2014
View Changes:
Article History
Revised:
By: