Understanding the Science

During a wildfire, smoke can significantly impact outdoor air quality, making it unsafe to breathe. Local officials may recommend staying indoors during a smoke event, but be aware that smoke can still infiltrate your home and affect indoor air quality. If you are...

Air cleaners can help reduce the health effects of certain airborne particles, such as dust and light spray mists, by removing small solid or liquid substances suspended in the air. Under optimal conditions, some air cleaners are effective at removing respirable-size...

The Minimum Efficiency Reporting Value (MERV) rating measures a filter's effectiveness at capturing particles ranging from 0.3 to 10 microns in size. Developed by the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE), this rating...

A HEPA filter, which stands for High Efficiency Particulate Air filter, is a highly effective type of air filter designed to capture airborne particles. Officially defined by the U.S. Department of Energy, a true HEPA filter can remove at least 99.97% of particles as...