To select the best air purifiers, we focused on those that use high-efficiency particulate air (HEPA) filters, the gold standard for removing particles like dust, smoke and pet dander from the air ...

This includes homemade air purifying devices made from a box fan and an HVAC particulate air filter, he said. Montrose said these homemade purifying boxes are highly effective and cost-effective ...

The recent wildfires in Altadena and Pacific Palisades have been contained, but wildfire impact on air quality is something Californians should prepare for.

The removal of particulate radioactive material from exhaust air or gases ... maintenance and testing of fibrous air filters. Contents: 1. Introduction; 2. Fundamentals of filtration; 3.