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 ...

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.

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 ...

How Diesel Particulate Filters work How to avoid DPF problems How much is it to clean a DPF? A Diesel Particulate Filter — known as a DPF for ease — is part of a diesel car's exhaust system, designed ...

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

PM2.5 is defined as fine particulate matter of 2.5 micrometers or less in diameter -- so small it can only be seen through an electron microscope -- but because it is so small bypasses filters in ...