How does the 3-stage filtration work?
Air pollution can be divided into 3 basic groups: Particulate, Biologicals and Volatile Organic Compounds. The BEAM HEPA Air Filtration Systems have 3 stages of filtration designed to capture pollutants that make up each category of airpollution. • The Prefilter (first stage) filter captures large particulate such as dust and sloughed-off skin. By capturing the large particulate, the Prefilter protects the HEPA filter allowing it to efficiently filter out much smaller particulate. • The HEPA filter (second stage) captures 99.97% of airborne particulate at 0.3 micron in size. This size of particle makes up approximately 85% of particles in the air which can include: pollen, dust-mite carcasses and feces, pet dander, cigarette smoke and Biologicals, such as: viruses, mold spores, bacteria and fungi. Particles that are 0.3 micron are invisible to the human eye and small enough to travel into the lungs. In an environment with a particle count of 1,000,000 per cubic foot at 0.3 micron, the
