Blueair 200 Series Smoke Filter is the ideal choice for allergy sufferers and other health-conscious individuals that need high-efficiency particle removal plus gas and odor control. The SmokeStop filter is a progressive carbon filter with a honeycomb-type structure that improves airflow and has hundreds of odor and gas absorbing carbon pellets. The filter contains 2.0 lbs of coconut shell activated carbon impregnated with a 70/30 blend of Potassium Hydroxide (KOH) and Potassium Iodide (KI). The carbon eliminates volatile organic compounds (VOC), which are responsible for odors.

　　- Our nontoxic polypropylene filter contains millions of ultra- thin fibers that trap tiny particles as they pass through the pleats

　　- 99.97% filtration efficiency

　　- Blueair's patented HEPASilent technology

　　- Efficiency is measured on level 1