Why Blueair Replacement Filters work so Efficiently to Purify your air.

Blueair HepaSilent™ Filter Technology features the Blueair Progressive Filter. The Blueair Replacement Filter with the highly efficient built-in pre-filter, traps six times more dirt and particles than many other air purifiers and only genuine Blueair Replacement filters provide this exceptional performance. This is because of Blueair’s progressive filtration, by initially imparting an static electrical charge on incoming pollen, allergens, pet dander, mold spores, dust and other contaminants to permanently adhere to the millions of fibers deeper in the filter structure. Most other filters have a thin layer of different size fibers throughout the filter. Blueair filters have millions of ultra thin fibers in three progressive layers. This Progressive Filter design resists premature clogging, the filters are made from a network of very fine hypo-allergenic fibers. This design permits much longer, continuous filtration at peak levels and helps extend the filter life. Because of this filter design air flows more freely through the filters. This is why Blueair units deliver more clean air at a faster rate with less noise than any other air purifier.

First Layer: Large particles such as dust and pollen are captured in the first layer consisting of larger fibers.  In this stage particles are electrically charged and trapped by direct contact with the filter fibers.  

Second Layer: This layer consists of a finer fibers that collect smaller particles such as bacteria and allergens.  This layer of the filter intercepts the smaller particles that escaped the first layer.

Third Layer: In this layer, much smaller particles like viruses, mold, pet dander and minute particles are filtered out.  This layer consists of ultra-fine fibers, as small as 0.5 micron.  Minute Particles enter this layer with an imparted negative charge and easily adhere stick to the fibers, thus capturing particles as small as 0.1 micron at 99.97% efficiency.