Specification

14
Microbe removal efficiency
Blueair air purifiers use Particle filters for removal of airborne particles including airborne microbes
such as bacteria, virus and mold. The naturally anti-bacterial filters are made of polypropylene and
mechanically filter out airborne particles without use of harmful chemicals.
The polypropylene filter is hydrophobic and water resistant which prevents bacteriala and mold growth.
The absence of water dries out and kills the microbes that are captured.
Background
A great number of diseases and infections are caused by airborne pathogens, which are transmitted
in the air. This makes the control of airborne microbes hugely important.
Testing and results
In 2010, Kitasato Research Center of Environmental Sciences (Japan) tested the filtration efficiency of
Blueair air purifiers and showed how well they remove bacteria, virus and mold.
Tests on a Blueair 650E fitted with particle filter, running at full speed in a 10 m
3
(353 cu. ft.) chamber,
show that the efficiency in removing all three kinds of airborne microbes from the air reaches a mini-
mum of 99% within 10 minutes and more than 99.9% within 20 minutes.
Bacteria filtration efficiency
Natural reduction of airborne bacteria is shown as reference in the graph. The bacteria level after
running the unit for 10 minutes is 99% lower than the natural reduction. After 20 minutes, the level is
over 99.9% lower.
0
25000
50000
75000
100000
125000
150000
175000
200000
225000
250000
0 10 20
Bacteria level
Time (minute)
Bacteria filtration efficiency
–– reference
–– with filter
> 99.9% elimination
at 20 minutes
99.9% elimination
at 10 minutes