Specification

11
Noise
Blueair’s whisper-silent operation is a result of the HEPASilent™ filtration technology. The patented
Blueair technology allows the fan to push air more easily through the filter, making it possible for the
unit to deliver high air flow with low noise. With high cleaning capacity even at lower speeds, Blueair
units are the perfect air purifiers for rooms where silence is desirable, such as bedrooms.
Background
Noise from air purifiers are mainly produced from the fan or motor and the air pressure through the
filter. High noise can cause severe annoyance and even affect health, causing physical and mental
stress. The following references can be used as guidelines when comparing noise levels:
Normal speech at three feet distance: 65 dB •
Standard vacuum cleaner: 70 dB•
Normal business office: 50 to 60 dB.•
Bedrooms at nighttime (for adequate rest and sleep): 35-40 dB•
Learn more about noise:
http://www.epa.gov/air/noise.html
Testings and results
Testing is conducted at Blueair testing facilities where A-weighted sound pressure levels, dB(A), are
measured in a normal sized room, 74m
3
(2.6 cu. ft.). The testing room has a mix of soft and hard
surfaces in order to simulate a normal living room or bedroom. A class 1 graded sound level meter,
according to standards IEC.651, IEC.225 and IEC.804, is positioned at 1 meter (3.3 ft) distance
from the units front side and at a height from the floor that equal to half of the units height.
Measured sound levels of Blueair units:
203 270E ECO10 403 450 503 603 650E
Normal speed
(dB)
32 32 32 32 32 32 32 32
Maximum
speed (dB)
56 56 49 52 52 66 66 66