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EFFECT OF DUST FILTERS ON AIRFLOW
Our Kanomax 6803
Anemometer does not get much mention in SPCR, and only brief use in
extended fan tests. This is an expensive ($845 today) instrument of high precision
able to read as little as 40 FPM air velocity to as high as 7800 FPM with 1%
accuracy. I spent an hour with the Kanomax 6803, the mounted fans in the Air
240 case, and the removed dust filters. The results are discussed in the captions
for the revealing photos below.
One interesting aspect of these experiments is that I could easily hear
the effect of the filters on fan speed: It actually went to a lower pitch and
got slightly rougher sounding, with more turbulence. It was clear that the fan
speed was reduced by the filter.
All this tells us that when used on the intake side of the fan, Corsair's dust
filter blocks about 40% of the airflow. Used on the exhaust side, it blocks
over 50%. With this solid new evidence of just how restrictive the dust filters
in the Corsair Air 240 are, there's no getting around my need to revisit this
build with all filters removed. Yes, PC silencing is an iterative process.
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