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m³/h --> CFM

post #1 of 14
Thread Starter 
I'm on the Noctua site looking at some fans...they claim these specs

Size 120x120x25 mm
Bearing SSO-Bearing
Blade Geometry Straight-Blade-Design
Rotational Speed (+/- 10%) 1200 RPM
Rotational Speed with U.L.N.A. 600 RPM
Airflow 81 m³/h
Airflow with U.L.N.A. 41 m³/h
Acoustical Noise 17 dB(A)
Acoustical Noise with U.L.N.A. < 6* dB(A)

So I'm looking at 17-23dba with how many CFM? I have no clue how to convert that...the relation works out to

1 meter = 3.2808399 feet
1h = 60minute..duhh...

So would I multiply 40, or 80 by 3.2808399 and divide by 60? That gives me like 4cfm.. haha
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Kopisaurus
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post #2 of 14
Does area cubed come to mind
    
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post #3 of 14
Thread Starter 
No, should it
Kopisaurus
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Kopisaurus
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post #4 of 14
Try...
http://www.sciencemadesimple.net/volume.php
link corected

Airflow with U.L.N.A. 41 m³/h
cubed
    
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post #5 of 14
ForceXXI
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post #6 of 14
Thread Starter 
Its cubed though, not square...
ah thanks tank, so its onyl like 50cfm :<
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Kopisaurus
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post #7 of 14
47.43 CFM = 81 m^3/h
Back on Intel
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post #8 of 14
Quote:
Originally Posted by tankman12 View Post
Sweet, you rule
Quote:
Originally Posted by slow'puter View Post
47.43 CFM = 81 m^3/h
You too
    
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post #9 of 14
Quote:
Originally Posted by Kopi View Post
Airflow 81 m³/h
I hope I worked it out right;

81 x (3.2808399 x 3.2808399 x 3.2808399) / 60 = Airflow 47.67CFM
post #10 of 14
Thread Starter 
Yep, you did it by hand but a machine just told me the same thing...i was really hoping these fans would be near 80 though
Kopisaurus
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Kopisaurus
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