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determining air flow direction of a fan.. - Page 2

post #11 of 31
Plug it in if you're still unsure.
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post #12 of 31
Quote:
Originally Posted by faraz1729;12523497 
The absolutely sure-fire way without turning on the fan is to judge based on concavity and convexity.

The concave side will exhaust. The convex side will intake.

This is correct. I've had fans with stickers on both sides. redface.gif
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post #13 of 31
Quote:
Originally Posted by Kick;12523561 
the side with the 4 supporting things that come out from the middle is the exhaust.



ex:

gentle_typhoon_1.jpg

you see the 4 supporting things that come out? that's the side that air blows to ( exhaust )

41u8JR3bCaL._SL500_AA300_.jpg

the side that doesn't have the 4 support things = intake like the above image shows

+1

This is how I've always determined the exhaust
post #14 of 31
Thread Starter 
Quote:
Originally Posted by Kick;12523561 
the side with the 4 supporting things that come out from the middle is the exhaust.



ex:

gentle_typhoon_1.jpg

you see the 4 supporting things that come out? that's the side that air blows to ( exhaust )

41u8JR3bCaL._SL500_AA300_.jpg

the side that doesn't have the 4 support things = intake like the above image shows

thanks i appreciate it!
post #15 of 31
np man. gone through my share of fans and used that technique and hasnt failed me yet.
    
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post #16 of 31
That or, all the fans I have ever owned have arrows on the side. One shows airflow direction and the other shows direction of blade rotation.

Fan_Arrows.JPG
Silence is Golden
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post #17 of 31
Quote:
Originally Posted by imadude10;12523798 
That or, all the fans I have ever owned have arrows on the side. One shows airflow direction and the other shows direction of blade rotation.

Fan_Arrows.JPG

yeah but OP specifically stated there was no markings...
    
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post #18 of 31
Unless it's an Arctic Cooling cage fan, the air goes over the struts.
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post #19 of 31
Quote:
Originally Posted by mongoloid;12523584 
sticker side...almost always exhaust.

the side that has no struts/grill protecting the fan blades is usually intake.

The unusual exhaust orientation. biggrin.gif

L2l8Q.jpg
post #20 of 31
Forgot about Papst. Some of theirs turn clockwise, too.
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