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How to tell between intake and exhaust

post #1 of 18
Thread Starter 
i am asking this cause the fan i am concerned with cant be reaching without doing a lot of unnecessary screwing which i would rather avoid if possible and i hav a feeling that my high temps might be because it is exhaust rather than intake. I am talking bout a 120mm case fan. looking from inside the chassis, the blades are angled towards the mobo or inwards. Would that indicate intake or exhaust? thanks for the help
    
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post #2 of 18
Just plug it on the mobo, turn pc on...and feel with your hand wich way it blows.
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post #3 of 18
power it on and put some paper in front of it and see what way it goes.
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post #4 of 18
Thread Starter 
didnt think of that lol. cheers guys
    
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post #5 of 18
Correct me if I am wrong, the side of the fan where the motor is attached is the exhaust.
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post #6 of 18
cant you tell by the way its turning when you stop it with your fingers? I mean, slow it down, and you will see which way the blades are, and which way its turning
post #7 of 18
Quote:
Originally Posted by Hewlett-Packard View Post
cant you tell by the way its turning when you stop it with your fingers? I mean, slow it down, and you will see which way the blades are, and which way its turning
I am not sure if I would take this advice^^^

Sticking fingers in a fast spinning object just isnt the most intelligent thing to do

Just my .02
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post #8 of 18
You can tell by how the blades are bent (they are more flat towards the intake and more curved towards the exhaust side), by the side which has the support bars and implanted wires (the side with the support bars and wires usually is the exhaust), but most accurately of all, there is often an arrow showing the rotational direction and the airflow direction implanted on top of the fan's casing.
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post #9 of 18
You can tell just by looking at the fan. Look at it, the side you see with the motor and no fan grill is the intake side. The side with the fan grill (or anything blocking the blades, usually just an attachment on every corner to the center) is the side where air is pushed out.

Air is sucked in this side


Air is pushed out this side
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post #10 of 18
Quote:
Originally Posted by tankman12 View Post
I am not sure if I would take this advice^^^

Sticking fingers in a fast spinning object just isnt the most intelligent thing to do

Just my .02
Especially the delta 200CFM fans, I'm not going to be the one to test but imo it would cut your fingers off clean.
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