*HELP* Install Fan air flow downwards or upgwards inside the case on the bottom.

[aya90]

Hello i still able to install a 140mm fan on the bottom of interior case.

I was wonedring the air should push upwards or downwards ?

Using NZXT 140mm Performance Case Fan

Cooler master 922 red case

 

[LennyRhys]

If there is enough space between the bottom of the case and the surface on which the case sits, you should use the bottom fan as an intake.

Looking at it from a purely scientific point of view, heat rises so you're best to have intakes low and exhausts high.

 

[Enablingwolf]

Looking at it from a purely scientific point of view, heat rises so you're best to have intakes low and exhausts high.

Which can be explained with the Archimedes principle.

In our application, with essentially a convection box. Why fight the forces. Instead use it for greater efficiency. In from the bottom, out on top.

It just makes sense to have the furthest from the hot parts. Drawn in, (sort of like a reservoir.) Then removed as quickly as possible. Nearest the hottest parts. Fans simply direct the air in a manner you want. Higher volume fans, move more air per minute. With the higher capacity. You can remove heat faster.

Removing obstructions of the airflow. Helps make the heat removal more efficient. Hence why some of us wire manage. You can then get by with lower CFM fans.

 

[aya90]

Okay so the Fan air flow should point downwards on the bottom of the case ?

Heres the picture of my case and the i want install on the #4 Bottom fan

 

[aya90]

Okay another question is

My CORSHAIR 850AX FAN installed on the bottom should point upwards or towards down on the vent holes ?

I asked some people and 50% of them said up and down

 

[Enablingwolf]

In from the bottom of the case. Out from the top.

 

[aya90]

Okay so the fan face down

 

[aya90]

In from the bottom of the case. Out from the top.

How bout the PSU ?

The fan face down or up ?

 

[Enablingwolf]

I replied to your PM, about the direction of fans and PSU. If you're still having issues understanding. I can use pictures. If need be.

For other readers..

The easy way to tell the direction the fan blows air. The side with the wire, is the direction of the airflow. Otherwise dust and dirt will get inside the fan motor.

 

[aya90]

Please use pictures

 

[Enablingwolf]

I used the image you initially contributed. Added orientation of fans and some text. It is not about the brand of the fan or how many blades. 99.99% of computer fans operate in the same fashion..