Case Fan Installation

  • Thread starter Thread starter Clayton
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Clayton

Which way should a case fan be installed, the writing on the centre of the
fan pointing inside of the computer or pointing to the outside of the
computer?

Cheers
 
Clayton said:
Which way should a case fan be installed, the writing on the centre of the
fan pointing inside of the computer or pointing to the outside of the
computer?

Cheers
Click to expand...
I you want to blow air into the case then make the wires on the inside of
the case
if you wANT TO BLOW OUT THEN MAKE THE WIRES POINT OUT OF THE CASE.
hopes this helps. This is usualy the standard for fans. i am no gaurenteeing
any thing
 
Usually you would install two fans, the one on the back of the case blowing
cool air in sucking air into the case, and the one at the front of the case
extracting the air, blowing out. If you only have one fan mount at the back
of the case blowing out, taking the hot air out of the system.
 
In the front - out the back!

--
Regards,

Richard Urban
Microsoft MVP Windows Shell/User

Quote from: George Ankner
"If you knew as much as you thought you know,
You would realize that you don't know what you thought you knew!"
 
That depends, If you want to keep your hard drive cool in the front out the
back, otherwise to help cool the CPU in the back out the front.
 
Gee

If you mount a case fan on the back panel to blow in, it will suck warm air
from the power supply fan back into the system.. not a good idea at all..
 
You are wrong!

Why would you ever draw air in from the rear when the power supply exhausts
it "very" hot air out the rear. You have a short circuit. The hot exhausted
air from the power supply will be sucked back into the case raising internal
case temps.

--
Regards,

Richard Urban
Microsoft MVP Windows Shell/User

Quote from: George Ankner
"If you knew as much as you thought you know,
You would realize that you don't know what you thought you knew!"
 
Clayton
If you look at the fan closely you will see a little arrow that point the
way the fan blows.
The normal fan placement procedure is low front fan(s) blows cool air in
usually over your HD and high back fan(s) blows the hot air out.This way you
get flow thru ventilation with the hot air in the case rising and being
sucked out by the back fan(s)
Fans come with 3 ratings..........decibel for noise the lower the better ,
movement of air per cubic meter(cfm) the higher the better and
RPM...revolutions per minute.The object is find a fan that is quiet and
moves a lot of air.

peterk
 
peterk said:
Clayton
If you look at the fan closely you will see a little arrow that point the
way the fan blows.
The normal fan placement procedure is low front fan(s) blows cool air in
usually over your HD and high back fan(s) blows the hot air out.This way you
get flow thru ventilation with the hot air in the case rising and being
sucked out by the back fan(s)
Fans come with 3 ratings..........decibel for noise the lower the better ,
movement of air per cubic meter(cfm) the higher the better and
RPM...revolutions per minute.The object is find a fan that is quiet and
moves a lot of air.

peterk
Click to expand...

Uh, CFM stands for Cubic Feet per Minute.

For the same flow rate (CFM), big slow fans are quieter than small fast fans.

This PC case has a pair of 120mm fans -- the front fan blows in, and the
rear fan blows out; that's in addition to the pair of fans built into the PS,
and the CPU cooler fan, and the VGA (AGP) cooler fan. I've noticed that fans
are much cheaper than the stuff they cool.
 
I know what happens as I have corrected many systems that were put together
by unknowing persons. In each case the internal temperatures have dropped by
4-5 degree C. You can blow air on the CPU through the side of the case (many
custom cases have this available as an option) without any consequence. I
have never seen case instructions that mention anything other than an
exhaust fan being mounted in a rear case position.


Hot air in a computer neither rises nor sinks. It get intermixed with the
air stream created by the existing fans. That is why warm air coming in
through the rear will inexorably raise the internal temps over a period of
time. The air coming in through the front is the coolest. I suggest you
invest in a portable T/C meter and prove this to yourself. Fluke makes a
fairly decent one and is not too expensive. You can connect two T/C's and
measure temps at two different points. Experiment all you want. You will
find out what really happens when you short circuit the air flow..


--
Regards,

Richard Urban
Microsoft MVP Windows Shell/User

Quote from: George Ankner
"If you knew as much as you thought you know,
You would realize that you don't know what you thought you knew!"
 
Gee said:
And tell me what does hot air do sink or rise?????
Try it on your systems and see what happens.
Click to expand...

Correct, kinda. In still air, hot air rises due to gravity, due
in turn to the fact that hot air is less dense than cool air.
But, when the air is moved by fans in a PC case, the fans totally
overwhelm the effect of gravity.
 
in peters defence what he said is technically correct, although it's like
saying "rate of movement per mile...mph" the actual words contained in the
anagram need not be the only ones to define it...though it would be helpful,
peter

peterk wrote in message ...
 
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