Installing extra case fan - Which direction should air flow?
John Roberts
Pete wrote in message <68cghi$n...@bgtnsc02.worldnet.att.net>...
>I am adding a fan to the front of the case (by cpu). Which
direction should the
>air be flowing. Air blowing outside, or blowing in? Which is
best for maximum
>cooling. The case I am using has a lot of vent holes along the
back, by the slots.
I'd say blowing in. If it's a standard AT case, you'd be
fighting the power supply fan by pulling air out. If it's an
ATX case where the power supply blows in, you'll still be fine
blowing into the case and exhausting out the back. On my tower,
I have the P/S fan blowing out, a second fan at the top above
the P/S blowing out, and a third fan on the front bottom blowing
in. Runs very cool.
John Bowen
i originally installed my 2nd case fan, mounted on the front of my ATX, to
blow out. My reasoning is that it would help to evacuate the heated air.
My P297DLS, running 2 PII processors, would normally run around 47 degrees,
Celcius. i recently reversed the front case fan, to blow in, like the ATX
power supply fan. My motherboard temp is now running consistently 10
degrees cooler, celcius. Big difference in temps.
John Bowen.
>
>
Pete
I am adding a fan to the front of the case (by cpu). Which direction should the air be flowing.
Air blowing outside, or blowing in? Which is best for maximum cooling. The case I am using has a
lot of vent holes along the back, by the slots.
Thanks,
Pete
Mike J
Pete,
I believe ATX cases require the front case fan to be blowing air out (since
the power supply fan sucks in), while non-ATX cases require the front fan
to suck in. Hope this helps. :]
Mike J
Pete <worl...@att.net> wrote in article
<68cghi$n...@bgtnsc02.worldnet.att.net>...
Gary Fox
Your stating that the fan is near the CPU. The fan is there to cool the CPU
not suck hot air from the rest of the system across the CPU to keep it warm.
The fan should bring outside air into the case and blow it across the cpu.
Make sure the vent holes in the front of the case a open so air can get to
the fan inlet.(the plastic front of the case).
Mike J wrote in message <68ci23$i...@bgtnsc03.worldnet.att.net>...
Ferret
In at the bottom, out the top mounted power supply, since heat rises, or in the case of a desktop,in at
the front, out the back mounted power supply. If you point both fans out, you suck in lots of dirt
through your floppy door, card slots, keyboard connectors, etc.
Make sure you have a filter on the new fans intake.
Pete wrote:
> I am adding a fan to the front of the case (by cpu). Which direction should the air be flowing.
> Air blowing outside, or blowing in? Which is best for maximum cooling. The case I am using has a
> lot of vent holes along the back, by the slots.
>
> Thanks,
>
> Pete
--
|=-Please remove nospam from address before replying-=|
SeamusO
my front fan blows in..as described by the motherboard manual ( tx97xe ,
inwin500 minitower). This allows for airflow directly across the pci/isa slots
and the devices connected to them. The rear fan that I am planing on
installing will be an exhaust fan (top rear of case) that should help disappate
the heat coming off of the power supply, memory, and help cool the cpu.
SeamusO
Mike J wrote:
> Pete,
> I believe ATX cases require the front case fan to be blowing air out (since
> the power supply fan sucks in), while non-ATX cases require the front fan
> to suck in. Hope this helps. :]
>
> Mike J
>
> Pete <worl...@att.net> wrote in article
> <68cghi$n...@bgtnsc02.worldnet.att.net>...
inswell
Hi
The best effect you can achieve when you blow air at the object you what
to cool down.
Make sure that you have also some extra holes for the hot air to escape.
Adding an extra fan to suck the hot air out
would be an extra luxury.
Pete wrote:
> On Wed, 31 Dec 1997 04:08:16 GMT, worl...@att.net (Pete) wrote:
>
> >I am adding a fan to the front of the case (by cpu). Which
> direction should the air be flowing.
> >Air blowing outside, or blowing in? Which is best for maximum
> cooling. The case I am using has a
> >lot of vent holes along the back, by the slots.
> >
> >
> >
> >Thanks,
> >
> >Pete
>
> Thank you, I appreciate all of the input from you guys...
>
> Pete
Rick Lindsay
If the case has a rear secondary fan location:
For conventional ATX, PS blows in, put the extra fan in the rear blowing in.
For unconventional ATX, PS blows out, put the extra fan in the rear blowing out.
For conventional AT, PS blows out, put the extra fan in the rear blowing out.
Basically match the airflow direction of the power supply with a secondary fan at the rear.
I fear drive bay air starvation whenever a front secondary fan location is used. The only time
this location is suggestted by Elan Vital to be used is when the Asus P65UP5 Dual P2 board
is installed in the T-10 case, and then the rear also has a secondary fan and tthe power supply
uses exhaust airflow.
These airflows have been appoved by Asus & Elan Vital for the T-10 medium tower cases.
Rick Lindsay, Lindsay Computer Systems, http://www.jumpnet.com/~lcs
Austin, Texas. 512-719-5257. Asus based systems, Asus Products.
Advanced Systems.
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Pete
Paul Miller
Elan Vital say this
Posted by ElanVital Corporation on November 10, 1997 at 20:17:20:
In Reply to: T-5AB Chasis Fan posted by Ed Peralta on November 09, 1997 at
00:01:09:
: Hi!
: What would be the best direction of the front chasis Fan of a T-5AB???
Should it be going in the Casing or Out??
: Thanks a lot and all the best!
: Ed
Dear sir,
Thank you for your mail.
The direction of the fan which is in the front of our T-5 depends on the
direction of fan inside the switching power supply. If the fan of the power
supply blows the CPU, the fan on the front should extract the hot air out.
On the contrary, if the fan of the power supply extract the hot air out, the
fan on the front should blow the cool air in.
We hope this helps.
ElanVital Corporation
Pete wrote in message <68cghi$n...@bgtnsc02.worldnet.att.net>...