Will these fans run in reverse. I want to blow outside air
INTO the computer case. The fan is connected to terminals
on the mother board.
Frank

You can not do this with the supply leads. You need to unscrew the fan and
rotate it 180deg and screw back into place. Generally fans work better
sucking so best to duct to where air enters the case.
"Frank Martin" <fm@general.com.au> wrote in message
news:%23Dw%23XpEJJHA.3644@TK2MSFTNGP05.phx.gbl...
> Will these fans run in reverse. I want to blow outside air INTO the
> computer case. The fan is connected to terminals on the mother board.
> Frank
>

"Jason" <JAllen@Hotmail.com> wrote in message
news:%23NQTr%23EJJHA.4512@TK2MSFTNGP02.phx.gbl...
> You can not do this with the supply leads. You need to unscrew the fan and
> rotate it 180deg and screw back into place. Generally fans work better
> sucking so best to duct to where air enters the case.


The only way a fan could "work better sucking" is if it teleported part of
the air it sucked in elsewhere in the universe before blowing it out again.
Since the mass of air sucked in exactly matches the mass of air blown out of
the other side, the fan works equally well sucking or blowing.

I thought blowing was better if radiator/device is immediately after the fan
until I was told otherwise
"M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
news:48e47c29$1_1@glkas0286.greenlnk.net...
>
> "Jason" <JAllen@Hotmail.com> wrote in message
> news:%23NQTr%23EJJHA.4512@TK2MSFTNGP02.phx.gbl...
>> You can not do this with the supply leads. You need to unscrew the fan
>> and rotate it 180deg and screw back into place. Generally fans work
>> better sucking so best to duct to where air enters the case.
>
>
> The only way a fan could "work better sucking" is if it teleported part of
> the air it sucked in elsewhere in the universe before blowing it out
> again. Since the mass of air sucked in exactly matches the mass of air
> blown out of the other side, the fan works equally well sucking or
> blowing.
>
>
>

Normally "cold air in" at the bottom, "hot air out" at the top.

Jason wrote:

> I thought blowing was better if radiator/device is immediately after the fan
> until I was told otherwise
> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
> news:48e47c29$1_1@glkas0286.greenlnk.net...
>
>>"Jason" <JAllen@Hotmail.com> wrote in message
>>news:%23NQTr%23EJJHA.4512@TK2MSFTNGP02.phx.gbl.. .
>>
>>>You can not do this with the supply leads. You need to unscrew the fan
>>>and rotate it 180deg and screw back into place. Generally fans work
>>>better sucking so best to duct to where air enters the case.
>>
>>
>>The only way a fan could "work better sucking" is if it teleported partof
>>the air it sucked in elsewhere in the universe before blowing it out
>>again. Since the mass of air sucked in exactly matches the mass of air
>>blown out of the other side, the fan works equally well sucking or
>>blowing.
>>
>>
>>
>
>
>

Actually the best fan design I have seen was on a computer many years ago
where the fan took air from outside the case and created a positive pressure
inside the case. The outside air was filtered before it reached the fan,
resulting in no dust bunnies. Only thing you had to do was clean or replace
the filter every once in a while.

JS
http://www.pagestart.com


"Bob I" <birelan@yahoo.com> wrote in message
news:ua6q5oIJJHA.1156@TK2MSFTNGP04.phx.gbl...
Normally "cold air in" at the bottom, "hot air out" at the top.

Jason wrote:

> I thought blowing was better if radiator/device is immediately after the
> fan until I was told otherwise
> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
> news:48e47c29$1_1@glkas0286.greenlnk.net...
>
>>"Jason" <JAllen@Hotmail.com> wrote in message
>>news:%23NQTr%23EJJHA.4512@TK2MSFTNGP02.phx.gbl.. .
>>
>>>You can not do this with the supply leads. You need to unscrew the fan
>>>and rotate it 180deg and screw back into place. Generally fans work
>>>better sucking so best to duct to where air enters the case.
>>
>>
>>The only way a fan could "work better sucking" is if it teleported part of
>>the air it sucked in elsewhere in the universe before blowing it out
>>again. Since the mass of air sucked in exactly matches the mass of air
>>blown out of the other side, the fan works equally well sucking or
>>blowing.
>>
>>
>>
>
>
>

JS wrote:
> Actually the best fan design I have seen was on a computer many
> years ago where the fan took air from outside the case and created
> a positive pressure inside the case. The outside air was filtered
> before it reached the fan, resulting in no dust bunnies. Only thing
> you had to do was clean or replace the filter every once in a while.

Macase used to make computer cases like that. I agree - the filter design
was fantastic.

--
Shenan Stanley
MS-MVP
--
How To Ask Questions The Smart Way
http://www.catb.org/~esr/faqs/smart-questions.html

"Jason" <JAllen@Hotmail.com> wrote in message
news:%23NQTr%23EJJHA.4512@TK2MSFTNGP02.phx.gbl...
> You can not do this with the supply leads. You need to
> unscrew the fan and rotate it 180deg and screw back into
> place. Generally fans work better sucking so best to duct
> to where air enters the case.
> "Frank Martin" <fm@general.com.au> wrote in message
> news:%23Dw%23XpEJJHA.3644@TK2MSFTNGP05.phx.gbl...
>> Will these fans run in reverse. I want to blow outside
>> air INTO the computer case. The fan is connected to
>> terminals on the mother board.
>> Frank


Thanks, I'll try. I hope the connecting lead will be long
enough.

I tried using filter and push fan but dust still appeared inside the case.
"JS" <@> wrote in message news:%231YWAyKJJHA.2580@TK2MSFTNGP05.phx.gbl...
> Actually the best fan design I have seen was on a computer many years ago
> where the fan took air from outside the case and created a positive
> pressure inside the case. The outside air was filtered before it reached
> the fan, resulting in no dust bunnies. Only thing you had to do was clean
> or replace the filter every once in a while.
>
> JS
> http://www.pagestart.com
>
>
> "Bob I" <birelan@yahoo.com> wrote in message
> news:ua6q5oIJJHA.1156@TK2MSFTNGP04.phx.gbl...
> Normally "cold air in" at the bottom, "hot air out" at the top.
>
> Jason wrote:
>
>> I thought blowing was better if radiator/device is immediately after the
>> fan until I was told otherwise
>> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
>> news:48e47c29$1_1@glkas0286.greenlnk.net...
>>
>>>"Jason" <JAllen@Hotmail.com> wrote in message
>>>news:%23NQTr%23EJJHA.4512@TK2MSFTNGP02.phx.gbl. ..
>>>
>>>>You can not do this with the supply leads. You need to unscrew the fan
>>>>and rotate it 180deg and screw back into place. Generally fans work
>>>>better sucking so best to duct to where air enters the case.
>>>
>>>
>>>The only way a fan could "work better sucking" is if it teleported part
>>>of the air it sucked in elsewhere in the universe before blowing it out
>>>again. Since the mass of air sucked in exactly matches the mass of air
>>>blown out of the other side, the fan works equally well sucking or
>>>blowing.
>>>
>>>
>>>
>>
>>
>>
>
>

You need a fan powerful enough to create a "positive" pressure inside the
case.
That is to say the fan doing the pushing (air into the case) must overcome
the power supply fan which draws air from inside the case and then out the
back. I suspect your power supply fan was the cause of the dust.

Also some cases are equipped with cooling fans for the hard drives, not to
mention the Video Card fans.

JS

"Jason" <JAllen@Hotmail.com> wrote in message
news:%23ArwIRrJJHA.5516@TK2MSFTNGP03.phx.gbl...
>I tried using filter and push fan but dust still appeared inside the case.
> "JS" <@> wrote in message news:%231YWAyKJJHA.2580@TK2MSFTNGP05.phx.gbl...
>> Actually the best fan design I have seen was on a computer many years ago
>> where the fan took air from outside the case and created a positive
>> pressure inside the case. The outside air was filtered before it reached
>> the fan, resulting in no dust bunnies. Only thing you had to do was clean
>> or replace the filter every once in a while.
>>
>> JS
>> http://www.pagestart.com
>>
>>
>> "Bob I" <birelan@yahoo.com> wrote in message
>> news:ua6q5oIJJHA.1156@TK2MSFTNGP04.phx.gbl...
>> Normally "cold air in" at the bottom, "hot air out" at the top.
>>
>> Jason wrote:
>>
>>> I thought blowing was better if radiator/device is immediately after the
>>> fan until I was told otherwise
>>> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
>>> news:48e47c29$1_1@glkas0286.greenlnk.net...
>>>
>>>>"Jason" <JAllen@Hotmail.com> wrote in message
>>>>news:%23NQTr%23EJJHA.4512@TK2MSFTNGP02.phx.gbl ...
>>>>
>>>>>You can not do this with the supply leads. You need to unscrew the fan
>>>>>and rotate it 180deg and screw back into place. Generally fans work
>>>>>better sucking so best to duct to where air enters the case.
>>>>
>>>>
>>>>The only way a fan could "work better sucking" is if it teleported part
>>>>of the air it sucked in elsewhere in the universe before blowing it out
>>>>again. Since the mass of air sucked in exactly matches the mass of air
>>>>blown out of the other side, the fan works equally well sucking or
>>>>blowing.
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>
>