Running a cooling van in reverse.

  • Thread starter Thread starter Frank Martin
  • Start date Start date
F

Frank Martin

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.
 
Jason said:
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.
Click to expand...


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
 
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


Normally "cold air in" at the bottom, "hot air out" at the top.
 
JS said:
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.
Click to expand...

Macase used to make computer cases like that. I agree - the filter design
was fantastic.
 
Jason said:
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.
Click to expand...


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