which way to face fans on hc

hung · Jun 10, 2005

for my chieftec case, i just drilled out the rivets for the hds and floppy, now i have room for a dual heatercore, but which way should i face the fans? should the fans be getting air through the bottom right and pushing it through the rad and into the case or should the fans get the air within the case, and push it outside through the bottom right, heres a pic, choose which one you guys think would be better, 1 or 2. (this is with a fan shroud of course)

lowfat · Jun 10, 2005

neither.

I believe having the fans pulling air through the heatercore is a tad better.

citronym · Jun 10, 2005

could be...

hung · Jun 10, 2005

ah so you think i should put the fans on the left side and have it pulling air through the bottom right correct?
anybody else support this? does sound correct

johan851 · Jun 11, 2005

Yeah, the general consensus is that fans provide better pressure pulling than pushing. Fans with heatercores are a little bit like watercooling pumps...it's not so much flow that's important, but the pressure it can deliver. One a side note, that's why a lot of us use 38mm thick fans instead of the 25mm's.

It's not a huge deal, whatever is more convenient for you. If you have a choice though, pull.

gungeek · Jun 11, 2005

johan851 said:
Yeah, the general consensus is that fans provide better pressure pulling than pushing. Fans with heatercores are a little bit like watercooling pumps...it's not so much flow that's important, but the pressure it can deliver. One a side note, that's why a lot of us use 38mm thick fans instead of the 25mm's.

It's not a huge deal, whatever is more convenient for you. If you have a choice though, pull.

agreed. I've found that having the fan pull air makes the rad/shroud/fan a more compact unit for placing it in the case. With a double fan rad, I think the location restrictions will determine which is best, but definitely use a shroud. That is more important than push or pull for the fan.

tinker77 · Jun 11, 2005

Pulling is also quiter which is always good in my book.

sicloan · Jun 11, 2005

your drawing is the same config just on different sides of the radiator. The cold air should go through the radiator, then out the fans... meaning a pull config.

Fighter2a · Jun 11, 2005

I agree that the fans should be pulling air through the radiator from the outside of your case. So like example #2 with the fans on the other side.

hung · Jun 11, 2005

thx a lot guys
but with a pull config, ill still need a shroud? weird

whitebloodcell · Jun 11, 2005

The_WRATH said:
thx a lot guys
but with a pull config, ill still need a shroud? weird

Why is that weird? Shroud makes sure there are no deadspot and channels the air flow directly over the fins. (Poor explanation perhaps) Whether the fans are pulling or pushing is irrelevant.

hung · Jun 11, 2005

ah! deadspots forgot lol ok hehe

pplapeu · Jun 12, 2005

The_WRATH said:
for my chieftec case, i just drilled out the rivets for the hds and floppy, now i have room for a dual heatercore, but which way should i face the fans? should the fans be getting air through the bottom right and pushing it through the rad and into the case or should the fans get the air within the case, and push it outside through the bottom right, heres a pic, choose which one you guys think would be better, 1 or 2. (this is with a fan shroud of course)

8888888888888

Assuming you use a shroud pulling would direct air through the core in a more even manner. I tried setting a desk fan blowing on a radiator and it did not cool well.

which way to face fans on hc

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