stacked fans

SGCWill · 2 Aug 2007 at 18:21

OK so I stack two 22CFM 80mm fans, which will probably not give me 44cfm, does anyone know the formula to figure it out?

Cheers

Jokester · 2 Aug 2007 at 18:25

Having 2 fans front to back probably isn't going to achieve much if any extra flow.

Jokester

SGCWill · 2 Aug 2007 at 18:29

Jokester said:
Having 2 fans front to back probably isn't going to achieve much if any extra flow.

Jokester

What if there is a radiator between them - should have mentioned that

jongeeone · 2 Aug 2007 at 21:43

Still the same? just pulls the hot air away quicker i would imagine so in theory it will cool better

Tooks · 2 Aug 2007 at 22:25

Two fans seem to yield a 50% increase in CFM, so you'd be looking at roughly 30CFM, in theory.

http://www.overclockers.com/articles1155/

I'm running two single rads with push/pull fans, and I definately get a lower temp with that configuration than with one fan alone.

It is dependent on rad thickness too though, but basically you're reducing the resistance to airflow through the rad fins.

It will be noisier though.