Combine two 120mm fans?

smsmasters · 23 Feb 2007 at 17:19

I have enough space to combine two 120mm fans as a rear exhaust.

Anyone tried something like this? Is there more airflow this way?

monkeypants · 23 Feb 2007 at 17:21

You get more airflow, but the noise is increased loads. I did it with two 80mm fans on a socket A heatsink.

smsmasters · 23 Feb 2007 at 17:23

Anyone know what to use to combine two on top of each other?

stinka · 23 Feb 2007 at 17:29

smsmasters said:
Anyone know what to use to combine two on top of each other?

interesting you would just need to space them with a couple of metal washers between them on each bolt hole but i dont think it would work to increase air flow because one would interfere with the air flow of the other IMO

stinka

WJA96 · 23 Feb 2007 at 17:52

Use Sunbeam Rubber Fan Screws. That decouples them as well. It's genuinely not the best configuration though. It works much better with some form of spacing or 'tunnel' between them otherwise you get interference at the fan blades and choppy airflow. You definitely don't get the performance benefit you would expect, otherwise they'd be selling them.

Brizzles · 23 Feb 2007 at 18:05

WJA96 said:
Use Sunbeam Rubber Fan Screws. That decouples them as well. It's genuinely not the best configuration though. It works much better with some form of spacing or 'tunnel' between them otherwise you get interference at the fan blades and choppy airflow. You definitely don't get the performance benefit you would expect, otherwise they'd be selling them.

As above ^^^.

You will need ducting ( more than a few washers !! ) to create the space between the 2 fans.

Check out :

http://www.spodesabode.com/content/article/ductguide/1

The best ducting guide imo.

Mark