Combine Fans?

Shampoo

Shampoo

Shampoo

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Joined
28 Apr 2009
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I've just ordered an Akasa fan from the well known auction site and I got sent three! so rather than leave the spare ones doing nothing I thought I'd ask here about this. Can you join two fans together to increase airflow or is that just silly? :confused:

Thanks
 
Not silly to ask, people use them "push / pull" on radiators and cpu heat sinks so i don't see why not, assuming you put them so the air flow is the same way. Never head of it being done just as a "dual" case fan though.
 
It could possibly make them a tad quieter, but apart from that im not sure of any real difference as both will be pulling air at the same speed, they dont have a heatsink between them slowing the air down, if you think about it.
 
Would only help if they were at right speeds. A lot of tests I have seen is that two fans will make no difference but will probably be louder due to air movement hitting second blades. I have seen some built with two sets of blades but as they are more one unit it think they synced better together. A gap between them, like 10 cm probably helps keep the air moving but am not sure how much benefit this is.
On rads or heatsinks a push pull setup is fine though as there is a big enough gap between them. Just two fans ontop of eachother might cause some problems.
 
I'll give the 10cm gap a try on the front top intake, perhaps it'll get the air to the components with a little more force than just the single fan on it's own having to push a good 10/12" before it reaches the board etc.

Thanks :)
 
Two fans stacked are inferior to one alone. If however, they are spinning in opposite directions (not possible with what you've got) they are loud but very, very effective.

Use them as case fans, or either side of a heatsink/radiator. If there's still a spare, cable tie it to your ram or northbridge
 
what do you mean about them being in opposite directions? I thought that would be bad as they would just be fighting over the same air, trying to move it in different directions
 
One spinning clockwise, one anticlockwise. Both pushing the same direction, but instead of the air coming out rotating it tends to come out moving in a straight line, so all the momentum is in one direction. Mental static pressure, not quiet.

Can't do this with normal case fans since they're unidirectional, the blades are curved in one direction. If you reverse the voltage polarity it'll spin the other way, but with little effectiveness as the blades are now the wrong shape
 
You might want to take note of the fan speed.. if you have the cpu fans spinning on high, you might want to adjust the speed of the exhaust fan of your pc.. trying imagining force feeding air into the rare case fan that is sucking it up at a lower speed :p
 
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