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Dual push vs. single push

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June 10, 2013 3:35:27 AM

Is there any advantage to having two similar fans strapped together on the same fan slot?
Like for example two 1800rpm/23CFM on the exhaust port, both puling air from the case through the same grill.
[edit] Wouldn't adding a second fan do the same as replacing one fan for a longer fan?

If so what should the total CFM and noise look like?
Appreciate any help.

More about : dual push single push

June 10, 2013 3:54:43 AM

It does work but its not ideal. Is your fans not blowing enough air? I would just pick up one with a faster speed.
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June 10, 2013 4:05:41 AM

maestro0428 said:
It does work but its not ideal. Is your fans not blowing enough air? I would just pick up one with a faster speed.


Increasing the speed increases the air volume but it also increases the noise.
By adding another fan under 2000rpm there should be no noticeable increase in noise.
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June 10, 2013 4:15:55 AM

It would increase the static pressure of the air being moved (how hard it is being pushed), but in terms of CFM (Volume of air moved) it wouldn't make a difference.
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June 10, 2013 4:19:47 AM

http://www.youtube.com/watch?v=VUbpb23yTK8

I know this is just extreme, but it does kind of answer ur question.

I would recommend push/pull instead of dual push, you do want the fans air that is being inducted to be pulled away so that more cooler air can be pushed in.
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June 10, 2013 5:38:31 AM

mafisometal said:
http://www.youtube.com/watch?v=VUbpb23yTK8

I know this is just extreme, but it does kind of answer ur question.

I would recommend push/pull instead of dual push, you do want the fans air that is being inducted to be pulled away so that more cooler air can be pushed in.

I think that you can/should only use a push/pull setup when you're using a radiator for water cooling.
This is not my case .
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June 10, 2013 5:43:48 AM

Dextron said:
Is there any advantage to having two similar fans strapped together on the same fan slot?
Like for example two 1800rpm/23CFM on the exhaust port, both puling air from the case through the same grill.
[edit] Wouldn't adding a second fan do the same as replacing one fan for a longer fan?

If so what should the total CFM and noise look like?
Appreciate any help.


at best you would have the exact same CFM. the second fan being back to back with the first would simply create a wall especially since the chances of them being in sync (even exact same fans can differ by 10% from spec) would be rare.

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June 10, 2013 11:33:55 AM

Push pull works best. That is what I would go with.
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June 10, 2013 11:51:32 AM

maestro0428 said:
Push pull works best. That is what I would go with.


you fail to understand the concept the OP asked about, it does not have anything to do with a "push pull" set up on a heatsink or radiator (he even stated as much).

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June 10, 2013 12:16:11 PM

Maybe he has one fan hanging out the back of his case :) 
Or, for front fans that are between the case and the front bezel, I've wondered about putting one on the other side of the hard drive bays pulling the air from the other side.
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June 10, 2013 12:51:52 PM

mace200200 said:
Maybe he has one fan hanging out the back of his case :) 
Or, for front fans that are between the case and the front bezel, I've wondered about putting one on the other side of the hard drive bays pulling the air from the other side.


then the back panel of the case would do little in separating the fans. as for your latter point in your case, that can help airflow as one fan (or pair) would be separated by the length of the HDD cage from the other fan (or pair).

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