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push vs pull

post #1 of 4
Thread Starter 
hi all.

im ordering all the bits for my W/C soon, and i might run into some problems fitting it all in my case with what i have to work with space wise.

can i use fans in pull? so cold air-->rad-->Fan--> warm air?

and will there be a negative effect doing this over push?

im using 38mm fans, as i will need a good amount of pressure as this also has to go through a lot of drives etc...

cheers all

jbates58
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post #2 of 4
Pull will make cleaning much easier, while push may get you 1-3*C lower
     
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post #3 of 4
Not a huge difference between the two really:

shroudtest-22.png?w=614
Source: Martin's Push vs. Pull vs. Shroud Testing V2.

The Delta AFB1212HE is a 38mm fan.

There is only 0.5°C difference between push and pull, push being better. Not really worth worrying about.
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post #4 of 4
Apart from temps, another difference between push and pull on a rad is what tone of noise the fan will make. Best thing to do is try as many different combinations as you can and choose the optimal regarding noise, temps.

Also, as Pedro suggests, you need to think about whether you are introducing more positive pressure or negative pressure, i.e. whether most of the fans are intake or exhaust. More intake than exhaust is better if your house is dusty (like mine) and it's maybe worth putting filters on. Filters add restriction and will decrease effectiveness of the fans.
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