Help on positive air flow

[soonyee12345]

Recently i just started learning about building a custom pc and im planning to build a pc on a phanteks enthoo luxe case. Im planning to use the stock fans and im putting in another two 140mm fans as exhaust and all of the fans are connected to the pwm fan hub and that is where i have a problem.I have three 140mm fan on top of the case a 140mm fan at the rear as exhaust but only one 200mm fan as intake.

 

And so,

1. Will the case have a positive airflow?

2. How much air does a 200mm fan move.

3. How much air does other fan sizes move.

 

Thanks

[Bogica]

1. You should have equal or slightly positive airflow. This is ideal, however it depends on the airflow, by the sound of it you will have nagative airflow.

2-3.Depends, usually 200mm fans work on low RPM and smaller ones on higher RPM so the airflow depends on the type or fan and the RPM, you can usually get airflow information from the manufacturers website.

[Mixzzz]

Find the specs about the 200m fan and I doubt that it will provide enough airflow as the 2 exhaust. Usually 200mm fans perform the same as 140mm fan in terms of airflow but the run at a lot lower RPMs and provide a lot less sound

[spwath]

There will def be negative

[Spev]

Recently i just started learning about building a custom pc and im planning to build a pc on a phanteks enthoo luxe case. Im planning to use the stock fans and im putting in another two 140mm fans as exhaust and all of the fans are connected to the pwm fan hub and that is where i have a problem.I have three 140mm fan on top of the case a 140mm fan at the rear as exhaust but only one 200mm fan as intake.

 

And so,

1. Will the case have a positive airflow?

2. How much air does a 200mm fan move.

3. How much air does other fan sizes move.

 

Thanks

Hmm, this is actually very similar to a couple situations for me, and I'm most likely building my main rig in the Phanteks case. It seems like you have more exhuast that intake, therefore you will have negative pressure. Positive pressure is what you want, I'm still trying to figure out the best fan setup for two cases I'm working on atm.

[LogicalDrm]

With that config you will have negative pressure for sure. And I don't get why you would need as much exhaust anyway. You can easily remove one or two fans and still have it efficient enough. The 200mm fan in there has 110CFM at full speed. Depending on which fan models Phanteks is using as their case fans, you can have even three of those and still be on positive side by making them run slower than 200mm.

[soonyee12345]

What about two 140mm front and one 140mm bottom as intake, 200mm top and 140mm as exhaust?