Intake/Outake Orifice Size?

[Esoteric C.G.]

Hello all,
I am in the need of some advice.
Given a 53.7 Cubic foot box, 40” wide x 40” deep x 58” high, how many CFMs would be optimal for the exhaust fan? Would an intake fan with less CFMs create more favorable conditions than no intake fan?
Also, would TWO 4” holes, one in the lower portion and one in the upper portion of the box for intake and exhaust, be sufficient? Or are 6” holes recommended?

Any and all advice is appreciated. Please let me know if any more specifics are needed.

 

[Matanuskan Flo]

http://www.icmag.com/ic/showthread.php?t=112862

Ventilation 101 ^, should have specified. sorry Freezerboy, could have saved you the trouble. Great minds think alike.

 

[FreezerBoy]

Ventilation 101

In my case (22x29x54) CFM for cooling exceeds the CFM needed for air exchange. Your lamp(s) will determine your CFM needs.

Intake fans are the sole source of positive pressure. We want negative pressure. Intake fans should be left to the pros.

While you can get by with less, the easy way is Venting for Dummies which calls for 3 equal sized holes per fan: two passive intakes at the bottom, one exhaust at top for the fan. Neither the exhaust port itself or the fan needs to be at the top of the cab as long as the exhaust is drawn from the top of the cab. That's where the heat is, that's what you're trying to get rid of.

 

[headfortrinity]

Intake/Outake Orifice Size?

That's kind of a personal question

 

[Tokesome]

That's kind of a personal question

Heh heh

 

[Esoteric C.G.]

I have seen that guide, but I only scratched the surface.

Thank you FreezerBoy. That is precisely what I was searching for.

 

[Tokesome]

I have seen that guide, but I only scratched the surface.

Thank you FreezerBoy. That is precisely what I was searching for.

You guys got maths and physics degrees then? I cant understand the 101 thread, it just confused lil ole me.

Toke

 

[madpenguin]

That's kind of a personal question

Shit. Someone always beats me to it....

 

[FreezerBoy]

Well, that's a little TMI ...

 

[Tokesome]

Well, that's a little TMI ...

Darn, there you go again KUCF TI, lol