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Ambient temp - Page 6

post #51 of 59
Thread Starter 
in one of my rooms downstairs we have 2 doors sometimes when you open one (into the room) the other door opens. this is the same pressure situation
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post #52 of 59
i don't have time to read every page, but if you didn't try it already, id look into a high cfm exhast fan. I have kinda the opposit problem as you. I have strong 2x 120mm 108cfm exhuast fans sucking air out but a single 75cfm fan for the only intake. It use to be a 25cfm intake fan but I noticed large gains when I tried to equalze the air coming in vs. the air going out.
post #53 of 59
Thread Starter 
yeah i was going to look into that

thanks for the reply
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post #54 of 59
yeah no prob.

I just kind think of it like a car enthusiast, and try to elimiate the bottlenecks. In your case exhaust, in my case Intake..

I'm not sure if you have a closed case with no vents but I know having the right fan setup is even more evident when the case is sealed with a window or something.

but, lol, before I changed the front intake fan the rear fans where sucking so hard it would turn the front fan when I unpluged it. So it was a no brainer that the front fan was actually hurting my air flow than aiding it..
post #55 of 59
Thread Starter 
update :

i have added a 92mm fan to the side of my case (exhaust)

and my ambient case temp has dropped 5C

i now have 2 x 120mm intake
1x 80mm + 1x 92mm + 1x 120mm exhausts
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post #56 of 59
Quote:
Originally Posted by tUDJ View Post
update :

i have added a 92mm fan to the side of my case (exhaust)

and my ambient case temp has dropped 5C

i now have 2 x 120mm intake
1x 80mm + 1x 92mm + 1x 120mm exhausts

Good deal Buddy!! Glad to see you getting those temp's under control!!!
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post #57 of 59
Quote:
Originally Posted by boredom View Post
Into the case but you don't *really* need it

People need to stop suggesting the whole positive/negative pressure cooling "advice". If you were to actually create a negative pressure in your case it would crumple up and implode on itself, postive pressure would cause the case to bloat up and send shrapnel everywhere... it's not possible to do either of these
You can't be serious?

Try blowing into a glass bottle. Postive pressure. I can assure you it won't blow up.

Try sucking, negative pressure. You've creative a vaccuum, and instead of fresh air being sucked in, your lips do.

8 120mm fans wouldn't even begin to bend or stress the metal in 99.9% of cases. I'm sure of it.
    
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post #58 of 59
Quote:
Originally Posted by Taeric View Post
That would be absolutely true...if the case had absolutely no strength, i.e. a case made out of paper. Steel and aluminum cases could resist a fair amount of pressure before flying apart, though as has been said, the vast majority of cases are not air tight, which keeps pressure differences minimal.

HVAC designers often plan on having positive or negative pressure in the buildings, and those building do not explode or implode. If you ever enter a building (office buildings are notorious for this) and it takes almost no force to open the door, it's likely because the building is slightly pressurized. While the pressure is not enough to blow the door open (though I've seen this recently - a nearby building had it's doors open 8-10 inches simply from the building pressure), it is enough to "lighten" the force necessary to open them.
EXCELLENT!

I know in some buildings, the doors will whistle and hum from the air rushing past the little openings. If you open the doors, its like being in a wind tunnel. You walk outside.....cool and calm.

Has anyone ever walked up a subway tunnel? Warm, stagnant air downstairs, but as you walk up, man what a breeze! You get up and out, and hey, its not windy!

I'm a physics dork....
    
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post #59 of 59
Quote:
Originally Posted by pbasil1 View Post
True! All true! My room is actually positively pressurized, when the AC is on. With the AC has kicked on, of you close my door, you can feel a lot of air rushing out at the bottom of the door. It will even push the door closed if you leave it carcked and the system kicks on....
You know, speaking of rooms and pressurization, this reminds me of a setup I had in a college dorm room. Fans out the window, weather sealant all around. We had negative airflow!

It was awesome! We could drop a piece of paper in the hallway and it would get sucked against the bottom of the outside of the door.

Ah, I'm glad I managed to explained that without violating any forums rules. I won't say why we did this.
    
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