anybody ever make a 'chimney' or 'heatstack' for their case?

[soccerballtux]

You aren't looking for a chimney, you are looking for what every clothes dryer on the planet does to pipe heat away from said clothes dryer

Get a $5 flexible dryer tube from Home Depot and call it a day

square fitting that's 6x9"? I thought they were only round and 4-5" diameter

 

[soccerballtux]

trust me, i've done similar stuff over the years ... you won't get layed from this

gosh you guys are gullible! I'm being facetious, it's going to get in the way of getting laid if anything!!!

 

[Yuriman]

Depends on the company you keep.

 

[soccerballtux]

lol

now I need to decide if I should disable the rear fan and just let the top 2 fans do the work

regardless, I should be able to put off the move to Intel for another few years

 

[RampantAndroid]

Putting sharp bends in will add a fair bit of resistance to the fans in the case. Why don't you just have a small fan blowing upwards from back there? Heat rises...

 

[soccerballtux]

Putting sharp bends in will add a fair bit of resistance to the fans in the case. Why don't you just have a small fan blowing upwards from back there? Heat rises...

not at such a low speed

I got a D in thermo but I'm 90% certain the fluid flow here through that bend won't be a problem.

 

[RampantAndroid]

not at such a low speed

I got a D in thermo but I'm 90% certain the fluid flow here through that bend won't be a problem.

I don't know how much it'll affect it (I skipped out on thermodynamics in college....didn't need it for a CE degree) but I can say you're adding a bit of resistance that'd be quite a bit better if you avoided right angles...

 

[soccerballtux]

mmmm, I disagree. you can try yourself by getting a 3/4" PVC pipe, putting 4 right angles on it, and blowing through it. Notice how easy it still is!

 

[RampantAndroid]

mmmm, I disagree. you can try yourself by getting a 3/4" PVC pipe, putting 4 right angles on it, and blowing through it. Notice how easy it still is!

If you have equipment to measure CFM, then let's talk.

 

[Soulkeeper]

lol

now I need to decide if I should disable the rear fan and just let the top 2 fans do the work

regardless, I should be able to put off the move to Intel for another few years

I completely blocked off the side and rear fans on my case. Overlapping electrical tape worked pretty well for this. With this approach i'm able to keep a positive pressure setup with intake in the front and exhaust on the top. This is also good for dust control, because I have a filter on the front intake.

 

[jj109]

lol

now I need to decide if I should disable the rear fan and just let the top 2 fans do the work

regardless, I should be able to put off the move to Intel for another few years

When I was faced with your problem, I just moved my tower out from under my desk...

I like your solution better.

 

[Mondozei]

This is an awesome thread

 

[scannall]

Apple did that once, more or less.

I wish they'd do something like that again.

You mean kinda like this?

 

[monkeydelmagico]

Oh...you didn't say it was personal emergency. Dang!

You need 2 minutes with a jigsaw. Cut a hole in the desk. 120mm-140mm - measure before or after cutting. Not during tho.

Mount a decent fan on the underside of the newly breathing desk vent - fan blowing up into the hole. A ball-bearing fan would be best - a GT or Vadar. Caution: the color choice will be crucial.

Get a pretty, but cheap flower vase. Preferably one larger than the diameter of the freshly cut hole in the desk. I know, more time-wasting measurements.

Cut the bottom out of the vase. This is why you selected a cheap plastic vase, but a good looking one. That is key.

Place the now bottomless vase over the desk 'vent' - secure using duct tape or gravity. Gravity is prolly the better aesthetic choice.

Place some low airflow restriction unnatural (or natural if you want to keep doing this every frikkin' day - also need an inner water container for the natural ones) flowers in the vase (did I mention the step about a grille over the fan? No matter.) What/where do you get low airflow restriction flowers?

That's a question for your local craft shop airflow expert. I know, there's no time for that. So, go with some thin stemmed mock tulips or other low drag petal shape. Arrange in a unique artistic layout that displays your sensitive artistic side.

Voila...in less than 15 minutes you've untrapped the hot, trapped under-desk air, created a functional vent stack that is a work of floral art. A visual testament that not only are you an innovative DIYer, but that you appreciate above all beauty in its many forms.

TIP: Do not let her touch or sniff the fake flowers. This could jeopardize the goal of the entire endeavour.

Cook her a gourmet meal. This is another key. Not good with the gourmet cooking. Watch some episodes of Hell's Kitchen - don't do what they do, just do what Gordon does - esp. with the sauces. Leave out the colorful language.

Voila! Mission accomplished.

:biggrin:

You sir are a creative genius. Bravo. Take it a half step further for greatest benefit. Post pics on etsy and pinterest. Link to christian mingle profile. OP will have all the ladies.

 

[Yuriman]

I'm actually inspired to create a baffle under my case now, though. Redirecting airflow so it isn't recycled strikes me as a good idea.

 

[Ken g6]

You mean kinda like this?

Yeah, but it has a fan. I'd want no fans, no spinning drives, no moving parts of any kind. A fast, absolutely silent computer.

 

[john3850]

mmmm, I disagree. you can try yourself by getting a 3/4" PVC pipe, putting 4 right angles on it, and blowing through it. Notice how easy it still is!

I was taught not to use 90 degree right angles and use 2 45 degree angles instead to avoid any restriction.

 

[soccerballtux]

I was taught not to use 90 degree right angles and use 2 45 degree angles instead to avoid any restriction.

that probably does help some. It's also used in PCB traces to reduce EMF emissions

 

[alaricljs]

Once?

edit: would help if I didn't read a thread 2 hrs after I loaded it...

 

[soccerballtux]

Once?

edit: would help if I didn't read a thread 2 hrs after I loaded it...

trash can photo from amazon?

 

[alaricljs]

Ya think?

 

[soccerballtux]

Ya think?

http://www.amazon.co.jp/exec/obidos/ASIN/B0018NRM9U/enumeration-22/ref=nosim/

 

[BonzaiDuck]

So you are going to drill a chimney hole in your desk? Good plan. Some paper towel rolls and duct tape should get you started.

Paging BonzaiDuck.....

I haven't focused on any external PC ducting. Of course, IDontCare's remark about clothes-dryer ducting I find most appropriate. Certainly, the problem exists for anyone such as myself who keeps computers under a desk. Perhaps the problem is exacerbated with an open, functional fan-exhaust vent at the case top.

Once you start modifying furniture and adding extrusions to your case, I could only predict regrets further along as you replace old PCs with new, exchange cases, or something else. I suppose I'd consider 4"-dia PVC tubing or something similar to that in the Amazon link -- deployed at the rear exhaust fan, if I chose not to use the top-panel vent for exhaust (or even intake for that matter.)

 

[soccerballtux]

#1. ok, oddly, turning off the rear fan makes 3C difference in temperature. I thought replacing the top two fans with dual Aerocool Shark fans would be enough to move the hot air out the top but -NOPE-. Why? Because, #2.

#2. I think I will be careful before buying a case with metal and/or plastic mesh over the fan holes. Those make a huge difference in airflow. Right now I have the CM690

#3. For now I am going to cut out the metal mesh at the top and bottom. I need to get a tool to help me smooth off those edges. I'm going to cut myself for sure. I kid you not, max temps of 61C full load 100% fans at 4.6ghz/1.44v, and 58C with the rear 120mm fan running. I could design such a good case based on what I know now...and frankly, you should now leave the fan installation up to the user. The users are too dumb. Actually, maybe you should, because it gives them opportunity for growth. I had total n99b fan placement until I started all this testing.

 

[KingFatty]

For localized hot spot under the desk, a tiny desk-style office fan on the floor blowing across your ankles toward one side of the space under the desk would probably be enough to dig out that hot air and get some cool floor air under there.

This assumes you have sufficient cooling for the entire room/house, and it's just a localized hot spot trapped under your desk. But if you need to get the hot air out of the house, then perhaps some air ducting (dryer exhaust tube) might work, in conjunction with a window duct adapter like this: