![]() ![]() It doesn't need to be incredibly accurate, just within an eighth of an inch or so. Use the same method as above, except you'll have to eyeball it a little. Now remove the case door and measure the position of the CPU fan. My original prototype was for example 4-5/8" from the top and 3-1/2" from the side. Do the same for the side and write these measurements down. Begin by measuring the distance from the top of the case to the top part of the vent hole (measuring to the screw hole is good). However, if you're unlucky like me, you'll have to put that trigonometry you learned in high school to the test (who would have thought you'd use that again?). If that's the case, you can skip the majority of the steps below. If you're lucky, your side intake vent lines up exactly with your CPU fan. (Especially if you have to buy any of those tools -) Everything else I had on hand, so your costs may vary a bit. The PVC I had cut at my local hardware store (most, if not all, will cut to length for you) and the plywood was from a much larger sheet I used in a different project. All I had to buy was the PVC and the plywood. I say that this project only costs $3 because that's about what it cost me. 4 regular case fan screws (or just two if that's all you can scrounge).computer case with side intake vent close to CPU fan (if you're handy enough you can make yourself a vent).drill press (makes using the hole saw easier). ![]() 3" Hole saw (can be replaced with a scroll saw or a square saw).Miter saw (can be replaced by a regular hand saw).I used the following tools and materials in this build (there are other ways to do this, but this is what I had available to me): Tools: I managed to give myself a nice burn with my soldering iron doing another mod not long ago, which just goes to show you what can happen if you're not careful. I am not responsible if you hurt yourself attempting this mod and I hope you don't. Safety glasses are recommended in just about any endeavor including tools, so if you think you need them, WEAR THEM. Just a friendly reminder: Always know the proper use of any of your equipment - read any manuals and take all safety precautions. If you like what you see, subscribe to my YouTube channel for more! It will work with larger (or smaller) sided vents, but obviously you'll have to modify your materials, calculations, and assembly for that. This project is designed to fit an 80mm side vent, which seems to be standard on most mid-range cases nowadays. I took it out and finally built something I'd been knocking around my head for a while. First I had to modify it out of the box to fit on the fan for my CPU heatsink, then I had to duct tape it in place, and it would sometimes grind against the fan when it ran - it was a pain. Having used a collapsible fan duct for a few months, I finally decided that it was too much of a pain in the neck. There are some commercial solutions that aren't too expensive (usually $10-$20), but what I've made is definitely the right price - only $3. Having an opening in the case in line with the CPU fan helps, but the air from this method is at best a mixture of some fresh air and some already from the case. Instead of using air taken in from a front port, which has time to warm up from other components, the duct sucks in fresh air from the outside environment. Having a intake duct straight from the side of your computer case into the CPU fan can give you much better cooling than any other (air) cooling option. ![]()
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