Originally Posted by
lordmatthias
I actually did something similar put with my old media center furniture. I had a HTPC and a number of other devices in it and it had terrible ventilation. I picked up a couple 200mm low DB/high CFM computer case fans, measure where the mounting hole are and then cut holes in the back of the media center to mount them (the bottom fan cold air intake, and the top hot air exhaust).
After that you will need to figure out a source of power, they are extremely low power units so you don't need much, there are a number of solution. They make fan controllers you can buy that will work, or you can wire it to your PC directly so that they only run while the PC is on (this is probably the most preferable solution). For me I was unable to do that because I am running a Mac Mini running Win8.1, so I actually stripped an old cell phone charger I had (making sure that the voltage/amplitude would not burn out the fans. I then soldered the fans into the charger and applied electrical tape to each individual connection and then the whole thing so it looked like one piece. I then set that up an a $10 wireless remote switch so I could turn it on and off as desired.