Reach your hand behind your receiver or TV. Do you notice that it’s warmer back there? You’re feeling the residual heat given off by hard-working electronic devices. Unfortunately, high temperatures contribute to the failure of all kinds of small electronic components, from printed circuit boards to resistor, capacitors, and batteries. It’s a conundrum: audio and video electronics produce heat, and yet heat is seriously hazardous to their health. Between the receiver, two video-game consoles, and the TiVo, my entertainment center can get quite hot, especially during the summer. Since the TiVo (and, to a lesser extent, the consoles) is on at all times, it never really cools down inside the cabinet.
Computer designers tackled this problem long ago: most PCs include a rear exhaust fan and one or more open grills near floor level to admit fresh air so the computer does not overheat. Now that we’re putting PC-style devices in our living rooms, we need to treat the entertainment center like a giant PC case.
To keep my equipment cool, I installed an exhaust fan in the back of my entertainment center. Adding an exhaust fan that pushes air out of the case creates an effective negative pressure in the case and draws in new air from every open point. Of course, you need an inlet hole for air to enter the case for this process to work. Hot air rises, so you want an exhaust hole near the top to remove heated air and an inlet hole near the bottom of your container to draw in cooler air.
You spent a lot of money on this stuff! Make sure your equipment keeps working for as long as possible by keeping its critical parts cooled. All you need to do is cut a minor hole in the back of your entertainment center, find a suitable fan, and decide how to power it. I promise to make it simple. Read the rest of this entry »