I have read some squabbling on other threads about what is the best fan to replace a worn out Cofan that came in the Tivo Series3. So I bought three fans from NewEgg and made a video of my testing to end the debates. I decided to go with a fan which was very quiet (important to me) and actually put out a bit more air than the original Cofan ... it also happened to be the cheapest. The video of my test is on YouTube. To view it, go to YouTube and search for "rws70 tivo". I tested: (all from NewEgg.com) EVERCOOL FAN-EC7025M12CA 70mm Item #: N82E16835119040 APEVIA CF7025S 70mm Item #: N82E16835228027 GELID Solutions Slient 7 FN-SX07-22 70mm Item #: N82E16835426040 The APEVIA CF7025S was the clear winner and only costs $5. If you really want some extra air flow and don't mind a little background whirring sound during standby then the Evercool (out of stock today) might be for you. I often read in my living room when the TV is off and the Tivo is on Standby, and I like it quiet. I am very happy with the Apevia and you can see and hear for yourself in the video of my tests on YouTube, so you don't have to take my word on it. The video is my first, the editing isn't so great but it should help in the decision making and installation for all my fellow Tivo Series 3 diehards and do it yourselfers! Cheers rws70 Edit regarding bearing type: I am pretty sure the bearing type on the Apevia fan is sleeve as it is only rated for 25,000 hours. The Evercool is single ball bearing and rated for 60,000 hours. No question the ball bearing type is more durable. So I may be changing this fan out in a year or two. When I was a kid, I could not sleep with our pet dog because his breathing noise kept me awake. I guess I really like the silence. If anyone finds a 70mm bearing fan that is truly whisper quiet please advice.