Yes, that is where I placed the AC Infinity fan. (Actually, AC Infinity calls this particular unit a blower — drawing air in along the axis of rotation and blowing it out to the side in a direction perpendicular to that axis of rotation.) I could be wrong, but I read that the stock fan in the TiVo Bolt blows air OUT of the TiVo. If not, I’ll probably experiment further. And yes, I am using one of the Bolt’s USB ports to power the fan (blower). Of course, in this configuration the internal hard drive is no longer sitting horizontally, but I’ll worry about that later if I hear/read that this could affect the longevity of the drive.