DIRECTV HD DVR/Receiver Discussion
Here is my solution. I made a nice mounting plate and mounted two 120mm 12v fans (1600rpm 28db) that are thermally controlled. They are off at 80F, 50% at 90F, 75% at 100F and 100% at 110F. My HR21 has never exceeded 104F and the Apple TV isn't even close to as hot as it was sitting on top of...