I bought a refurbished Roamio OTA for my daughter and son-in-law. When he set it up, it was noisy and ran hot to the touch. I've had 3 Tivos, a series 2 (now retired), a Premiere, and a Premiere XL. None of them have run hot or been noisy. I've noted that the Roamio has a fan between the hard drive and the circuit board, near the middle of the machine, and, of course, a plastic case. They called TiVo and received an advance exchange for another refurbished TiVo OTA, but when they set it up, it too was noisy and hot. I think they are going to return both TiVos for a refund. Is this an inherent design flaw? Do all Roamios run hot and noisy? It is loud enough to be heard 20 feet away. Is there any use in requesting a third refurbished Roamio?