I just had to replace my unit after working fine for 5 months. It suddenly refused to recognize the smart card. When pulling the old unit out, I noticed that it was very hot. It lives in an entertainment center. The clearance on the sides is about an inch. I've removed some other components to give it more room on the top. I've also added a timer to shut the power off during non-user hours (11 pm to 6 am.) I'm also thinking of adding a fan or two behing the unit to help circulate fresh air to the sides, where the venting holes are? Any comments? Will the daily power cycle help or hurt? Are the fans necessary? Will they help? Is this box not meant to sit in a home entertainment center?