If you don't have full openings front and back, I would personnally not put it in the unit. But there's nothing wrong with trying... just make sure you have a good warranty.
Well, I really don't have any other choice. The return air grill right behind it should help though.
what does your Denon manual say? I think mine was like 4" of room around the receiver.
It just says "provide adequate space". It doesn't really warn about anything too close, it just says keep away from heat sources and don't put anything directly on top of it. 3" top, 4" sides, 6" rear... Seems more than enough, I am just paranoid.
