After searching around, I'm confused about clearance on the sides of my receiver for cooling. The manufacturer recommends 30cm above the receiver but I haven't been able to find any shelving units that would allow for such a space after doing some quick lookarounds. I'd prefer to use my current TV stand but that would allow only about 1/2 inch clearance on top but plenty of room on the sides. It's not enclosed so it's open air on all the sides.
My question, then, is do I need to provide additional cooling, such as with a fan, for such a layout? To repeat, it sits on a glass shelf with 1/2-inch clearance on top but open air on all four sides.