I have a H-23 on the shelf in my bedroom closet. It controls the TV just the other side of the wall. I leave a lot of air around it for heat to vent but I do store my slippers on top of it. When I take my slippers down from the shelf, they are toasty. I love the comfy feeling they give me when I first put them on. Thank you, DirecTV, for my warm slippers.