Hoi, it's on my desk and I can take the pressure without getting up, I've never noticed any heat emission, my notebook is a heating oven in comparison. I can see small slits on the back, the rest is fully panelled. It's a great purchase, but waiting until it's on sale or taking its little brother will do.

If you look from the front, the heat dissipation is at the rear right.

On the left side of the printer quite far back.
The printer emits very little heat.