A recess TV requires at least 3 inches above and on the left and right of the TV to allow the proper ventilation. Proper ventilation means enough space for hot air to go out and cold air to come in.  Moreover, if you have in-built ventilation pipes in the walls then it can be perfect for your recessed TV as you link or install your TV mount according to the ventilation pipes. If not, then you can opt for the option of leaving enough space around your TV.