I’m planning to put a cAP AC https://mikrotik.com/product/cap_ac mounted on the ceiling in a bedroom closet that is approximately 2 meeters by 1 meeter. Since the closet doors are normally closed I wanted to make sure there would be enough ventialtion for the device. Does anyone have any thoughts or experience with this? Thank you.
Tested ambient temperature -40°C to 50°C
Unless the temperature in the bedroom rises above, let’s say, 50C, I don’t see any problem 
Plenty of network devices stored in a much smaller cabinet with higher power requirements survive already for so many years …
Strictly speaking there will be no ventilation at all, so all the air in the closet will eventually get warm enough that the temperature gradient across the thickness of the ceiling, walls, and doors will be sufficient to dissipate the max. 13 Watts of power to the ambient environment. Most of it via the ceiling as warm air stays at the top of the container. So I wouldn’t worry if the ambient temperature would be below 30 °C; if the ceiling is a good heat conductor (such as solid concrete), even more may be acceptable. And the 13 Watts are really the absolute maximum during heavy traffic.
Off topic, do you live in a cartoon that your closets are 2D?
Thanks fo rthe replies. I’m going to install it in the closet today.
I dont think my closet will go above 50C so I’m good for sure.
Ha Ha Ha That’s so funny! 
I needed a good laugh like that today. I actually though about editing my OP to include the height but didnt do it.