I have installed a patch panel and two switches in the wall-mounted housing. So there are no thermal problems. I am currently planning to install a small NAS and adapt the existing installations. I assume that the installation of a NAS will not be a problem, but we will see. There is an air gap of 14 mm between the glass door and the housing on the left and right. I would not recommend installing a router as the housing is earthed (Faraday cage).

Hello, how is the air flow?
- Decent.
Do you need fans?
- Depending on your router(s). If there is enough space for airflow then no.
Also, if you put a router inside, do you lose a lot of wifi bandwidth?
- Yes, never put a wifi router in a cage.