I am doing a pretty specific project, where I plan to connect up to 150 devices, mostly depending on ESP32 and a few ESP8266 devices.

All of them will be located in a tiny space of around 5-8 square meters.

 * Are there any research or norms (like ISO in Europe) that touches that topic?
 * Is it healthy to have so many active devices in such a small space?

 * How many wifi devices (ESP32 or ESP8266) can be “mounted” in one square meter (Ideally some researches or legal norms, not “just experience” or “commons sense” because this project aims to be a commercial one)
 * Is this a really health concern?
 * are there any research on that?