Is it possible to connect an exhaust fan to the passage switches?
Please tell me whether it is possible to connect to the walk-through switch in the shower, so that when I enter, I can turn on the lighting in the shower with the second button with the second exhaust fan, and can I control the single-button fan inside the shower?
You can, not for long. This is dangerous, but you’re going to shower a 220V phase. You can do it this way, what's the problem? The scheme will not change in any way. The two-key switch, lighting, as I understand it, will be controlled from one point, so we connect one key like a conventional switch (incoming phase to the middle contact, phase to the lamp to one of the output contacts), and we connect the hood according to the standard switch circuit . And if the question was whether it is possible to connect the hood in this way, then the answer is simple - it is possible.