Floor Heating: Wireless Actuator Management with NSPanel & 4CHPROR3

Hello,

I currently plan a renovation in my house and eager to introduce some Sonoff technologies. One of the areas that I am a little bit confused is floor heating. Currently there is no wiring from rooms to the heating system. To avoid the complexity of wiring through the walls I was thinking the possibility of using NSPanels with 4CHPROR3 where 4CHPROR3 is connected to actuators and NSPanel manages 4CHPROR3 on/offstates.

I am not hundred percent sure if this is doable and how the cabling, configuration look like. Actuators are generally NC switches, in such case shall I connect the actuator L to NC port of the 4CHPROR3 and terminate neutral in some way?

As I understand 4CHPROR3 can not multiplex L or N from input to the R ports it has. We need to terminate cables seperately in COM ports, right?

Regards,