@jake thanks for your advice My 8 zones = 8 rooms. My equithermal control is able to maintain the desired temperature where the thermostat is. But it is difficult to regulate the temperature in other areas. And it's almost impossible to change it. That's why I want to improve my system with zone ...

Hello. I plan to use SVT for zone control of underfloor heating. I only have underfloor heating. I plan to regulate 8 zones. I have a gas boiler with equithermal regulation. This means that the boiler actually has an outdoor temperature sensor and automatically adapts the heating water temperature ...