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    Adding Underfloor heating to Vaillant system with eBus need separate zone, help!

    Current system is Ecotec boiler with Vr65 control centre and uniSTOR cylinder with NTC thermistor temperature sensor (not a traditional thermostat switch). We upgraded the hard wired ebus Thermostat to a wifi vaillant vSmart one a few years ago. Now we're having Underfloor heating in a new...