switching relays

Dear friends , i have emontx+emonth systems with plenty of sensors, and i would like to open/close the "8 zones/rooms " of my home heated by an heating pump  by switching relays , i have places DS18b20 sensors in all the rooms of my house, and all the rooms have a floor radiant heating system, so i would like to receive some suggestion about how to control this system , there are APPS or software that can interact with EMON system and that can help me to setup a solution ?
in a simply way i would like to simulate a single thermostat that can control 8 different relays.
thanks for your help.