I have 5 heating zone to control and domestic hot water in total i have 6 zone heating system, Four zone are on first floor with wired thermostat treated as single zone, ground floor zone with Nest wireless thermostat and domestic hot water with wired thermostat. I have 3 relays (1 for each zone) for upstairs and downstairs with electric zone valve, so when the thermostat close then zone valve power up and open zone and send 220 to zone…