The Zone Valve Control 305V connect up to five thermostat and operate zone valve to provide heating to a zoned hydronic heating system. The 305V operate a system pump whenever a zone valve open. Zone 1 can operate either a zone valve or a circulator to provide heat to an indirect domestic hot water tank with optional priority over zone 2 through 5. The 305V include optional exercising to prevent circulator seizure when not in use and optional post purge operation of the domestic hot water tank to maximize energy saving. The 305V provide a RoomResponse™ signal to modulating condensing boiler to optimize comfort while improving boiler efficiency.