Zoned radiant heating system and method

A method of providing separately controlled heating of a plurality of zones in a building, the method comprising:

• receiving a radiator demand signal provided by at least one source of demand for each of the plurality of zones, the at least one source of demand providing the radiator demand signal comprising a radiator, each radiator demand signal representing a demand of the radiator for hot water in the respective zone;
• receiving a domestic hot water demand signal from at least one other source of demand, the at least one other source of demand providing the domestic hot water demand signal comprising a domestic hot water fixture, each domestic hot water demand signal representing a demand of the domestic hot water fixture for hot water;
• combining the demand signals to determine an aggregated hot water demand having one of a zero value representative of zero hot water demand and a non-zero representative of non-zero hot water demand;
• selectively deactivating the boiler when the aggregated hot water demand is determined to have a zero value, wherein the aggregated hot water demand is determined to have a zero value when each radiator demand signal and the domestic hot water demand signal represent zero demand from the respective source of demand;
• and
• deactivating each of the sources of demand when the boiler is deactivated.

A heating fluid control system for a building comprising a boiler configured draw power from a power source to heat heating fluid and a plurality of sources of demand configured to use the heating fluid from the boiler, the sources of demand including at least one radiator in each of a plurality of zones of the building configured to radiantly heat the respective zone using heat of the heating fluid, the sources of demand further including a domestic hot water fixture, the heating fluid control system comprising:

• a plurality of valves fluidly connected between the boiler and the plurality of sources of demand, each of the valves being selectively openable and closable to control the heating fluid that is supplied from the boiler to at least one of the respective sources of demand, each of the valves being further configured to transmit a valve condition signal representing whether the valve is open or closed;
• a controller operatively connected to each of the valves to receive the respective valve condition signal and configured to determine based at least in part on the received valve condition signals when the heating fluid control system has zero aggregate demand for heating fluid, the controller being further configured to automatically adjust the boiler to limit the power drawn from the power source when the controller determines that the heating fluid control system has zero aggregate demand for heating fluid;
• wherein the aggregate demand for heating fluid is determined to have a zero value when each received valve condition signals represent the respective valve is closed indicating zero demand from the respective source of demand;
• and
• wherein the controller is further configured to deactivate each of the valves when the boiler is deactivated.